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POSNA 2020 AM Prelim Pgm

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THANK YOUThe Pediatric Orthopaedic Society of North America gratefully acknowledgesthe following for their generous nancial support for 2019. We sincerely appreciate each of these companies for helping POSNA fulll its goals of providing education and fostering research. HOWARD STEEL FOUNDATIONST. GILES FOUNDATIONANGELA S.M. KUO MEMORIAL FUNDDOUBLE DIAMOND LEVELDePuy SynthesStrykerNuVasive, Inc.OrthoPediatricsDIAMOND LEVELMedtronicShriners Hospitals for ChildrenPLATINUM LEVELZimmer BiometGOLD LEVEL Arthrex Globus Medical BioMarin Pharmaceutical Pega MedicalSILVER LEVEL Children’s Mercy Kansas City Stanford Children’s Health Misonix, Inc. Wright Medical Nemours/Alfred duPont Hospital for Children BRONZE LEVEL 7D Surgical Medicrea, USA Children’s Healthcare of Atlanta Merete Technologies, Inc. Gillette Children’s Specialty Healthcare The Pediatric Orthopaedic Society of North America gratefully acknowledgesStryker as the 2020 Sponsor of POSNA’s Annual Meeting Preliminary Program.

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TABLE OF CONTENTSChair’s Invitation ...............................................2Housing & Transportation .......................................3General Meeting Information ....................................4 Objectives, Accreditation........................................4Annual Meeting Policies.........................................5Meeting at a Glance ............................................6Registration Information.........................................7Pre-Course Agenda ............................................8Scientic Program.............................................10Young Member Forum .........................................10Symposia Program ............................................18Subspecialty Day..............................................24Paper Posters.................................................40ePosters .....................................................43Video Abstracts...............................................492019 Awards and Research Grant Recipients ......................51Explore San Diego ............................................52POSNA Membership ..........................................55 DATES TO REMEMBEREarly Registration Deadline ..........................March 20, 2020Pre-Registration Closes ..............................April 20, 2020After April 20, 2020 ...........................please register onsiteHousing Deadline ..................................April 20, 2020FUTURE ANNUAL MEETINGS May 12–15, 2021 May 11–14, 2022 April 26–29, 2023 Dallas, Texas Vancouver, BC, Canada Nashville, TennesseeFUTURE IPOS MEETINGS December 1–5, 2020 December 7–11, 2021 December 6–10, 2022 Orlando, FL Orlando, FL Orlando, FLPOSNA’S NEW ADDRESS (AS OF 2/1/20)1 Tower Lane, Suite 2410Oakbrook Terrace, IL 60181Program Subject to Change1EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG✹NEW!

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2YOU’RE INVITEDDear Colleagues, On behalf of POSNA President Stephen Albanese, MD and the 2020 Program Committee (Michelle Caird, MD, Wudbhav (Woody) Sankar, MD, and Matt Oetgen, MD, and I) it is a great honor to invite you to attend the 2020 Annual Meeting of the Pediatric Orthopaedic Society of North America in San Diego, California on May 12-16, 2020. Once again, a record number (1,061) of abstracts were submitted and were graded by a combination of invited and volunteer readers. Thank you to all 100+ POSNA members who volunteered and have helped to shape a great meeting. All 170 podium presentations, 40 posters, and 80 ePosters are outstanding. Now in its 2nd year, there will be 18 video abstracts showing in the Video Theater, and also available on POSNAcademy. The meeting agenda follows: • The Pre-Course begins Wednesday morning: Transition to Adulthood: Orthopedics for the Adolescent chaired by Noelle Larson, MD. • The 6th Annual Arabella Leet, MD Young Member Forum will be held on Wednesday during lunchtime from 12:20 PM - 1:20 PM and it is organized by Megan Johnson, MD. • The rst scientic session begins at 1:30 PM on Wednesday afternoon and will be followed by the Opening Ceremony Wednesday evening at 6:30 PM. • Thursday is the Symposia Program from 10:00 AM -12:00 PM offering POPS, COUR, Research, Disaster Response Planning, Practice Management and Bone Health. Please take advantage of San Diego and enjoy the free “outdoor recess” on Thursday afternoon.• The Business Meeting will take place at lunchtime on Friday 11:45 AM - 1:15PM to allow study group meetings in the mornings before the start of the scientic sessions. • Friday afternoon is Subspecialty Day, chaired by Woody Sankar, MD. This is devoted to eight sessions covering advanced topics in Spine, Hip, Sports, Upper Extremity, Foot, Trauma, Neuromuscular, and Lower Extremity. Each session will have 6-12 podium presentations that are staggered through the afternoon so attendees can move to different sessions to hear either the paper session or the programs put together by the Subspecialty Day program chairs. This year’s local co-hosts, Peter Newton, MD and his wife, Cathy Newton, and Hank Chambers, MD, and his wife, Jill Chambers, were central in identifying great offerings for Thursday afternoon and the venue for our closing reception, the San Diego Air and Space Museum. The Annual Meeting is the premier venue for pediatric orthopaedic research and education presented in a uniquely collegial and social atmosphere. We sincerely hope you will plan to join us for what will be a fantastic event. We look forward to seeing you in San Diego! Sincerely, Jeff Martus, MD

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EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORGAIRPORT SHUTTLES: Shuttle service is available at the transportation plazas across from San Diego Airport Ter-minals 1 and 2, and curbside at the Commuter Terminal. Several shuttle companies with vans and buses are also available for hire from the airport. LIMOUSINES AND TOWN CARS: Many limousine compa-nies provide service from San Diego International Airport and around the county for special occasions.Getting Around TownMTS provides convenient service to various points downtown and on to Old Town and Mission Valley. MTS provides service to San Diego’s fun places and more:Airport – Rt. 992Balboa Park / Zoo – Rt. 7 & Rapid 215Beaches – From Old Town: Rts. 8 & 9, 30 & 35Coronado – Rt. 901La Jolla – Rt. 30Mexican Border – UC San Diego Blue Line TrolleyOld Town – Sycuan Green Line TrolleySeaWorld – From Old Town: Rt. 93HOUSING& TRANSPORTATIONMEETING INFORMATION Hilton San Diego BayfrontThe Annual Meeting will be held at the Hilton San Diego Bayfront in sunny San Diego, California. Come out and enjoy the sunshine, blue skies, and see what San Diego has to offer.HOUSING INFORMATION Hilton San Diego Bayfront 1 Park Blvd, San Diego, CA 92101Online reservations: Phone reservations: 1-800-HILTONS Please reference the group code POSNA when making reservations by phone.Housing will close April 20, 2020 AIRPORT San Diego International Airport’s convenient downtown location is just one of its many attributes. Within minutes of stepping outside the terminal into the glorious San Diego sunshine, delegates can be at their hotel or meeting facility ready to start the day without precious time wasted. The airport’s historic Green Build Expansion of Terminal 2 opened featuring 10 new gates, more comfortable passen-ger waiting areas, enhanced curbside check-in and exciting new dining and shopping areas including several signature San Diego restaurants like Stone Brewing Company and Phil’s BBQ. Shuttles, taxis and private limousines whisk delegates to their hotels with speed and comfort, making a positive rst impression for meetings and conventions.TRANSPORTATION Ground Transportation to/from Airport:A variety of ground transportation options are available to/from the San Diego International Airport and the hotels in San Diego. MTS (SAN DIEGO METROPOLITAN TRANSIT SYSTEM) Public transit is available to and from the airport and down-town San Diego on MTS’s Route 992 which stops at Terminals 1 and 2 and the Commuter Terminal. It operates 5 a.m.–11 p.m. daily, with service every 15 minutes on weekdays and every 30 minutes on weekends. The bus connects with the San Diego Trolley, Coaster and Amtrak Station and is wheelchair accessible. ©2020 Hilton

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GENERAL MEETING INFORMATION4LEARNING OBJECTIVES Objective 1: Learn about the latest advances in pediatric orthopaedic surgery Objective 2: Obtain opinions of world-renowned thought leaders in the eld Objective 3: Use the information obtained to make improvements in their own practicesObjective 4: Fulll the annual meeting requirements for membership in POSNAACCREDITATION This Annual Meeting of the Pediatric Orthopaedic Society of North America has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint providership of the American Academy of Orthopaedic Surgeons and POSNA.The American Academy of Orthopaedic Surgeons is accred-ited by the ACCME to provide continuing medical educa-tion for physicians.CONTINUING MEDICAL EDUCATION The American Academy of Orthopaedic Surgeons desig-nates this live activity for a maximum of 18.0 AMA PRA Category 1 Credits™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.LANGUAGE English is the ofcial language of POSNA.DISCLAIMER The material presented at the Annual Meeting has been made available by the Pediatric Orthopaedic Society of North America for educational purposes only. The material is not intended to represent the only, nor necessarily best, method or procedure appropriate for the medical situations discussed, but rather is intended to present an approach, view, statement or opinion of the faculty which may be help-ful to others who face similar situations.POSNA disclaims any and all liability for injury or other damages resulting to any individual attending the Annual Meeting and for all claims which may arise out of the use of the techniques demonstrated therein by such individuals, whether these claims shall be asserted by physician or any other person.DISCLOSUREEach Presenter in this meeting has been asked to disclose if he or she has received something of value from a commercial company or institution, which relates directly or indirectly to the subject of their presentation.An indication of the participant’s disclosure appears after his or her name as well as the commercial company or institution that provided the support. POSNA does not view the existence of these disclosed interests or commitments as necessarily implying bias or decreasing the value of the author’s participation in the meeting. EVENT CANCELLATION Due to circumstances beyond our control, POSNA may elect to cancel Annual Meeting 2020. These circumstances may include but are not limited to disaster, severe weather, civil commotion or government laws or regulations. In the event of such cancelation, all Annual Meeting registrants will be notied by email at the address noted in the POSNA database; and registration fees will be refunded in full. Other costs incurred by the registrant, such as airline or hotel penalties, are the responsibility of the registrant.MEMBERS BUSINESS MEETING All POSNA members are invited to attend the Members Business Meeting on Friday, May 15, 2020 from 11:45 AM to 1:15 PM. Committee Chairs will share reports of their recent activities. Lunch will be served.ACCOMPANYING PERSONS BREAKFASTBreakfast will be provided for Accompanying Persons from 8:00 AM to 9:00 AM, and is open for all spouses, children and accompanying persons who are registered and have a badge. NURSING ROOM The Mothers room is located on the Aqua level, nearby the restrooms that are located between Aqua 311 and Aqua 313.

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©SeaWorld San DiegoCourtesy of San Diego CVBEARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG5INSURANCE / LIABILITIES POSNA will not be held liable for personal injuries or for loss of or damage to property incurred by participants or guests at the Pre-Course or Annual Meeting, including those participating in tours and social events. Participants and guests are encouraged to take out insurance to cover losses incurred in the event of cancellation, medical expenses or damage to or loss of personal effects when traveling outside their own country.REPRODUCTION POLICY POSNA reserves any and all rights to materials presented at the Annual Meeting, including Posters, ePosters and Videos. Reproductions of any kind, by any person or entity, without prior written permission from POSNA, are strictly prohibited. Prohibited reproductions include, but are not limited to, audiotapes, videotape, and/or still photography. Cameras or video cameras may not be used in any portion of the scientic sessions. Persons violating this policy may have their badge conscated and be escorted from the meeting. No unapproved surveys, handouts, or literature may be distributed at the meeting.PHOTOGRAPHY Registration and attendance at, or participation in, POSNA activities constitutes an agreement by the registrant to allow POSNA to capture, retain, and utilize (both now and in the future) the attendees’ image, likeness, voice, and actions, whether captured live or recorded and in any format, during the Annual Meeting, for display, exhibition, publication, or reproduction in any medium or context for any purpose, including but not limited to, POSNA member communications, commercial or promotional purposes.NO CAMERAS OR VIDEO CAMERAS Cameras or video cameras may not be used in any portion of the scientic session.NO SMOKING POLICY Smoking is not permitted during any meeting or event.FULL PROGRAM CAN BE FOUND IN THE2020 MEETING APPComing Soon - Access the meeting app by downloading My POSNA from the Apple store or on Google Play.ANNUAL MEETING POLICIES

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*Program subject to change TUESDAY, MAY 12 Board of Directors Meeting8:00 AM–3:00 PM Sapphire 400Registration 4:00 PM–6:00 PM West FoyerPOPS Meeting 8:00 AM–5:00 PM Aqua DEWEDNESDAY, MAY 13 Fellowship Directors Meeting 6:30 AM–7:30 AM Sapphire 400Registration 7:00 AM–5:00 PM West FoyerPre-Course Breakfast/Exhibits7:00 AM–8:00 AM Sapphire APre-Course 8:00 AM–12:00 PM Sapphire BCD Coffee Break/Exhibits 9:45 AM–10:08 AM Sapphire AYoung Member Forum12:20 PM–1:20 PM Aqua CDEScientic Program 1:30 PM–5:29 PM Sapphire BCDCoffee Break/Exhibits 3:12 PM–3:42 PM Sapphire AEveningOpening Ceremony 6:30 PM–8:00 PM Sapphire BCDWelcome Reception 8:00 PM–9:30 PM Indigo TerraceTHURSDAY, MAY 14 Registration 6:30 AM–12:00 PM West FoyerCoffee Break/Exhibits 6:30 AM–7:30 AM Sapphire AConcurrent Session Spine7:30 AM–9:34 AM Sapphire BCDConcurrent Session Sports/Trauma7:30 AM–9:34 AM Indigo AEBFCoffee Break/Exhibits 9:35 AM–9:55 AM Sapphire ASymposia Program Bone Health 10:00 AM–12:00 PM Indigo AEBF POGO/COUR 10:00 AM–12:00 PM Indigo CG POPS 10:00 AM–12:00 PM Indigo D Practice Management10:00 AM–12:00 PM Indigo H Research 10:00 AM–12:00 PM Aqua CDE Trauma 10:00 AM–12:00 PM Sapphire BCDFRIDAY, MAY 15 Registration 6:30 AM–5:30 PM West FoyerBreakfast/Exhibits 6:15 AM–7:15 AM Sapphire AScientic Program Award Papers7:15 AM–10:38 AM Sapphire BCD Coffee Break/Exhibits 9:25 AM–9:45 AM Sapphire ADistinguished Achievement Award10:40 AM–10:55 AM Sapphire BCD2021 Meeting Announcements10:56 AM–11:03 AM Sapphire BCDPresidential Speaker 11:04 AM–11:24 AM Sapphire BCDPresidential Transfer 11:25 AM–11:35 AM Sapphire BCDMember Business Meeting11:45 AM–1:15 PM Sapphire BCDSubspecialty Day Hand/Foot 1:40 PM–5:30 PM Indigo D Hip 1:40 PM–5:30 PM Sapphire BCD Neuromuscular/LE 1:40 PM–5:30 PM Indigo H Spine 1:40 PM–5:30 PM Indigo AEBF Sports 1:40 PM–5:30 PM Aqua CDE Trauma 1:40 PM–5:30 PM Indigo CGCoffee Break/Exhibits 3:25 PM–3:45 PM Sapphire AEveningClosing Reception 7:30 PM–11:00 PM Air and Space Museum SATURDAY, MAY 16 Registration 7:00 AM–11:30 AM West FoyerBreakfast 7:00 AM–8:00 AM Sapphire APOSNA Board Meeting8:00 AM–10:00 AM Indigo 204Scientic Program 7:30 AM–11:40 AM Sapphire BCDCoffee Break 9:40 AM–10:00 AM Sapphire AMEETING AT A GLANCE6DATES TO REMEMBER Early Registration Deadline- March 20, 2020Pre-Registration Closes- April 20, 2020After April 20, 2020 - please register onsite.

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MEETING REGISTRATION Full meeting registration includes sessions starting Wednesday afternoon, May 13, 2020 through Saturday morning, May 16, 2020 and includes: course material, Wednesday Opening Ceremony & Reception, Friday Subspecialty Day, Friday Closing Reception, coffee breaks and 3 breakfasts.Please Note: The Half Day Pre-Course requires a separate registration and fee. Attendance at this meeting, does not meet the member meeting attendance requirement.FRIDAY, MAY 15, 2020SUB-SPECIALTY DAY We will have a special One-Day ONLY registration rate for those who wish to attend the meeting only on Friday. This registration rate will include breakfast, all sessions on Friday, and Closing Reception. See registration rates.Please Note: Registration and attendance at only the Sub-Specialty Day does not meet the member meeting attendance requirement as stated in the Bylaws.DISCLOSURE OF PERSONAL INFORMATION When registering for Annual Meeting, your personal iden-tifying information is retained by POSNA. You understand and agree that POSNA may disclose your name, address, and contact information to your hotel and other service providers in order to conrm hotel room reservations and meeting attendance numbers.PRIVACY POLICY - USE OF PERSONAL INFORMATION Annual Meeting registration lists, including the registrant’s name and postal mailing address are provided to POSNA’s sponsors as a sponsor benet. No nancial or other per-sonal identifying infor mation is disclosed. POSNA takes reasonable steps to ensure that our sponsors protect your information on POSNA’s behalf.CANCELLATION POLICY A full refund will be granted if notication is received, in writing, at POSNA, 1 Tower Lane, Suite 2410, Oakbrook Terrace, IL, 60181 USA, through April 20, 2020. A 20% administrative fee will be charged after April 20, 2020. No refunds will be given after May 12, 2020.EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG7MEETING REGISTRATIONEARLY REGISTRATION FEES (US Dollars) POSNA Member: ......................... $ 700Non-Member:............................ $ 950Resident/Fellow*: ......................... $ 475RN/PA/Allied Health: ...................... $ 475Delegates from Reduced Rate Countries: Low Income: ........................... $ 400Accompanying Person:..................... $ 350Senior Members: ......................... $ 400Children 6-12, per child:.................... $ 10Children 13-17, per child:................... $ 100After March 20, 2020: ........... additional fee $50Pre-Registration closes on April 20, 2020Onsite Registration: ............. additional fee $50PRE-COURSE REGISTRATION Member:................................ $ 175Non-Member:............................ $ 215RN/PA/Allied Health: ...................... $ 115Resident/Fellow*: ......................... $ 115FRIDAY, SUBSPECIALTY DAY REGISTRATION* Friday ONLY – Member:.................... $ 265Friday ONLY – Non-Member:................ $ 315Friday ONLY – Allied Health: ................ $ 215Friday ONLY – Resident/Fellow:.............. $ 215*Residents/Fellows must have the phone number and signature of their Chief of Service on their registration form to qualify for the reduced fee. Without a signature and phone number, you will be charged the non-member fee.A $50 increase will be charged for meeting registration received after March 20, 2020. Registration closes on April 20, 2020. Any registration received after that date may not be recorded and you may be asked to pay on site. There will be an additional $50 fee for those registering on site. If you need to pay with check, email for a registration form. All checks must be in US dollars drawn on a US Bank. If paying by check, please mail your registration to: POSNA1 Tower Lane, Suite 2410Oakbrook Terrace, IL 60181ACCOMPANYING PERSONS MUST BE REGISTERED IN ORDER TO ATTEND ANY FUNCTION, INCLUDING OPTIONAL EVENTS. ✹NEW!

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8TRANSITION TO ADULTHOOD: ORTHOPEDICS FOR THE ADOLESCENTChair: A. Noelle Larson, MDWEDNESDAY, MAY 13, 2020 8:00 AM – 12:00 PMDESCRIPTION Pediatric orthopedic surgeons care for children from infancy to adulthood, and the adolescent years present special challenges both in surgical decision-making and patient and parent communication. In this precourse, we will discuss when to introduce adult treatment strategies in the adolescent years and how to achieve age-appropriate orthopedic care. Further, at every visit with adolescents and young adults, there is an opportunity to intervene and change the trajectory of young people’s health by promoting informed shared decision making and guided autonomy. This partnership is critical in the treatment of adolescents. This course will discuss evidence-based communication skills to improve patient/parent/surgeon conversations and discuss longterm implications of pediatric orthopedic treatment.LEARNING OBJECTIVES Upon completion of this program, participants should be able to:Objective 1: Differentiate orthopedic conditions which are best treated with adult treatment strategies rather than a pediatric orthopedic approachObjective 2: Assess treatment approaches in adolescents that may result in future harm or altered health related quality of life and identify how to mitigate potential deleterious effectsObjective 3: Develop evidence-based communication skills to address unique needs and consider-ations specic to adolescentsACCREDITATION This activity has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint providership of the American Academy of Orthopaedic Surgeons and the Pediatric Orthopaedic Society of North America. The American Academy of Orthopaedic Surgeons is accredited POSNA 2020 PRE-COURSEProgram Subject to Changeby the ACCME to provide continuing medical education for physiciansCONTINUING MEDICAL EDUCATION The American Academy of Orthopaedic Surgeons designates this live activity for a maximum of 3.5 AMA PRA Category 1 Credits™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.PROGRAM 8:00 AM–8:05 AM Welcome and Overview A. Noelle Larson, MD8:05 AM–8:32 AM Trauma Upper Extremity in Adolescents Moderator: Donald Bae, MD eModerator: Samantha Spencer, MD8:05 AM–8:11 AM Distal Radius Fracture Girls 11-14; Boys 13-15 – What Alignment is Acceptable at What Age? Pinning vs. Plates Mauricio Silva, MD8:11 AM–8:17 AM Distal Radial Physeal Bar and Ulnar Overgrowth, Indications for Treatment, Epiphyseodesis vs. Ulnar Shortening Osteotomy in Adolescents, How Should You Monitor Distal Radius Physeal Fractures Julie Samora, MD8:17 AM–8:25 AM Radius Shaft Fractures – What Alignment is Acceptable at What Age? Nails vs. Plates? Christine Ho, MD8:25 AM–8:32 AM Proximal Humerus Fractures – What Alignment is Acceptable in Children 10 and up? Pooya Hosseinzadeh, MD 8:32 AM–8:40 AM Cases and Discussion8:40 AM–9:10 AM Lower Extremity Moderator: David Podeszwa, MD eModerator: Matthew Schmitz, MD8:40 AM–8:45 AM Has the Threshold for Epiphyseodesis vs. Lengthening Changed in the Era of Magnetically Controlled Rods? L. Reid Boyce Nichols MD, FAAOS

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9EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG9PRE-COURSE, CONTINUED8:45 AM–8:50 AM Internal Fixation vs. Casting: Tibial Shaft Fractures in Adolescents Jeffrey Martus, MD8:50 AM–8:55 AM A Foot to Last a Lifetime – Is Hindfoot Fusion Ever Appropriate for Pediatric Orthopedic Conditions Derek Kelly, MD8:55 AM–9:10 AM DEBATE: Teenage Trashed Hip Reconstruct and Attempt at Salvage Eduardo Novais, MD Total Hip Arthroplasty Provides a Fine Result and What Peds Ortho Surgeons Can Do to Optimize THA Richard Santore, MD 9:10 AM–9:20 AM Cases and Discussion9:20 AM– 9:45 AM Spine Moderator: Laurel Blakemore, MD eModerator: Lorena Floccari, MD9:20 AM–9:33 AM DEBATE: Neuromuscular Minimally Ambulatory Patient Fuse to the Pelvis Rachel Thompson, MD Stop Short of the Pelvis Sumeet Garg, MD, FAAOS 9:33 AM–9:45 AM DEBATE: 45 Degree Skeletally Mature Athlete with Lumbar Curve with Oblique Takeoff + Leg Length Discrepancy Observe Nicholas Fletcher, MD Fuse Ying Li, MD9:45 AM–10:08 AM Break10:08 AM–10:50 AM Transition to Adulthood and Surviving Adolescence Moderator: A. Noelle Larson, MD eModerator: Eric Edmonds, MD10:10 AM–10:20 AM Preoperative Considerations for Teenagers: DVT Prevention, Vaping, OCPs, SI, Drug Addiction: What Questions Can You Not Afford to Miss? Benjamin Shore, MD, MPH, FRCSC 10:20 AM–10:35 AM How to Practice Kind, Careful Medicine: Shared Decision-Making Juan Brito Campana, MD 10:35 AM–10:50 AM What is Happening in the Teenage Brain and How to Communicate with Them? Ken Taylor, MD10:50 AM–11:00 AM Cases and Discussion11:00 AM–11:20 AM Long-Term Impact of Pediatric Orthopedic Treatment Moderator: Jim Kassar, MD eModerator: Amy McIntosh, MD11:00 AM–11:05 AM Radiation Safety. . . How to Minimize Pediatric Exposure Jeffrey Sawyer, MD 11:05 AM–11:10 AM Anesthesia Safety. . . Are We Causing ADHD? Lindsay Andras, MD 11:10 AM–11:15 AM Retained Implants? Can They Stay or Can They Go? Is There Systemic Harm from Metallosis? Michelle Caird, MD11:15 AM–11:20 AM Screw Malposition. . . Are there Long-term Repercussions to Malpositioned Pedicle Screws? Terry Amaral, MD 11:20 AM–11:30 AM Cases and Discussion11:30 AM–11:35 AM I Discharge My Patients at Age 18, This is Appropriate Purnendu Gupta, MD11:35 AM–11:40 AM I Keep Seeing My Patients Long into Adulthood Steven Koop, MD11:40 AM–11:45 AM What Happens to our Neuromuscular Patients in Adulthood: Pathway to Independence and Maximal Function Wade Schrader, MD 11:45 – 12:00 PM Discussion

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GENERAL SESSION:TRAUMAModerator: Jeffrey Sawyer, MDeModerator: Holly Leshikar, MD1:30 PM–1:35 PM Introduction and Opening Remarks11:36 PM–1:40 PM 22 Years of Pediatric Musculoskeletal Firearm Injuries: The Carnage Continues Richard Schwend, MD; Emily Boschert, BA;  ConnorStubbleeld,BS;KimberlyReid,MS Children’sMercyHospital,KansasCity,MO 21:41 PM–1:45 PM Optimizing Triage of Orthopedic Transfers to a Level 1 Pediatric Trauma Center: Is there a Role for Telemedicine? Rameez Qudsi, MD;KathrynLeyden,BA;NancyMoontasri,MD;AlfredAtanda,MD Nemours/A.I.duPontHospitalforChildren,Wilmington,DE 31:46 PM–1:50 PM Age-Based Screening for Non-Accidental Trauma in Children Less than 3 Years Old with Femur Fracture RaheelAli,MD;VarunBora; LorenzoDeveza,MD;AngelaBachim,MD;BinitaPatel,MD;Scott Rosenfeld, MD TexasChildren’sHospital,Houston,TX 1:51 PM–1:59 PM Discussion 42:00 PM–2:04 PM Fracture Characteristics Predict Suboptimal Alignment in Pre-School Femur Fractures Treated in a Spica Cast AmirhosseinMisaghi,MD; MahmoudMahmoud,MD; AlexandreArkader,MD;Keith Baldwin, MD Children’sHospitalofPhiladelphia, Philadelphia,PA 52:05 PM–2:09 PM Sagittal Plane Residual Deformity in Pediatric Type II Supracondylar Humerus Fractures Mauricio Silva, MD;MatthewDay,BS; BiankaAceves-Martin,BS; EdwardEbramzadeh,PhD OrthopaedicInstituteforChildren, LosAngeles,CA 102020 ANNUAL MEETING SCIENTIFIC PROGRAMProgram Subject to ChangeWEDNESDAY, MAY 13, 2020 2020 ARABELLA LEET MEMORIAL YOUNG MEMBER FORUMChair: Megan Johnson, MD12:20 PM–1:20 PMThe POSNA Young Member Forum is held in honor of Dr. Arabella Leet, who passed away in 2013 after a sudden illness. Dr. Leet was a highly accomplished Pediatric Orthopaedic Surgeon with a special interest in children with Cerebral Palsy. At the end of her career, she served as Chief of the Shriner’s Hospital in Honolulu, Hawaii. This year the Young Member Forum will focus on a variety of topics relevant to pediatric orthopaedic surgeons in the rst 5 years of their practice, as well as residents and fellows pursuing careers in pediatric orthopaedic surgery. Members of POSNA will share their own personal experience and wisdom on the topics selected, with time for discussion at the end of the symposium. Lunch will be served.12:20 AM–12:24 PM: Welcome / Arabella Leet Memorial MeganJohnson,MDand MargaretSiobhanMurphy-Zane,MD12:25 PM–12:30 PM: Developing a Career Action Plan: Academic and Professional Advancement StephenAlbanese,MD12:31 PM–12:36 PM: Getting to Yes: Negotiation with your Practice and Administration DavidSkaggs,MD,MMM12:37 PM–12:42 PM: Mentors, Networking, and POSNA MichelleCaird,MD 12:43 PM–12:48 PM: Success at Home and Work: How to be a Great Mom/Dad/Surgeon AmyMcIntosh,MD12:49 PM–12:54 PM: Lessons Learned: Mistakes from My First 10 Years John(Jack)Flynn,MD12:54 PM–1:18 PM: Panel Discussion MargaretSiobhanMurphy-Zane,MD, StephenAlbanese,MD, DavidSkaggs,MD,MMM, MichelleCaird,MD, AmyMcIntosh,MD, John(Jack)Flynn,MD1:18 PM–1:20 PM: Concluding Remarks MeganJohnson,MD

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EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDWEDNESDAY, MAY 13, CONTINUED 62:10 PM–2:14 PM Operative Versus Non-Operative Management of Acute Pediatric Monteggia Injuries with Complete Ulna Fractures Mauricio Silva, MD;ChristopherHart,MD;JoshuaBram,BS;AlexandreArkader,MD UCLA/OrthopaedicInstituteforChildren,LosAngeles,CA 2:15 PM–2:23 PM Discussion GENERAL SESSION:INFECTIONS AND TUMORModerator: Samantha Spencer, MDeModerator: Tom McPartland, MD72:24 PM–2:28 PM Abbreviated Non-contrast Imaging Protocol Decreases Costs and Improves Value in Treatment of Pediatric Musculoskeletal Infection Todd Blumberg, MD;  ShingVarakitsomboon,BS; VivianaBompadre,PhD; MaheshThapa,MD;SarahMenashe SeattleChildren’sHospital,Seattle,WA 82:29 PM–2:33 PM Surgical Management of Children with  OsteomyelitisResultsinSignicantlyGreaterIdenticationoftheCausativeOrganism: Results from the CORTICES Multicenter Database Vidyadhar Upasani, MD;BrianBrighton,MD; RachelGoldstein,MD; BentonHeyworth,MD;MarkMiller; JuliaSanders,MD; JonathanSchoenecker,MD,PhD; WalterTruong;CorticesStudyGroup RadyChildren’sHospitalSanDiego, SanDiego,CA 92:34 PM–2:38 PM Can CRP Predict the Need to Escalate Care After Initial Debridement for Musculoskeletal Infection? Jonathan Schoenecker, MD, PhD;  JoshuaDaryoush,BS;JosephGibian,BS; ColbyWollenman,BS;MeganJohnson,MD; IsaacThomsen,MD;StephanieMoore VanderbiltUniversityMedicalCenter, Nashville,TN 2:39 PM–2:47 PM Discussion 102:48 PM–2:52 PM Pediatric Chondroblastoma and the Need for Chest Staging Alexandre Arkader, MD;AmyWilliams,MD; OdionBinitie,MD;MihirThacker,MD; GermanFarfalli,MD Children’sHospitalofPhiladelphia, PhiladelphiaPA 112:53 PM–2:57 PM Synthetic Bone Graft Substitute for Treatment of Unicameral Bone Cysts: Preliminary Results John Williams, MD;CarlNunziato,MD;RonaldWilliams,MD DellChildren’sMedicalCenter,Austin,TX 122:58 PM–3:02 PM Low Rate of Healing and High Incidence of Complications in Benign Pediatric Bone Tumors Treated with Synthetic Calcium Sulfate-Calcium Phosphate Bone Graft Kenneth Illingworth, MD;AliSiddiqui,BS; LindsayAndras,MD;BensenFan,MD;JamesBennett,MD;VernonTolo,MD;DavidSkaggs,MD,MMM Children’sHospitalLosAngeles, LosAngeles,CA 3:03 PM–3:11 PM Discussion 3:12 PM–3:42 PM Break 11

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122020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeWEDNESDAY, MAY 13, CONTINUED GENERAL SESSION: QSVIModerator: Julie Samora, MDeModerator: Alfred Mansour, MD133:46 PM–3:50 PM Improving Patient-Family Experience in Pediatric Ambulatory Orthopaedics James McCarthy, MD;  AndreaShafferEllis,RN;CarieNorris,RN;SandySingleton,MBA; JenniferAnadio,MA CincinnatiChildren’sHospital, Cincinnati,OH 143:51 PM–3:55 PM Improving Access to Care by Implementing LEAN Methodology in a Pediatric Orthopaedic Clinic Ron El-Hawary, MD;KarlLogan,MBBS;BenjaminOrlik,MD;LukeGauthier,MD; MichaelDrake,MBA;KristynReid,MSc;LucasParaanowicz,MSc; ElizabethSchurman,MS; ShelleySaunders,MA; LeeAnnLarocque,MSPH;KristinTaylor,PT IWKHealthCentre,Halifax, NovaScotia,Canada 153:56 PM–4:00 PM Rational Electronic Medical Record Template Design and Implementation Improves Documentation Quality Sasha Carsen, MD, MBA, FRCSC;  ChristopherMattice,PhD;AndrewTice,MD; HollyLivock,MSc;KevinSmit,MD CHEO,Ottawa,Ontario,Canada 4:01 PM–4:09 PM Discussion 164:10 PM–4:14 PM Implementation of a Venous Thromboembolic in a Pediatric Orthopaedics: High Rates of High Risk Patients Henry Ellis, MD;MeaganSabatino,BA;KerryWilder,RN,MBA;CharuSharma,MD TexasScottishRiteHospitalforChildren,Dallas,TX 174:15 PM–4:19 PM Use of Virtual Reality Distraction to Manage Anxiety During Cast Removal in Children: A Prospective, Randomized Trial Mark Sinclair, MD;PaigeChase,MS; JuliaLeamon,RN;AshleySherman,MA Children’sMercyHospital,KansasCity,MO 18 4:20 PM–4:24 PM Virtual Reality (VR) to Reduce Pain and Anxiety in the Pediatric Orthopaedic Outpatient Setting: A Randomized Controlled Trial BejaanJivraj,MBBS;EmilySchaeffer,PhD;JeffreyBone,MSc;ChelseaStunden,MPH;EvaHabib,BS;JohnJacob,MSc; Kishore Mulpuri, FRCSC BCChildren’sHospital,Vancouver,BC, Canada 4:25 PM–4:33 PM Discussion 194:34 PM–4:38 PM A Negative Workplace Culture is Associated with Burnout in Pediatric Orthopaedic Surgeons Cordelia Carter, MD;VishwasTalwalkar,MD; JenniferWeiss,MD;RichardSchwend,MD;MichaelGoldberg,MD NYU-LangoneMedicalCenter,NewYork,NY 204:39 PM–4:43 PM Infection Prevention Pathway for Scoliosis: What is Necessary for Success? WilliamRandall;BenjaminMartin,MD;ShannonKelly,MD;Matthew Oetgen, MD Children’sNationalHospital, Washington,DC 214:44 PM–4:48 PM Using Data-Driven, Principled Negotiation with a Clinician-Integrated Approach to Achieve Best Values on Spinal Implants EliCahan,BA;AmandaChawla,MA; LyNguyen,MS;JamesLee,BS; SerenaHu,MD;JohnRatliff; MeghanImrie,MD;JohnVorhies,MD; StevenFrick,MD;Kevin Shea, MD StanfordSchoolofMedicine,Stanford,CA 4:49 PM–4:57 PM Discussion

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EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDWEDNESDAY, MAY 13, CONTINUED 224:58 AM–5:03 PM RellingOpioidPrescriptionsafter Pediatric Orthopaedic Surgery: Who is at Risk for Opioid-Seeking Behavior? BlakeMeza,BS;Ishaan Swarup, MD;  ThaddeusWoodard,BS; AlejandroCazzulino,BA;ApurvaShah Children’sHospitalofPhiladelphia,PA 235:04 PM–5:08 PM Pills at Home: Teenagers Report Pain and Opioid Usage Following Posterior Spinal Fusion in AIS Using Text Messaging NishankMehta,BA;John(Jack)Flynn,MD; DanielMiller,MD; Wudbhav(Woody)Sankar,MD; PatrickCahill,MD;FarisFazal,BS; Apurva Shah, MD, MBA Children’sHospitalofPhiladelphia, Philadelphia,PA 245:09 PM–5:13 PM Decreasing Overall Narcotic Load in a Pediatric Population Using Standardized Home Going Postoperative Pain Management Standardization Kerwyn Jones, MD;LaurieEngler AkronChildren’sHospital,Akron,Ohio 255:14 PM–5:18 PM Safely Reducing Unnecessary Radiographs in Suspected Pediatric Musculoskeletal Injuries Through a Multidisciplinary Developed Algorithm SarahLanderMD;JulieMichels; AnneBrayerMD;SarahObudzinski; TaylorD’AmoreBA;MitchellChessMD;DerekWakemanMD;P.CookMD; James Sanders MD UniversityofRochester, Rochester,NewYork 5:19 PM–5:29 PM Discussion 13

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2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUED14THURSDAY, MAY 14, 2020 CONCURRENT SESSION:SPINEModerator: Stephen Albanese, MDeModerator: Jen Bauer, MD7:30 AM–7:34 AM Welcome Remarks 267:35 AM–7:39 AM Surgical Complications of Anterior Vertebral Body Growth Modulation for Skeletally Immature Patients with Idiopathic Scoliosis Stefan Parent, MD;  AbdulmajeedAlzakri,MD; MarjolaineRoy-Beaudry,MSc; IsabelleTurgeon,BS; MarieBeausejour,PhD;OlivierTurcot,MD CHUSainte-Justine,Montreal,Quebec,Canada 277:40 AM–7:44 AM Anterior Vertebral Body Tethering vs. Posterior Spinal Fusion for Adolescent Idiopathic Scoliosis: Results of a Surgeon-Sponsored FDA IDE Study Todd Milbrandt, MD;SmithaMathew,MBBS; A.NoelleLarson,MD;DonaldPotter,MD MayoClinic,Rochester,MN 287:45 AM–7:49 AM Anterior Vertebral Body Tethering Shows Mixed Results at 2-Year Follow Up Kevin Neal, MD;CourtneyBaker,MD; GaryKiebzak,PhD Nemours,Jacksonville,FL 7:50 AM–7:58 AM Discussion 297:59 AM–8:03 AM Comparison of Traditional Growth Friendly Surgeries and Magnetically Controlled Growing Rods for the Treatment of Early Onset Scoliosis in Patients with Cerebral Palsy MargaretManGerSun,PhD; NicholasBuckler,BS;MasonAlNouri,MD; MajellaVaughan,MPH;TriciaSt.Hilaire,MPH; PaulSponseller,MD,FAAOS; JohnSmith,MD;GeorgeThompson,MD;JasonHoward,MD; Ron El-Hawary, MD DalhousieUniversity,Halifax,NovaScotia,Canada 308:04 AM–8:08 AM Five Year Radiographic Outcomes Following Discontinuation of Growth Friendly Surgery for Early Onset Scoliosis Robert Murphy, MD;WilliamBareld,PhD;JohnEmans,MD;BehroozAkbarnia,MD; PaulSponseller,MD,FAAOS; GeorgeThompson,MD; DavidSkaggs,MD,MMM; DavidMarks,FRCS;CharlesJohnston,MD; John(Jack)Flynn,MD;TriciaSt.Hilaire,MPH; JeffreySawyer,MD;JohnSmith,MD MedicalUniversityofSouthCarolina,Charleston,SC 318:09 AM–8:13 AM What’s It Worth? Growth-Friendly Surgery Results in More Growth but a Higher Complication Rate and Unplanned Returns to the Operating Room Compared to Single Fusion in Juvenile Neuromuscular Scoliosis Ying Li, MD;JennyleeSwallow,MS; JoelGagnier,PhD;PatrickCahill,MD; PaulSponseller,MD,FAAOS; SumeetGarg,MD;GeorgeThompson,MD; BrandonRamo,MD; PediatricSpineStudyGroup C.S.MottChildren’sHospital, MichiganMedicine,AnnArbor,MI 8:14 AM–8:22 AM Discussion 328:23 AM–8:27 AM Validation of the Early Onset Scoliosis Questionnaire (EOSQ) as Applied to the ClassicationofEarlyOnsetScoliosis(C-EOS) Etiology Designation Before Scoliosis Treatment Brandon Ramo, MD;AnnaMcClung,RN;Chan-HeeJo,PhD;BurtYaszay,MD; LindsayAndras,MD;MatthewOetgen,MD TexasScottishRiteHospital,DallasTX 338:28 AM–8:32 AM Is Growth-Friendly Surgery Effective for the Treatment of Spinal Deformity in Patients with Arthrogryposis Multiplex Congenita? BramVerhofste,MD;John Emans, MD; PatriciaMiller,MS;GeorgeThompson,MD;AmerSamdani,MD; FranciscoPerez-Grueso,MD; AnnaMcClung,RN;PediatricSpineStudyGroup;MichaelGlotzbecker BostonChildren’sHospital,Boston,MA

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EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG152020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDTHURSDAY, MAY 14, CONTINUED 348:33 AM–8:37 AM AgeStratiedOutcomesofMehtaCastingin a Large Multi-Center Cohort of Idiopathic Early-Onset Scoliosis Patients Graham Fedorak, MD;BruceMacWilliams;MichalSzczodry,MD;PeterStasikelis,MD;JoelLerman,MD;JoshuaPahys; KimHammerberg,MD ShrinersHospitalsforChildren-SaltLakeCity,  SaltLakeCity,Utah 8:38 AM–8:46 AM Discussion 358:47 AM–8:51 AM Serious Perioperative Adverse Events After Pediatric Cervical Spine Fusions BramVerhofste,MD;NoraO’Neill,BA; MichaelHresko,MD;JohnEmans,MD;Daniel Hedequist, MD BostonChildren’sHospital,Boston,MA 368:52 AM–8:56 AM ModiedProximalHumerusPhyseal ClassicationSystemforGrowth Prediction in Children Brian Smith, MD;EricLi;ElsayedAttia,MD;AshleyStartzman,DO;DonLi; JosephKahan;AlanaMunger,MD; AhmedElabd,MD;SiddharthJadhav,MD;JonathanCui,MD;ErinCravez,MD; LoganPetit,MD;DanielCooperman,MD;RonanTalty,BS TexasChildren’sHospital,Houston,TX 378:57 AM–9:01 AM The Relationship of Olecranon  ApophysealOssicationandSanders Hand Scores to the Timing of Peak Height Velocity in Adolescents JanelleGreene,MD;DonLi;KristinYu,BA;Raymond Liu, MD;DanielCooperman,MD YaleUniversitySchoolofMedicine, NewHaven,CT 9:02 AM–9:10 AM Discussion 389:11 AM–9:15 AM Deformity Angular Ratio is Associated with Neuromonitoring Changes without a Vertebral Column Resection: Spinal  DeformityisMoreInuentialthanTypeofSurgery Kenneth Illingworth, MD;AliSiddiqui,BS;DavidSkaggs,MD,MMM; LindsayAndras,MD Children’sHospitalLosAngeles, LosAngeles,CA 399:16 AM–9:20 AM TheAxialSpinalCordClassicationIsAssociated with Intraoperative Neurologic Alerts for Pediatric Scoliosis Patients Smitha Mathew, MBBS;ToddMilbrandt,MD;  WilliamShaughnessy,MD; AnthonyStans,MD;A.NoelleLarson,MD MayoClinic,Rochester,MN 409:21 AM–9:25 AM Preoperative Halo-Gravity Traction for Severe Pediatric Spinal Deformity: Can It Replace a Vertebral Column Resection? ScottLavalva,BA;JoshuaPahys; SumeetGarg,MD;DavidBumpass,MD; DanielSucato,MD,MS;AmerSamdani,MD; JohnEmans,MD;MarkErickson,MD; MichaelKelly,MD;LawrenceLenke,MD; MunishGupta;OhenebaBoachie-Adjei,MD;  PaulSponseller,MD,FAAOS; PeterNewton,MD;RichardMcCarthy,MD;SukenShah,MD;HarryShufebarger,MD;BurtYaszay,MD;Patrick Cahill, MD Children’sHospitalofPhiladelphia, Philadelphia,PA 9:26 AM–9:34 AM Discussion 9:35 AM–9:55 AM Break

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162020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeTHURSDAY, MAY 14, CONTINUED CONCURRENT SESSION:SPORTS/TRAUMAModerator: Eric Edmonds, MDeModerator: Jennifer Beck, MD7:30 AM–7:34 AM Welcome Remarks 417:35 AM–7:39 AM Use Caution When Assessing Pre-Operative Leg Length Discrepancy in Pediatric Patients with Acute Anterior Cruciate Ligament Injuries LindsaySchlichte,MS;PeterFabricant,MD;ChristineGoodbody,MD;FrankCordasco;Daniel Green, MD HospitalforSpecialSurgery,NewYork,NY 427:40 AM–7:44 AM Comparing the Relative Utility of Wrist and Tibial Tubercle Apophysis X-Rays in Determining Skeletal Age in Pediatric Patients Undergoing ACL Reconstruction MihirDekhne,MS;IsabelleKocher,BA; KathrynWilliams,MS;SarithaSankarankutty; BentonHeyworth,MD; MatthewMilewski,MD; Mininder Kocher, MD, MPH BostonChildren’sHospital,Boston,MA 437:45 AM–7:49 AM Quadriceps Tendon Autograft for Pediatric Anterior Cruciate Ligament Reconstruction Results in Less Graft Failure and Meniscus Re-injury TylerHall,BA;CarlyStrohbach,BA; KianaKing;LucianoLazzaretto; CraigFinlayson;Neeraj Patel, MD Ann&RobertH.LurieChildren’sHospital ofChicago,Chicago,IL 7:50 AM–7:58 AM Discussion 447:59 AM–8:03 AM Association Between Psychological Read-iness, Patient Reported Outcomes and Return-to-Sport Following Primary Anterior Cruciate Ligament Reconstruction: Readiness Outcomes Affecting Return-to-Sport (ROAR) Matthew Milewski, MD;JessicaTraver;MelissaChristino,MD;RyanCoene; KathrynWilliams,MS;DaiSugimoto;DennisKramer,MD;Yi-MengYen; MininderKocher,MD,MPH;LyleMicheli,MD BostonChildren’sHospital,Boston,MA 458:04 AM–8:08 AM Comparison of 6-Month Return to Sports Assessments Following ACL Reconstruction in Male vs. Female Adolescents: A Matched, Sex-Based Cohort Analysis of 543 Patients KathleenMaguire,MD;DaiSugimoto; LyleMicheli,MD; MininderKocher,MD,MPH; Benton Heyworth, MD BostonChildren’sHospital,Boston,MA 468:09 AM–8:13 AM Cost-Effectiveness for Return-To-Play (RTP) Programs after Anterior Cruciate Ligament Reconstruction ChristopherDefrancesco,MD; DrakeLebrun,MD;JosephMolony,PT;MadisonHeath,BS;Peter Fabricant, MD HospitalforSpecialSurgery,NewYork,NY 8:14 AM–8:22 AM Discussion 478:23 AM–8:27 AM POSNA Surgeons Warning: Multicenter StudyRevealsArthrobrosisIncidence After Operative Management of Tibial Spine Fractures Higher than Previously Reported JoshuaBram,BS;JulienAoyama,BA; R.JustinMistovich,MD;Yi-MengYen; HenryEllis,MD;RushyuanLee,MD; PeterFabricant,MD;DanielGreen,MD;AristidesCruz;ScottMcKay,MD; GregorySchmale,MD; Theodore Ganley, MD Children’sHospitalofPhiladelphia, Philadelphia,PA 488:28 AM–8:32 AM Do Not Discount Non-Operative Treatment: Factors Associated with a Successful Closed Reduction of a Tibial Eminence Fracture Henry Ellis, MD;MorganAdkins,BS; MarilynElliot,BS;SharonHuang,BA;CharlesWyatt,NP;PhilipWilson,MD TexasScottishRiteHospitalforChildren,Dallas,TX

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EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG172020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDTHURSDAY, MAY 14, CONTINUED 498:33 AM–8:37 AM A Comparison of Non-Operative and Operative Treatment of Type II Tibial Spine Fractures NiyathiPrasad,BS;TheodoreGanley,MD;HenryEllis,MD;JulienAoyama,BA; R.JustinMistovich,MD;Yi-MengYen; PeterFabricant,MD;DanielGreen,MD;AristidesCruz;ScottMcKay,MD; GregorySchmale,MD;JasonRhodes,MD;JasonJagodzinski,MD;IndranilKushare;BrantSachleben,MD;M.Sargent,MD;Rushyuan Lee, MD JohnsHopkinsUniversity,Baltimore,MD 8:38 AM–8:46 AM Discussion 508:47 AM–8:51 AM Outcomes of Pediatric Acetabular Fractures Managed Operatively: Results of a Large, Consecutive Series of Patients from 2 Large Academic Medical Centers Evan Sheppard, MD;KyleCichos,BS; AliceHughes,MD;TaylorSwansen,MD;JessicaHeyer,MD;GeraldMcGwin,MS;ElieGhanem;ShawnGilbert,MD; ShannonKelly,MD;JamesDeBritz,MD;ClaySpitler,MD UniversityofAlabamaatBirmingham, Birmingham,AL 518:52 AM–8:56 AM Expert Consensus for a Principle-Based ClassicationinTreatmentofDiaphysealPediatric Femur Fractures Daniel Weltsch, MD;KeithBaldwin,MD;DivyaTalwar,MPH;John(Jack)Flynn,MD Children’sHospitalofPhiladelphia, Philadelphia,PA 528:57 AM–9:01 AM Dorsal-Entry Flexible Radial Nails and Extensor Pollicis Longus Injury: “Entry-Point of the Devil?” or “The Devil’s in the Details?” Junichi Tamai, MD;DerekHayden,DO;CharlesMehlman,DO;RogerCornwall,MD CincinnatiChildren’sHospitalMedical Center,Cincinnati,OH 9:02 AM–9:10 AM Discussion 539:11 AM–9:15 AM Incidence of Compartment Syndrome and Fasciotomy and Associated Risk Factors in Children with Supracondylar Fractures of the Elbow Douglas Armstrong, MD;  RhettMacneille,MD;ErikLehman,MS; WilliamHennrikus,MD PennStateHersheyMedicalCenter, Hershey,PA 549:16 AM–9:20 AM Prospective, Randomized, Blinded Trial Demonstrates Decreased Pain During Supracondylar Pin Removal with Noninvasive Electrotherapy Stimulation Compared to Placebo NatalyaSarkisova;RachelGoldstein; ErinMeisel,MD;NinaLightdale-Miric,MD;DavidSkaggs,MD,MMM; Lindsay Andras, MD Children’sHospitalLosAngeles, LosAngeles,CA 559:21 AM–9:25 AM Is the Pendulum Swinging in the Right Direction? Displaced and Non-Displaced Supracondylar Humerus Fractures Have Similar Functional Outcomes with Casting Rushyuan Lee, MD;AlexandraDunham;WalterKlyce,MD;RanjitVarghese,MD;AlvaroIbaseta,MS;CalebGottlich,BS;FranciscoEguia,BA JohnsHopkins,Baltimore,MD 9:26 AM–9:34 AM Discussion 9:35 AM–9:55 AM Break

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182020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangePEDIATRIC ORTHOPEDIC GLOBAL OUTREACH (POGO) DELIVERY OF PEDIATRIC ORTHOPEDIC GLOBAL OUTREACH IN 2020 AND BEYONDCo-Chairs: Eric Fornari, MD and Michael Heffernan, MDPediatric orthopedists have been at the forefront in global health for the last half century and have helped our profession and society in meaningful and impactful ways. In 2001, the Children’s Orthopedics in Underserved Regions (COUR) committee was formed to help POSNA members carry out this work in resource-limited environments. The COUR committee recently changed its the name to the Pediatric Orthopedic Global Outreach (POGO) committee in order to better reect the evolved role the committee has for our membership and the Society. The mission of POGO will be carried out through a combination of Education, Coordi-nation, and Research. This year’s symposium will focus on how to develop a sustainable global outreach program. We will cover the ethics of getting involved with such work as well as ideas for how to track outcomes to ensure all goals are being met. Finally, we will give our members a chance to discuss some of the programs they have developed with the goal of stimulating discussion, collaboration, and engagement. This is an opportunity to build on the work of the visionary leaders who laid the foundation for us to shape the future. 10:00 AM–10:05 AM Welcome and Introduction to Symposium EricFornari,MD(POGOChair)10:05 AM–10:10 AM Introduction of POGO Scholars MichaelHeffernen,MD(POGOVice-Chair)10:10 AM–10:30 AM An Orthopedic Journey in a Low Income Country and the Way Forward for Long Term Sustainable Change: The Haitian Experience PierreMarieWoolley,MD10:30 AM–10:50 AM Development of “Care Pathways”  KevinShea,MD10:50 AM–11:05 AM Development of Registry/Multicenter Research? How to Help Start a Research Program in Resource Limited Environments KishoreMulpuri,MD11:05 AM–11:35 AM Panel on Current Pediatric Orthopedic Programs. This is How We Run our Program… MatthewSchmitz,MD – Ecuador  CollinMay,MD – Colombia MaryseBourchard – Vietnam  JoshMurphy – El Salvador MarkBarry – Tanzania GeraldHarris – Colombia, Mumbai, Manila and Mexico City11:35 AM–12:00 PM Resources for Orthopaedic Surgeons Interested in Getting Involved How Can POGO Help You! Panel Discussion: EricFornari,MD  MichaelHeffernen,MDTHURSDAY, MAY 14, CONTINUED 2020 SYMPOSIA PROGRAM 10:00 AM–12:00 PM PEDIATRIC BONE HEALTH FOR THE ORTHOPAEDIC SURGEONCo-Chairs: Barbara Minkowitz, MD, Jenn Beck, MD, and Laura Tosi, MDThis year’s Pediatric Bone Health for the Orthopedic Surgeon Symposium will focus on the following topics: Bone health quality versus quantity including determinants of bone strength and toughness; Current bone health screening addressing work-up with consideration of labs and imaging (DEXA and QCT); Bone acquisition during childhood and adolescence including factors that affect bone mass that are nonmodiable and modiable and populations at risk for reduced bone mass; Treatment of children with fragility fractures using bone health in children with disabilities as a model for reducing fracture rates and improving quality of life in children with a primary bone disorder; Options for diagnosing, treating, and managing children at high risk for recur-rent fracture; Bone health in trauma including delayed/nonunion risk fractures in fracture patients and non-weight bearing effects on bone healing; Bone health in the young athlete and update on NSAIDS and healing; Metabolic considerations for deformity correction, regenerate consolidation/osteotomy healing. We will conclude with a review of evidence-based protocols for supple-mentation and a Q&A panel session. 10:00 AM–10:02 AM Welcome BarbaraMinkowitz,MD10:02 AM–10:22 AM Bone Health: Quality vs. Quantity AlessandraCarriero,PhD10:22 AM–10:32 AM Bone Acquisition During Childhood & Adolescence L.ReidBoyceNichols,MD10:32 AM–10:47 AM Treating Children with Fragility Fractures LauraTosi,MD10:47 AM–11:00 AM Q&A Session with Panel 11:00 AM–11:08 AM Bone Health in Trauma ChristenRusso,MD11:08 AM–11:18 AM Bone Health in the Young Athlete JennBeck,MD11:18 AM–11:33 AM Metabolic Considerations for Deformity Correction ChristopherIobst,MD11:33 AM–11:43 AM Protocols for Supplementation JulieSamora,MD11:43 AM–12:00 PM Q&A Session with Panel

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EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG192020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDPRACTICE MANAGEMENTENHANCING PRACTICE AND PROFESSIONAL DEVELOPMENTCo-Chairs: Wade Shrader, MD and Pooya Hosseinzadeh, MDThis year’s Practice Management Symposium will address the common challenges in the busy practice of a pediatric orthopedic surgeon. The rst part of the symposium will provide attendees with an update on coding and billing for 2020 and the second half is dedicated to professional and practice development across the career span. The novel and broad topics covered in this symposium will be of interest to pediatric orthopedic surgeons in a variety of practice settings and across the career span. Experts will share their knowledge and personal experience on the topics and open discussion is encouraged. CODING AND BILLING UPDATE10:00 AM-10:05 AM Welcome WadeShrader,MD10:05 AM-10:20 AM Proposed E&M Coding Changes DaleBlasier,MD,BrienRabenhorst,MD10:20 AM-10:30 AM Fracture Billing KevinNeal,MD10:30 AM-10:45 AM Shared Billing with- PA/NP AlfredAtanda,MD10:45 AM-11:00 AM Panel Q&APROFESSIONAL AND PRACTICE DEVELOPMENT11:00 AM- 11:10 AM Balancing Academic Advancement and Productivity John(Jack)Flynn,MD11:10 AM-11:30 AM Value of MPH/MBA MininderKocher,MD,MPH,  LawsonCopley,MD,MBA11:30 AM-11:40 AM How to Foster/Integrate Junior Partners  JohnLubicky,MD,DanielGrant,MD11:40 AM-11:50 AM Negotiations – How to be Your Own Advocate MikeJofe,MD11:50 AM-12:00 PM Panel Q&ATHURSDAY, MAY 14, CONTINUED POPS THE PHYSIS: FROM BASIC BIOLOGY TO ADVANCED SURGICAL INTERVENTIONCo-Chairs: Jessica Staschak, CPNP and Ray Kleposki, CPNPThe symposium will start with a discussion of the basic biology of the physis and fracture repair. The second talk will focus on genetic and traumatic diagnoses that impact the physis. The nal talk will discuss surgical interventions to address a multitude of physeal issues and injuries. Each speaker will be given 30 min-utes to present their talks. At the end of the talks there will be a speaker panel for a question & answer session. POPS committee members will provide cases of interest for discussion. 10:00 AM-10:04 AM Introduction10:04 AM-10:34 AM Physeal Biology and Fracture Repair JonathanSchoenecker,MD,PhD10:38 AM–11:08 AM Genetic and Traumatic Diagnoses that Impact the Physis JorgeFabregas,MD11:12 AM–11:42AM Surgical Intervention to Address Physeal Pathology DavidPodeszwa,MD11:45 AM–12:00 PM Panel & Case Discussions

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202020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeTHURSDAY, MAY 14, CONTINUED RESEARCHCo-Chairs: A. Noelle Larson, MD, Matt Oetgen, MD, and Jonathan Schoenecker, MD, PhDIn this symposium, we will hear from successful POSNA-funded researchers regarding study outcomes. Further, we will discuss whether POSNA should develop a research agenda and what POSNA’s role should be regarding intellectual property devel-oped from grants. 10:00 AM–10:30 AM Reports from POSNA-funded Research Grants10:30 AM–10:45 AM Intellectual Property and the Role of POSNA PRO: StevenFrick,MD CON: BenAlman,MD10:45 AM–10:55 AM Update on Regarding Approvals for Medical Devices in Children, Real World Data, and Approaches to Post-Mark Surveillance VincentDevlin,MD10:55 AM–11:05 AM Panel Discussion  StevenFrickMD,BenAlman,MD, PatrickCahill,MD,VincentDevlin,MD11:05 AM–11:15 AM Are We Spending Wisely? Impact of POSNA Grants on Scholarly Productivity and Future Funding Success PaulSponseller,MD,FAAOS11:15 AM–11:30 AM Should There Be a Research Agenda for POSNA? PRO: JonathanSchoenecker,MD,PhD CON: LoriKarol,MD11:30 AM–11:40 AM Small Group Brainstorming with Response Cards and Panel Discussion JonathanSchoenecker,MD,PhD, LoriKarol,MD,PaulSponseller,MD,FAAOS, UnniNarayanan,MSc,MBBS,FAAOS,FRCSC11:40 AM–12:00 PM Reports from additional POSNA Grants QVSI, MicrograntsTRAUMA: DISASTER RESPONSE FOR THE PEDIATRIC ORTHOPAEDIC SURGEONCo-Chairs: Chris Souder, MD, Stephanie Holmes, MD and Mark Sinclair, MDThis year’s Trauma Symposium is focused on aspects of disaster response and mass casualty care that impact pediatric orthopaedic surgeons. We will review what care will need to be provided to pediatric patients in these circumstances and what government regulatory agencies expect from trauma centers. We will review past disasters in the United States, discuss what went well and what did not, and discuss how to use simulation in preparation for disasters that are most likely to affect your hospital and com-munity. We will discuss international disaster response using knowledge gained from the Haitian earthquake of 2010. We will then conclude by reviewing how course participants can prepare themselves, their departments and hospitals, and their community in providing a well-organized and effective disaster response. 10:00 AM–10:10 AM Pediatric Mass Casualty Care Considerations MarkSinclair,MD10:10 AM–10:20 AM Joint Commission and Centers for Medicare and Medicaid Services: Why They Care About This Topic and What Are the Rules in 2020 SusanScherl,MD10:20 AM–10:35 AM Standards of Care in a Crisis-What You Need to Know and Do  RobertWineld,MD10:35 AM–10:40 AM Questions and Discussion Moderator: StephanieHolmes,MD10:40 AM–10:50 AM Boston Marathon Bombing: What Worked and What Didn’t BenjaminShore,MD,MPH,FRCSC10:50 AM–11:00 AM Hurricane Katrina: What Worked and What Didn’t RaoulRodriguez,MD11:00 AM–11:10 AM School Shootings: Columbine, Sandy Hook, and Parkland: What Have We Learned? StephanieHolmes,MD11:10 AM–11:20 AM Mass Casualty Simulations: Best Ways to Prepare for Disaster RobertWineld,MD11:20 AM–11:25 AM Questions and Discussion Moderator: MarkSinclair,MD11:25 AM–11:40 AM 2010 Haiti Earthquake: Disaster Response Goes International ScottNelson,MD11:40 AM–11:45 AM: Questions and Discussion Moderator: ChrisSouder,MD11:45 AM–11:51 AM Preparing Yourself, Your Department, and Your Hospital to Provide a Well-Organized Disaster Response ChrisSouder,MD11:52 AM–12:00 PM Community and Regional Considerations in Disaster Response Preparedness RobertWineld,MD

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EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG212020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDFRIDAY, MAY 15, 2020 CLINICAL AWARDS SESSIONModerator: Michael Vitale, MD, MPHeModerator: Coleen Sabatini, MD, MPH7:15 AM–7:19 AM Welcome Remarks 567:20 AM–7:25 AM Long-Term Outcomes of Closed Reduction and Open Reduction with Innominate Osteotomy for Developmental Dislocation of the Hip: 45 Years at Two Institutions ElizabethScott,MD;Stuart Weinstein, MD;  LoriDolan,PhD UniversityofIowa,IowaCity,IA 7:26 AM–7:31 AM Discussion 577:32 AM–7:37 AM A Postoperative Protocol Reduces Opioids Prescribed after Pediatric Orthopaedic Surgery KirstenRoss,MD;JosephGibian,BS; JeffreyMartus,MD;DavidJohnson,MD;Megan Johnson, MD VanderbiltUniversityMedicalCenter, Nashville,TN 7:38 AM–7:43 AM Discussion 587:44 AM–7:49 AM Probability Analysis of Sequential SCFE (PASS Score) BaruchDanino,MD;SatbirSingh,BS; JunxinShi,MD,PhD;JingzhenYang,MD,PhD; Kevin Klingele, MD NationwideChildren’sHospital, Columbus,OH 7:50 AM–7:55 AM Discussion 597:56 AM–8:01 AM Marijuana Use Results in Increased Time to Union in Surgically Treated Pediatric Fracture Patients DavidHeath,MD;JamesMiller; CalebDavis,BS;LyndaLee,BS; RoseAnnHuynh;KushShah,PhD; Grant Hogue, MD UniversityofTexasHealthScienceCenteratSanAntonio,SanAntonio,TX 8:02 AM–8:07 AM Discussion

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222020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeFRIDAY, MAY 15, CONTINUED 608:08 AM–8:13 AM A Multicenter Study of Intramedullary Rodding in Osteogenesis Imperfecta Peter Smith, MD;  MercedesRodriguezCelin,MD; KarenKruger,PhD;AngelaCaudill,MPT; GeraldHarris,PhD ShrinersHospitalforChildren,Chicago,IL 8:14 AM–8:19 AM Discussion 618:20 AM–8:25 AM Ultrasonic Bone Scalpel (USBS) Does Not Reduce Blood Loss in Adolescent Idiopathic Scoliosis (AIS): Randomized Clinical Trial Sumeet Garg, MD;JamesThomas,MD;HannahQuick,BA;PatrickCarry,MS; EunKim,BA;MarkErickson,MD Children’sHospitalColorado,Aurora,CO 8:26 AM–8:31 AM Discussion 628:32 AM–8:37 AM Hunger Games: Impact of Fasting Guidelines for Orthopaedic Procedural Sedation in the Pediatric Emergency Department (PED) Jeffrey Sawyer, MD;RobertStewart,MD;CarsonStrickland,MD;RudyKink,MD; PadamKumar,BS;BusraGungor,BA; DerekKelly,MD CampbellClinicOrthopaedics, Memphis,TN 8:38 AM–8:43 AM Discussion 638:44 AM–8:49 AM Do Routine Nutrition Consults for Neuromuscular Scoliosis Help the Patient or Just the Rankings? KavishGupta,BA;DavidSkaggs,MD,MMM; StephenStephan,MD; KennethIllingworth,MD; Lindsay Andras, MD Children’sHospitalLosAngeles, LosAngeles,CA 8:50 AM–8:55 AM Discussion 648:56 AM–9:02 AM Prospective Randomized Controlled Trial of Implant Density in AIS: Results of the Mini-mize Implants Maximize Outcomes Study A. Noelle Larson, MD;DavidPolly; PaulSponseller,MD,FAAOS;  B.StephensRichards,MD;SumeetGarg,MD; HubertLabelle,MD;StuartWeinstein,MD;SukenShah,MD;CharlesCrawford,MD;MatthewOetgen,MD;JamesSanders,MD;NicholasFletcher,MD; LaurelBlakemore,MD;MichaelKelly,MD;AnnBrearley,PhD;MarkErickson,MD; StefanParent,MD;Carl-EricAubin,PhD;DanielSucato,MD,MS UniversityofMinnesota,Minneapolis,MN 9:03 AM–9:08 AM Discussion 659:09 AM–9:14 AM Effect of Reducing Urban Speed Limit on Pedestrian Collisions: A Controlled Study Andrew Howard, MD;LirazFridman,PhD;LindaRothman,PhD;BrentHagel,PhD;MarieSoleilCloutier,PhD; ColinMacarthur,MBBS HospitalforSickChildren,Toronto,Ontario,Canada 9:15 AM–9:20 AM Discussion 9:25 AM–9:45 AM Break

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EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG232020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUED7010:19 AM–10:23 AM Intraosseous BMP2-Hydrogel Injection Using Multi-needles Improves Homogenous Bone Formation While Avoiding Heterotopic  OssicationinaPigletModelofLegg-Calve-Perthes Disease (LCPD) MinsungPark,PhD;YinshiRen,PhD; ChiMa,PhD;FelipeMonte,MD; VishalGokani,BS;XiaohuaLiu,PhD; Harry Kim, MD TexasScottishRiteHospitalforChildren,Dallas,TX 7110:24 AM–10:28 AM Reverse Dynamizaton Accelerates Bone Healing in a Large Animal Osteotomy Model Christopher Iobst, MD;  MikhailSamchukov,MD; AlexanderCherkashin,MD;VaidaGlatt;SatbirSingh,BS NationwideChildren’sHospital, Columbus,OH 10:29 AM–10:37 AM Discussion 10:40 AM-10:55 AM Distinguished Achievement Award BehroozAkbarnia,MD 10:56 AM-11:03 AM 2021 Meeting Announcements DanielSucato,MD 11:04 AM-11:24 AM Presidential Speaker LoriKarol,MD 11:25 AM-11:35 AM Presidential Transfer FRIDAY, MAY 15, CONTINUED BASIC SCIENCE AWARDS SESSIONModerator: Michelle Caird, MDeModerator: Nancy Miller, MD669:50 AM–9:54 AM Timing is Everything: Optimizing a Novel Pharmacologic Therapy for Contracture Prevention in Neonatal Brachial Plexus Injury QingnianGoh,PhD;AthanasiaNikolaou,PhD; KrittonShay-Winkler;Roger Cornwall, MD CincinnatiChildren’sHospitalMedical Center,Cincinnati,OH 679:55 AM–9:59 AM Collagen X Biomarker (CXM) is Predictive of Growth Cessation in Idiopathic Scoliosis Michelle Welborn, MD;RyanCoghlan;SusanSienko,PhD;WilliamHorton,MD ShrinersHospitalforChildren,Portland,OR 6810:00 AM–10:04 AM Can Bisphosphonates Prevent Osteotomy Repair? Jonathan Schoenecker, MD, PhD;  StephanieMoore;SamuelPosey,MD; MasanoriSaito,MD VanderbiltUniversityMedicalCenter, Nashville,TN 10:05 AM–10:13 AM Discussion 6910:14 AM–10:18 AM Sirt6 in Osteoblast/Osteocyte is Vital to Prevent Bone Deformity Induced by Ischemia Through Targeting VDR-RANKL Signaling Young-JaeMoon;SungIlWang,MD; Jung-Ryul Kim, MD ChonbukNationalUniversity,Jeonju, Jeollabuk-do,RepublicofKorea

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242020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeFRIDAY, MAY 15, CONTINUED 2020 SUBSPECIALTY DAY 1:40 PM–3:20 PM HANDCo-Chairs: Claire Manske, MD and Lindley Wall, MDConditions of the pediatric upper limb span from congenital to traumatic presentations creates challenging and at times contro-versial treatment approaches. This session will include presenta-tion of six chosen abstracts, followed by discussion. Subsequently, four case presentations of interesting pediatric upper extremity cases will be presented – ranging from the shoulder to the ngers – followed by a lively discussion of treatment approaches by the expert panel. Pre-operative assess-ment, surgical technique, and pure opinion (somewhat literature based) will be discussed and debated. 721:40 PM–1:44 PM Trapezius Muscle Activity in Children and Adolescents with Chronic Obstetrical Brachial Plexus Birth Palsy JasmineLin;AlexLin;BrittanyWard; GromitYeuk-YinChan,BS; ClaudioSilva,PhD; LuisGustavoNonato,PhD; PreetiRaghavan,MD; AleksandraMcGrath,MD;Alice Chu, MD RutgersNewJerseyMedicalSchool, Newark,NJ 731:45 PM–1:49 PM Contractures in Brachial Plexus Birth Injury Are a Problem of Muscle Length, not Muscle Strength: Translating Findings from an Animal Model to Humans AthanasiaNikolaou,PhD;JasonLong,PhD;KendraEckstein,BS;Roger Cornwall, MD CincinnatiChildren’sHospitalMedical Center,Cincinnati,OH 741:50 PM–1:54 PM Carpal Tunnel Syndrome in Mucopolysaccharidosis Type II [Hunter Syndrome] and the Effect of Enzyme Replacement Therapy Benan Dala-Ali, FRCS (Ortho);  ShivanJassim,MBBS;AlexiosIliadis,MBBS;VasilikiTsiokou,MBBS; DeborahEastwood,FRCS GreatOrmondStreetHospital,London,UnitedKingdom 1:55 PM–2:04 PM Discussion SUBSPECIALTY DAY752:05 PM–2:09 PM A Comparative Analysis of 150 Thumb Polydactyly Cases Using the Wassel-Flatt, Rotterdam,andChungClassications Charles Goldfarb, MD;ElizaThompson,BS; DeborahBohn,MD;JulieAgel,ATC; AndreaBauer,MD;CarolineHu,MD; AmyMoeller,MD;SusanNovotny,MA; AnnVanHeest,MD GilletteChildren’sSpecialtyHealthcare,Minneapolis,MN 762:10 PM–2:14 PM Association of Radial Longitudinal  DeciencyandThumbHypoplasia: An Update Using the Congenital Upper Limb Differences (CoULD) Registry Michelle James, MD;MalkaForman,BS;MariaCanizares,MD;DeborahBohn,MD;JulieSamora,MD;SuzanneSteinman; LindleyWall,MD;AndreaBauer,MD BostonChildren’sHospital,Boston,MA 772:15 PM–2:19 PM Functional Workspace of Reconstructed Hypoplastic Thumbs Patrick Curran, MD;MadeleineBall,BS;AnitaBagley,PhD;MaryManske,MD; LauraLewallen,MD; MitellSison-Williamson,MS; MichelleJames,MD ShrinersHospitalsforChildrenNorthernCalifornia,Sacramento,CA 2:20 PM–2:29 PM Discussion 2:30 PM–3:20 PM Cases/Didactics Moderators: Claire Manske, MD Lindley Wall, MD Panel: Kevin Little, MD Apurva Shah, MD2:30 PM–2:42 PM Case 1 and Discussion 6 year-old child with bilateral radial longitudinal deciency, with a type 2 hypoplastic thumb and a unclassiable thumb. Discussion of surgical approach and favored techniques. 2:42 PM–2:54 PM Case 2 and Discussion 3 year-old with birth brachial plexus palsy glenohumeral dysplasia and limited function. Discuss surgical considerations, functional implications, and expected long term outcome.

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25EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDFRIDAY, MAY 15, CONTINUED 2:54 PM–3:06 PM Case 3 and Discussion 7 year-old with spastic hemiplegia. Address approach to assessment, clinic set-up, and surgical options to improve function and cosmesis. 3:06 PM–3:18 PM Case 4 and Discussion 14 year-old with medial epicondyle non-union. Work through treatment options and subsequent complications; discuss ap-proach to optimizing motion and function through surgical decision making. 3:25 PM–3:45 PM Break FOOT/ANKLECo-Chairs: Derek Kelly, MD and Jennifer Laine, MD3:50 PM–5:30 PM To Fuse or Not To Fuse?As pediatric orthopaedic surgeons, our treatment goals often involve maximizing long-term function and minimizing pain. Arthrodesis in the pediatric or adolescent foot and ankle has the risk of stiffness, early degeneration of neighboring joints, and pain. Unfortunately, in some cases, joint sparing procedures either do not give adequate correction or allow for early recur-rence. In this year’s Foot and Ankle symposium, “To Fuse or Not to Fuse?,” we will focus on the complexity of this decision-making process. Our foot and ankle specialists, through a case-based approach, will illustrate when joint-sparing surgery should be employed, and when it is time to proceed with arthrodesis. Our experts will highlight their indications, treatment algorithms and surgical techniques for fusions in the foot. They will then demon-strate this approach through discussion and debate over case examples, and audience participation will be encouraged. At the end of this session:1. The attendee will gain a better understanding of the appropriate indications for hindfoot and forefoot fusions2. The participant will learn arthrodesis surgical technique pearls and potential pitfalls3. The attendee will be able to explain the potential risks associated foot arthrodesis, especially when poorly indicated783:50 PM–3:54 PM The Development of a Clubfoot Outcome Score for Ponseti Treated Idiopathic Clubfeet: Results of a Pilot Study with 40 Unilateral Clubfeet ChristineDouglas,CPS;RoisinDelaney; NeilSegaren,FRCS(Ortho); MattThornton;Sally Tennant, MD RoyalNationalOrthopaedicHospital, Stanmore,UK,UnitedKingdom 793:55 PM–3:59 PM Pedobarographic and Ankle Kinematic Analyses of Idiopathic Clubfoot after a Soft Tissue Release Procedure Noppachart Limpaphayom, MD FacultyofMedicine,Chulalongkorn University,Bangkok,Thailand 804:00 PM–4:04 PM Functional Implications of the Flat-Topped Talus Following Treatment of Idiopathic Clubfoot Deformity MatthewSiebert,BS;JacobZide,MD; ClaireShivers,BS; KirstenTulchin-Francis,PhD; WilshawStevens,BS; JustineBorchard,BS;Anthony Riccio, MD TexasScottishRiteHospitalforChildren, Dallas,TX 4:05 PM–4:14 PM Discussion 814:15 PM–4:19 PM Do We Really Need to Worry About Calcaneocuboid Subluxation During Lat-eral Column Lengthening for Planovalgus Foot Deformity? Brittany Hedrick, MD;JacobZide,MD; DanielleThomas,MD;ClaireShivers,BS;MatthewSiebert,BS;WilliamPierce; MitchellHarris,MD;AnthonyRiccio,MD TexasScottishRiteHospitalforChildren,Dallas,TX 824:20 PM–4:24 PM RedeningtheJuvenileBunion CaitlinHardin,DO;JacobZide,MD; ClaireShivers,BS; KirstenTulchin-Francis,PhD;  Chan-HeeJo,PhD;Anthony Riccio, MD TexasScottishRiteHospitalforChildren,Dallas,TX SUBSPECIALTY DAY

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262020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeFRIDAY, MAY 15, CONTINUED 834:25 PM–4:29 PM Proximal Fifth Metatarsal Fracture Review and Healing Outcomes HannahLee;MatthewBuczek,BS; DivyaTalwar,MPH;BernardHorn,MD; Richard Davidson, MD Children’sHospitalofPhiladelphia, Philadelphia,PA 4:30 PM–4:39 PM Discussion 4:40 PM–4:50 PM To Fuse or Not to Fuse? The Limits of Joint Sparing in Hindfoot Deformities MaryseBouchard,MD4:51 PM–5:01 PM To Fuse or Not to Fuse? The Forefoot MichaelConklin,MD5:02 PM–5:30 PM Case Presentations Moderators: Derek Kelly, MD Jennifer Laine, MDThe moderators will present four or ve foot and ankle cases, encouraging the experts to discuss their approaches to manage-ment, their concerns and their expected outcomes. The audience will be encour-aged to weigh in on these discussions, both through dialogue and questions. Panel: Maryse Bouchard, MD Michael Conklin, MD HIPCo-Chairs: Travis Matheney, MD and Rachel Goldstein, MD1:40 PM–5:30 PM This session will have two aims. The rst will be to provide a com-prehensive overview of how we assess hip cartilage and arthrosis in preservation surgery. We will be discussing the latest updates in imaging, bio markers, and biologics. Experts in the eld will review the latest developments and discuss their applicability to difcult to manage hip preservation cases. The second aim will be to address the use of ultrasound imaging in the infant hip, both in and out of the operating room. We will focus on how ultrasound may improve our ability to assess hip reductions and perfusion in the operating room, as well as how to include it in your clinical practice. 841:40 PM–1:44 PM Development and External Validation of a Novel Clinical Score to Quantify the Presence of Instability Characteristics in Patients with Borderline Acetabular Dysplasia MariaSchwabe,BS;ElizabethGraesser,MD; LeeRhea,PhD;CeciliaPascual-Garrido,MD; ANCHORStudyGroup;JohnClohisy,MD;Jeffrey Nepple, MD WashingtonUniversityDepartmentof OrthopaedicSurgery,SaintLouis,MO 851:45 PM–1:49 PM ModiedDunnProcedureforStableSlipped Capital Femoral Epiphysis (SCFE) – 100 Cases with a Minimum of 1-Year Follow-up Oliver Birke, FRACS;JustineStGeorge,MBBS;  PaulGibbons,MBBS; DavidLittle,MBBS,FRACS,PhD TheChildrensHospitalatWestmead, Sydney,NSW,Australia 861:50 PM–1:54 PM Borderline Acetabular Dysplasia: Three-Dimensional Deformity Predictors of the Diagnosis of Symptomatic Instability Treated with Periacetabular Osteotomy John Clohisy, MD;ElizabethGraesser,MD;MariaSchwabe,BS; CeciliaPascual-Garrido,MD; JeffreyNepple,MD WashingtonUniversitySchoolofMedicine,SaintLouis,MO 1:55 PM–2:04 PM Discussion SUBSPECIALTY DAY

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27EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDFRIDAY, MAY 15, CONTINUED 872:05 PM–2:09 PM FAI Surgery in the Adolescent Patient Population: Mild Deformities and Lack of Sports Participation are Associated with an Increased Risk of Treatment Failure Yi-Meng Yen, MD;JeffreyNepple,MD; IraZaltz,MD;DavidPodeszwa,MD; ErnestSink,MD;YoungJoKim,MD; DanielSucato,MD,MS;ANCHORStudyGroup;JohnClohisy,MD WashingtonUniversitySchoolofMedicine,SaintLouis,MO 882:10 PM–2:14 PM Increased Biomarker Levels of CartilageBreakdownandInammation are Present in Patients with Stable Slipped Capital Femoral Epiphysis DevonNixon,MD; PerrySchoenecker,MD; CraigSmith,MD;MeghanMerklein,MD;  JohnClohisy,MD;Jeffrey Nepple, MD WashingtonUniversitySchoolof Medicine,SaintLouis,MO 892:15 PM–2:19 PM Do Weight-Bearing and Activity Restriction Treatments Affect Health-Related Quality of Life Measures in Patients with Legg-Calvé-Perthes Disease (LCPD)? Dang-HuyDo,BA;MollyMcGuire; Chan-HeeJo,PhD;Harry Kim, MD TexasScottishRiteHospitalfor Children,Dallas,TX 2:20 PM–2:29 PM Discussion 2:30 PM–3:20 PM The Future of Arthrosis in Hip Preservation Surgery RachelGoldstein,MD2:30 PM–2:32 PM Introduction RachelGoldstein,MD 2:33 PM–2:39 PM What’s New in Imaging StephaniePun,MD2:40 PM–2:46 PM What’s New in Biomarkers JeffreyNepple,MD2:47 PM–2:53 PM What’s New in Biologics JonathanSchoenecker,MD,PhD2:54 PM–3:20 PM Panel Case Discussion Panel: JeffreyNepple,MD  StephaniePun,MD  JonathanSchoenecker,MD,PhD 3:25 PM–3:45 PM Break 903:50 PM–3:54 PM MRI Assessment of Inverted Labrum Following Closed Reduction of DDH After Femoral Head “Docking” Zhe Fu, MD;JianpingYang,MD; ZhongliZhang DepartmentofPediatricOrthopedics, TianjinHospital,TianjinCity, People’sRepublicofChina 913:55 PM–3:59 PM MRI Hip Morphology is Abnormal in Unilateral DDH and Increased Asymmetric Lateral Cartilage Thickness is Associated with Residual DDH at Minimum 10-Year Followup: A Proof of Concept Study FlorianSchmaranzer,MD; MarianaFerrer,MD;YoungJoKim,MD; PatriciaMiller,MS;JenniferKallini; PedroJusto,MD;Eduardo Novais, MD BostonChildrensHospital,BostonMA 924:00 PM–4:04 PM VericationofHipReductionUsingMedialUltrasound in Spica Cast Treatment for Developmental Dysplasia of Hip Gang Fu, MD BeijingJishuitanHospital,Beijing, People’sRepublicofChina 4:05 PM–4:14 PM Discussion 934:15 PM–4:19 PM Investigating the Radiation Risk from Repeated Pelvic Imaging in Developmental Dysplasia of the Hip Alexander Aarvold, FRCS (Ortho);  ElizabethVogel;TomLeaver,MBBS; JamesLampard,BS;BenJohnson,BS; MikeUglow,FRCS(Ortho) SouthamptonChildren’sHospital, Southampton,UnitedKingdom SUBSPECIALTY DAY

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1:40 PM–3:20 PM 282020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeFRIDAY, MAY 15, CONTINUED 944:20 PM–4:24 PM Comparative Evaluation of Perioperative Continuous Epidural Versus Continuous Lumbar Plexus Block for Complex Hip Surgeries in Children: A Retrospective Review Mihir Thacker, MD;  DineshK.Choudhry,MD;KarenSacks; BruceR.Brenn,MD AlfredI.duPontHospitalforChildren, Wilmington,DE 954:25 PM–4:29 PM Single-Incision Triple Innominate Osteotomy: Outcomes of an Updated Technique Wudbhav (Woody) Sankar, MD;  IraZaltz,MD Children’sHospitalofPhiladelphia, Philadelphia,PA 4:30 PM–4:39 PM Discussion 4:40 PM–5:30 PM Infant Hip Imaging TravisMatheney,MD 4:40 PM–4:42 PM Introduction TravisMatheney,MD4:43 PM–4:50 PM PotentialUsesandEfcacyofInClinicUltrasound PabloCasteñeda,MD4:51 PM–4:58 PM Assessing Infant Hips After Operative Reduction SuzannedeVos-Jakobs,MD4:59 PM–5:06 PM How Do We Assess Hip Perfusion After Infant Hip Reduction TravisMatheney,MD5:07 PM–5:14 PM Why Do We Bother to Assess Hip Perfusion? Don’t Most Cases Do Okay In the Long Run VidyadharUpasani,MD5:15 PM–5:30 PM Questions/Discussion LOWER EXTREMITYCo-Chairs: Chris Iobst, MD and Phil McClure, MDThis session will be a mixture of scientic papers, debates and panel discussion regarding lower extremity deformity issues. The debate will attempt to answer the question of whether excision of a physeal bar should be attempted or not. A panel of experienced limb deformity surgeons will provide an update on the current techniques for surgical management tibial deformity using plates, nails, and external xators. 961:40 PM–1:44 PM Explanted PRECICE Magnetic Limb Lengthening Nails: Can They Be Reactivated? HadyEltayeby,MBChB;HamzaAlrabai,MD;John Herzenberg, MD RubinInstituteforAdvancedOrthopedics,SinaiHospitalofBaltimore,Baltimore,MD 971:45 PM–1:49 PM Metallosis in PRECICE Nail Implants: An Endoscopic, Histologic, and Explanted Nail Analysis KyleMiller,MD;MelihEriten,PhD; LejieLiu,PhD;AhmetDenizUsta,PhD;ShixuanChen;DaryaBuehler,MD; Ken Noonan, MD, FAAOS TheUniversityofWisconsin,Madison,WI 981:50 PM–1:54 PM Does Plate Position Affect Sagittal Alignment of Distal Femur During Growth Tethering Surgery? Wang Chun-Chieh, MD;Kuan-WenWu,MD; Ting-MingWang,MD;KenKuo,MD NationalTaiwanUniversityHospital, Taipei,Taiwan 1:55 PM–2:04 PM Discussion 992:05 PM–2:09 PM Medial Metaphyseal Beak Angle as a Predictor for Langenskiold Stage II of Blount’s Disease Jidapa Wongcharoenwatana, MD;  ThanaseAriyawatkul,MD SirirajHospital,MahidolUniversity, Bangkok,Thailand SUBSPECIALTY DAY

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29EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDFRIDAY, MAY 15, CONTINUED 1002:10 PM–2:14 PM Depression of the Medial Tibial Plateau in Infantile Blount Disease: Can Pathologic Bony Changes be Reversed with Guided Growth Treatment? ReginaHanstein,PhD; ChristopherSchneble,MD;JacobSchulz;AdrienneSocci,MD;Melinda Sharkey, MD MonteoreMedicalCenter/AlbertEinsteinCollegeofMedicine,Bronx,NY 1012:15 PM–2:19 PM Correction of Mild/Moderate Arthrogrypotic Knee Flexion Contractures with Guided Growth Harold Van Bosse, MD ShrinersHospitalforChildren, Philadelphia,PA 2:20 PM–2:29 PM Discussion 2:30 PM–3:20 PM Case/DidacticsDebate: Physeal Bar Excision: Is it Necessary2:30 PM–2:35 PM PRO: WilliamShaughnessey,MD   MayoClinic2:36 PM–2:41 PM CON: JohnBirch,MD,FRCSC   TexasScottishRite2:42 PM–2:52 PM DiscussionCase Discussion: Surgical Approach for Tibial Deformity2:53 PM–2:58 PM Osteotomy and Plating MarkDahl,MD  GilletteChildren’sHospital2:59 PM–3:04 PM Osteotomy and Nailing ChristopherIobst,MD  NationwideChildren’sHospital3:05 PM–3:10 PM Osteotomy and External Fixation SimonKelley,MBChB,FRCS  SickKids,Toronto,ONCanada 3:10 PM–3:20 PM Discussion 3:25 PM–3:45 PM Break SUBSPECIALTY DAYNEUROMUSCULARCo-Chairs: Vineeta T. Swaroop, MD and Andrew Georgiadis, MD3:50 PM–5:30 PM This session will be a mixture of scientic papers, debates and discussion regarding neuromuscular orthopaedics, with a focus on treatment of patients with greater motor disability. The debate will focus on unilateral versus bilateral proximal femoral surgery for hip subluxation in non-ambulatory patients with cerebral palsy. Other presentations will focus on difcult complications of prox-imal femoral surgery, a review of publications that may change your practice, discussion of patient reported outcomes, and pre-operative optimization of high-risk patients.Moderators: Andrew Georgiadis, MD and Vineeta T. Swaroop, MD1023:50 PM–3:54 PM Long Term Outcomes of Ambulatory Function in Adults with Cerebral Palsy: Evaluating Change from Adolescence Michael Shrader, MD;NancyLennon,PT;ChrisChurch,PT;WilliamRobinson; JoseSalazar-Torres,PhD;JohnHenley,PhD;TimothyNiiler,PhD;JasonHoward,MD;FreemanMiller,MD NemoursduPontHospitalforChildren,Wilmington,DE 1033:55 PM–3:59 PM Single Event Multilevel Surgery in Cerebral Palsy: Value Added by a Co-Surgeon Nickolas Nahm, MD;MerylLudwig,MD; FreemanMiller,MD;RachelThompson,MD; KennethRogers,PhD;JulieanneSees,DO Nemours/AIduPontHospitalforChildren,Wilmington,DE 1044:00 PM–4:04 PM Remodeling of Femoral Head Deformity After Hip Reconstructive Surgery In Patients with Cerebral Palsy JaeJungMin,MD;SoonsunKwon,PhD; KiHyukSung,MD;KyoungMinLee,MD;ChinYoubChung,MD; Moon Seok Park, MD SeoulNationalUniversityBundangHospital,Sungnam,RepublicofKorea 4:05 PM–4:14 PM Discussion

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302020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeFRIDAY, MAY 15, CONTINUED 1054:15 PM–4:19 PM Clinical Outcomes of the Triple C Osteotomy for the Treatment of Pediatric Neuromuscular Foot Deformity: A Single Center, Retrospective Study IanHollyer;DerekHesse,BS; Jill Larson, MD Ann&RobertH.LurieChildren’sHospitalofChicago,NorthwesternUniversityFeinbergSchoolofMedicine,Chicago,IL 1064:20 PM–4:24 PM Botulinum Toxin and Casting may Delay or Prevent Surgery in Spastic Hemiplegic Cerebral Palsy Robert Wimberly,MD;AnthonyRiccio,MD;StephenGates,MD;JonathanVanPelt,BA;MauricioDelgado,MD TexasScottishRiteHospital,Dallas,TX 1074:25 PM–4:29 PM Survivorship of Gastrocnemius Soleus Fascial Lengthening (GSFL) for Equinus in Ambulatory Cerebral Palsy (CP): Factors Affecting Success in Long Term Follow-up Kristen Carroll, MD;EmmaNaatz; AlanStotts,MD;BruceMacWilliams; SierraPond,BS ShrinersHospitalforChildren-SaltLakeCity,SaltLakeCity,UT 4:30 PM–4:39 PM Discussion 4:40 PM–5:30 PM DidacticsModerators: Andrew Georgiadis, MD and Vineeta T. Swaroop, MD4:40 PM–4:59 PM Debate: Spastic Hip Subluxation (in GMFCS IV and V): Unilateral vs Bilateral VDRO? Unilateral – LoriKarol,MD Bilateral – BobKay,MD Discussion5:00 PM–5:06 PM Removal of Proximal Femoral Implants - Should This Be Routine and How to Manage Peri-implant Fracture WalterTruong,MD5:07 PM–5:12 PM Publications This Year that Might Change your Practice PooyaHosseinzadeh,MD5:13 PM–5:21 PM How and Which Patient Reported Outcomes to Collect in Neuromuscular Patients UnniNarayanan,MSc,MBBS,FAAOS,FRCSC5:22 PM–5:30 PM Pre-operative Optimization for Neuromuscular Surgical Patients WadeShrader,MD SPINECo-Chairs: Ron El-Hawary, MD and Sumeet Garg, MDModerators: Dan Sucato, MD and Ben Orlik, MD 1:40 PM–5:30 PM Do you feel overwhelmed by the all the new technologies offered for pediatric spinal deformity? How do you decide who will progress, who can be braced, and who should get non-fusion surgery? Your colleagues will challenge and debate dogma on natural history, non-fusion treatment, and navigation technologies.1081:40 PM–1:44 PM Safety of Pedicle Screw Placement in a Large Series of AIS Patients: Is Navigation Necessary? Daniel Sucato,MD, MS;KileyPoppino,BS TexasScottishRiteHospitalforChildren,Dallas,TX 1091:45 PM–1:49 PM Does Navigation Make Spinal Fusion for Adolescent Idiopathic Scoliosis Safer? Insights from 17,400 Cases in a National Database JapsimranKaur,BS;JaymeKoltsov,PhD;IvanCheng;John Vorhies, MD Stanford,Stanford,CA 1101:50 PM–1:54 PM Power Pedicle Tract Preparation and Screw Placement: A Multicenter Study of Early Adopters EdwardCompton,BS;LindsayAndras,MD; MichaelVitale,MD,MPH;SumeetGarg,MD; JosephStone,MD;NicholasFletcher,MD;KennethIllingworth,MD; RoxanaMartinez,BA;EunKim,BA; LukasKeil,MD;HilaryHarris,BS; David Skaggs, MD, MMM Children’sHospitalLosAngeles, LosAngeles,CA 1:55 PM–2:04 PM Discussion SUBSPECIALTY DAY

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31EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDFRIDAY, MAY 15, CONTINUED 1112:05 PM–2:09 PM Bracing Decreases Back Pain in Adolescents with Idiopathic Scoliosis Lori Dolan, PhD;KelseySheets; StuartWeinstein,MD UniversityofIowa,IowaCity,IA 1122:10 PM–2:14 PM Pregnancy Outcomes in Operative vs. Nonoperative Scoliosis Patients at Mean 30-Year Follow-Up A. Noelle Larson, MD;LaurenSwany; PawelGrabala,MD;SukenShah,MD; ToddMilbrandt,MD;MichaelYaszemski MayoClinic,Rochester,MN 1132:15 PM–2:19 PM Surgeon Volume Affects Short- and Long-term Surgical Outcomes in Idiopathic Scoliosis Alexander Satin, MD;VishalSarwahi,MD;AaronAtlas,MS;SayyidaHasan,BS; JesseGalina,BS;DeanPerfetti,MD; TerryAmaral,MD CohenChildren’sMedicalCenter, Queens,NY 2:20 PM–2:29 PM Discussion 2:30 PM–3:20 PM Case/DidacticsChallenging the Dogma of Idiopathic ScoliosisModerators: Ron El-Hawary, MD and Firoz Miyanji, MD, FRCSC 2:30 PM–2:36 PM Natural History of 35-50 Degree Curves in Idiopathic Scoliosis StefanParent,MD,PhD2:37 PM–2:43 PM Predicting Brace Success versus Failure in Idiopathic Scoliosis RonEl-Hawary,MD,FRCSC2:44 PM–2:50 PM Radiographic vs Biologic Markers for Growth Prediction in Idiopathic Scoliosis  MichelleWelborn,MD2:50 PM–2:54 PM Discussion2:55 PM–3:04 PM Vertebral Body Tethering -- How to and Early Results  KevinSmit,MD3:05 PM–3:14 PM Posterior Dynamic Deformity Correction – How to and Early Results  JeffreySawyer,MD3:15 PM–3:20 PM Discussion 3:25 PM–3:45 PM Break Moderators: Amy McIntosh, MD and Ben Roye, MD1143:50 PM–3:54 PM Using the Sanders Maturity Scale (SMS) to Predict Progression of Adolescent Idiopathic Scoliosis (AIS) in Girls: What Final Curve Size is Important? Kevin Neal, MD;GaryKiebzak,PhD Nemours,Jacksonville,FL 1153:55 PM–3:59 PM Do Patients with Anterior Vertebral Body Growth Modulation have a better Quality of Life than Patients with a Posterior Spinal Fusion? MarjolaineRoy-Beaudry,MSc; JulieJoncas,BSN;IsabelleTurgeon,BS;AbdulmajeedAlzakri,MD; Stefan Parent, MD CHUSainte-Justine, Montreal,Quebec,Canada 1164:00 PM–4:04 PM Vertebral Body Tethering: Truly Motion Preserving or Rather Motion Limiting? Firoz Miyanji, FRCSC;PaulRushton,MBBS;MatyPetcharaporn,BS;MichelleMarks,PT BritishColumbiaChildren’sHospital, Vancouver,BC,Canada 4:05 PM–4:14 PM Discussion 1174:15 PM–4:19 PM T1 Tilt and Clavicle Angle are the Best Predictors of Postoperative Shoulder Balance in AIS Patients: A Review of 347 Cases VishalSarwahi,MD;AaronAtlas,MS; JesseGalina,BS;SayyidaHasan,BS; YungtaiLo,PhD;Spencer Stein, MD;  TerryAmaral,MD CohenChildren’sMedicalCenter, Queens,NY SUBSPECIALTY DAY

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322020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeFRIDAY, MAY 15, CONTINUED 1184:20 PM–4:24 PM Bigger is Better: Larger Thoracic Height is Associated with Increased Health Related Quality of Life at Skeletal Maturity MatthewSimhon,BS;HirokoMatsumoto,MA;  SumeetGarg,MD;GregoryRedding,MD;AmerSamdani,MD;JohnSmith,MD; PaulSponseller,MD,FAAOS;  MichaelVitale,MD,MPH; Benjamin Roye, MD;  PediatricSpineStudyGroup ColumbiaUniversityMedicalCenter, NewYork,NY 1194:25 PM–4:29 PM Single Rod Constructs in Severe EOS Produce Similar Cobb Correction and Spinal Growth as Dual MCGR Constructs Scott Luhmann, MD;DavidSkaggs,MD,MMM; CharlesJohnston,MD;JoshuaPahys; JohnSmith,MD;AmerSamdani,MD; RonEl-Hawary,MD;PediatricSpineStudyGroup WashingtonUniversitySchoolofMedicine,SaintLouis,MO 4:30 PM–4:39 PM Discussion Pediatric Scoliosis DebatesModerators: Sumeet Garg, MD and Pat Cahill, MD4:40 PM–4:45 PM Navigation Improves Quality and Safety: Point JasonAnari,MD4:45 PM–4:50 PM Navigation Improves Quality and Safety: Counterpoint JenniferBauer,MD,MS4:50 PM–4:55 PM Discussion4:55 PM–5:00 PM Navigation Improves Teaching: Point A.NoelleLarson,MD5:00 PM–5:05 PM Navigation Improves Teaching: Counterpoint DominicTuasson,MD5:05 PM–5:10 PM Discussion5:10 PM–5:15 PM Bracing is as Effective as Casting for EOS: Point JohnThometz,MD5:15 PM–5:20 PM Bracing is as Effective as Casting for EOS: Counterpoint GrahamFedorak,MD5:20 PM–5:30 PM Discussion SPORTSCo-Chairs: Cordelia Carter MD and Peter Fabricant MD, MPHModerator: Cordelia Carter MD 1:40 PM–5:30 PM This session aims to provide a comprehensive approach to the management of re-tears of the ACL graft following primary ACL reconstructive surgery – one of the most difcult problems to treat in young athletes. From the epidemiology of these injuries to the preoperative assessment and intraoperative decision-making algorithms, experts in the eld will review in detail their own evidence-based approaches to the problem. Participants will leave this session with a “toolkit” of practical recommendations for incorporation into their own pediatric sports medicine practices. 1201:40 PM–1:44 PM Athlete Burnout Is Associated with Perceived Likelihood of Future Injury Among Healthy Adolescent Athletes Aaron Provance, MD;MorganPotter,BA;GregoryWalker,MD;KatherineDahab,MD;DavidHowell,ATC UniversityofColoradoDepartmentof Orthopedics,Aurora,CO 1211:45 PM–1:49 PM Pediatric Shoulder Instability and Arthroscopic Shoulder Instability Surgery Across the United States: A PHIS Database Study RyanCoene;KellyMcFarlane,BS; KathrynWilliams,MS;LannaFeldman,MS;Matthew Milewski, MD BostonChildren’sHospital,Boston,MA 1221:50 PM–1:54 PM Arthroscopic Shoulder Stabilization in High School Football Players: Recurrent Instability with Return to Contact Sport JessicaStambaugh,MD; Eric Edmonds, MD;AndrewPennock,MD RadyChildren’sHospital,SanDiego, SanDiego,CA 1:55 PM–2:04 PM Discussion 1232:05 PM–2:09 PM Pediatric Meniscus Ramp Lesions: Incidence, Risk Factors, and Magnetic Res-onance Imaging (MRI) Sensitivity Margaret Wright, MD;JoshuaBram,BS; JieNguyen,MD;TomasinaLeska,BS; JulienAoyama,BA;TheodoreGanley,MD Children’sHospitalofPhiladelphia, Philadelphia,PA SUBSPECIALTY DAY

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33EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDFRIDAY, MAY 15, CONTINUED 1242:10 PM–2:14 PM Open Osteochondral Autograft Transfer Results in More Frequent Reoperation than Open Allograft Transfer in the Pediat-ric Knee TylerHall,BA;MaxHyman; Neeraj Patel, MD Ann&RobertH.LurieChildren’sHospitalofChicago,Chicago,IL 1252:15 PM–2:19 PM Increased Tibiofemoral Rotation with Increasing Severity of Pediatric Patellar Instability Daniel Green, MD;KennethLin,MD; EvanJames,MD;AlexandraAitchison,BS;LindsaySchlichte,MS;GraceWang,BA HospitalforSpecialSurgery,NewYork,NY 2:20 PM–2:29 PM Discussion 2:30 PM–3:20 PM Case/DidacticsInstructional Course Lecture: Pediatric Revision ACL2:30 PM–2:35 PM What Do We Know About Revision ACLs in Kids? Andrew Pennock, MD 2:35 PM–2:40 PM Preoperative Evaluation: From Diagnostic Imaging to Biomechanical Assessment John Todd Lawrence, MD, PhD2:40 PM–2:45 PM Psychological Assessment and Cognitive Skills Training: Practical Applications for You and Your Patients Melissa Christino, MD2:45 PM–2:52 PM My Approach to Tunnel Management in Revision ACL Reconstruction Eric Edmonds, MD2:52 PM–2:59 PM Operative Decision-making: Graft Choice and the Role for Associated Stabilization Procedures Philip Wilson, MD3:00 PM–3:20 PM Cases and Panel Discussion 3:25 PM–3:45 PM Break Moderator: Peter Fabricant MD, MPH 1263:50 PM–3:54 PM Discoid Meniscus Repairs in Children and Adolescents: Minimum 2 Year Outcomes Crystal Perkins, MD;MichaelBusch,MD;SamuelWillimon,MD Children’sHealthcareofAtlanta, Atlanta,GA 1273:55 PM–3:59 PM Long Term Follow Up After Discoid Lateral Meniscus Preservation Surgery Mininder Kocher, MD, MPH;  LauraLins,MPH;BrianYang,MD; KathrynWilliams,MS;SarithaSankarankutty BostonChildren’sHospital,Boston,MA 1284:00 PM–4:04 PM Does Discoid Morphology Affect Performance on Return to Sport Testing After Meniscus Repair? Megan Kuba, MD;JordanSnetselaar,DPT; AndrewGupta,MD;VivianaBompadre,PhD; GregorySchmale,MD;MichaelSaper,DO SeattleChildren’sHospital,Seattle,WA 4:05 PM–4:14 PM Discussion 1294:15 PM–4:19 PM Concomitant Meniscectomy Results in Delayed Return To Sport Compared to Meniscus Repair in Primary Pediatric ACL Reconstruction Brendan Williams, MD;  MargaretWright,MD;JoshuaBram,BS;NeerajPatel,MD;TheodoreGanley,MD Children’sHospitalofPhiladelphia, Philadelphia,PA 1304:20 PM–4:24 PM Quadricep Strength in Adolescent Patients Undergoing Anterior Cruciate Ligament Reconstruction After a Femoral Nerve Versus Adductor Canal Block Paul Fleissner, MD CrystalClinicOrthopaedicCenter, Akron,OH SUBSPECIALTY DAY

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342020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeFRIDAY, MAY 15, CONTINUED 1314:25 PM–4:29 PM Comparison of 6-Month Return to Sports Testing Following ACL Reconstruction in Adolescents with Quadriceps Tendon Autograft versus Hamstring Autograft ElizabethLiotta;DaiSugimoto; KathleenMaguire,MD; MininderKocher,MD,MPH; LyleMicheli,MD;Benton Heyworth, MD BostonChildren’sHospital,Boston,MA 4:30 PM–4:39 PM Discussion 4:40 PM–5:30 PM DidacticsMasters Techniques for Patellofemoral instability: Beyond the MPFLThis Masters Techniques session will feature a wide variety of state-of-the-art approaches to the management of patellar instability in children and adolescents by leaders in the eld of pediatric sports medicine. Participants will leave this session armed with the tools to evaluate and manage patellar instability in children regardless of its etiology and the physeal status. 4:40 PM–4:45 PM Nonoperative Treatment (with an Emphasis on ‘Treatment’)… The Keys to Maximizing Success of Rehabilitation, Bracing, and Return to Play in First Time Dislocators JosephT.MolonyJr,PT,MA,SCS,CSCS4:45 PM–4:50 PM Treating Our Youngest Patients: How Studying Pediatric Knee Anatomy Has Changed My Approach to Patellofemoral Instability In Children Under 10 Years Old KevinSheaMD4:50 PM–4:55 PM Management of Coronal and Axial Bony Deformity: When and How to Treat CorinnaFranklinMD4:55 PM–5:00 PM Managing Chondral Injuries In the Setting of Patellofemoral Instability AristidesCruzMD5:00 PM–5:10 PM An Algorithmic Approach To Treating Our Most Challenging Patients: Syndromic Patellar Instability and Instability in Flexion DanielGreenMD5:10 PM–5:30 PM Cases and Panel Discussion TRAUMACo-Chairs: Mauricio Silva, MD and Mark Sinclair, MD1:40 PM–5:30 PM The Trauma Subspecialty session will consist of three different components, all of which should be of interest to pediatric ortho-paedic surgeons involved in trauma care. There will be scientic paper presentations, with our two experienced discussants leading a lively question and answer segment about the latest controver-sies in trauma care. There will also be two didactic sessions. The rst will discuss turn-ing your trauma M&M into trauma QI (Quality Improvement). This is an area that is highly stressed in ACS verication. Three specic types of complications seen in trauma care will be discussed, and applicable techniques of turning complications into improvement opportunities will be stressed.The second will discuss variations of common fracture care, high-lighting three injuries seen almost daily in a pediatric orthopaedic practice. Is this just benign practice variation or should there be more specic treatment protocols for these common injuries? As always, audience participation will be encouraged.1321:40 PM–1:44 PM Lowering the Default Dose Quantity Decreases the Number of Opioids Prescribed in the Pediatric ED Wee-JhongChua,MD; CorneliusGroenewald,MBChB; ShingVarakitsomboon,BS;JacobHarris,BS; AnnaFaino,MS;LindaQuan,MD; GaryWalco,PhD;Ted Sousa, MD SeattleChildren’sHospital,Seattle,WA 1331:45 PM–1:49 PM Demographic Changes in US Trampoline Related Injuries 1998 through 2017: Cause for Alarm Ryan Fitzgerald, MD;SerenaFreiman,BS;RobertKulwin,MD;RandallLoder,MD RileyChildren’sHospital,Indianapolis,IN 1341:50 PM–1:54 PM Predictive Factors of Reconstructive Surgery for Chronic Monteggia Fracture in Children Kyung Rae Ko, MD;JongSupShim,MD;MinkyuSeo,MD SamsungMedicalCenter,Seoul,RepublicofKorea 1:55 PM–2:04 PM Discussion SUBSPECIALTY DAY

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352020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUED2:47 PM–2:54 PM Rogue Agent or Flawed Policy/Procedure: Appropriate Management of the Provider- Caused Complication BradOlney,MD2:55 PM–3:00 PM The Systems Issue Complication: Case Presentation CarolineTougas,MD3:00 PM–3:10 PM How to Solve a Complication That Wasn’t Your Fault: Bringing the Systems Related Complication Around to Full Loop Closure StephanieHolmes,MD3:11 PM–3:20 PM Questions and Discussion CarolineTougas,MD 3:25 PM–3:45 PM Break 1383:50 PM–3:54 PM Spica Casting Results in More Unplanned Reoperations than Elastic Intramedullary Nailing: A National Analysis of Femur Fractures in the Preschool Population David Lyons, DO;KonstantinBrnjoš,BS;MaxHyman;NeerajPatel,MD Ann&RobertH.LurieChildren’sHospital ofChicago,Chicago,IL 1393:55 PM–3:59 PM Early Failure of Proximal Femoral Locking Compression Plates in Pediatric Proximal Femur Fractures Benjamin Sheffer, MD;DerekKelly,MD;SethCope,MD;MatthewWideman; JamesBeaty,MD;WilliamWarner,MD;DavidSpence,MD;JeffreySawyer,MD CampbellClinicOrthopaedics, Memphis,TN 1404:00 PM–4:04 PM Functional Outcomes of Tillaux and Triplane Fractures with 2-5mm of Intra-Articular Gap Vidyadhar Upasani, MD;BenjaminLurie,BA;  NoelleVanRysselberghe,BA; AndrewPennock,MD RadyChildren’sHospital,SanDiego, SanDiego,CA 4:05 PM–4:14 PM Discussion EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORGSUBSPECIALTY DAYFRIDAY, MAY 15, CONTINUED 1352:05 PM–2:09 PM Randomized Clinical Trial Comparing Intramedullary Kirschner-Wires to Titanium Elastic Nails for Pediatric Femur Fractures in Dar es Salaam, Tanzania: A Preliminary Analysis EdmundEliezer,MD;MsamiEvarist,MD; BrysonMcharo,MD;RevocatusBernard,MD;  JohnIbrahim,MD;DavidShearer,MD;SaamMorshed,MD;Patrick Curran, MD MuhimbiliOrthopaedicInstitute, DaresSalaam,Tanzania 1362:10 PM–2:14 PM Flexible Versus Rigid Nailing of Femur Fractures in 8 to 12-Year Olds: Where are We Now? Katherine Schroeder, MD;  RameshGhanta,BS;BarkhaChhabra,MD;NicoleMontgomery,MD TexasChildren’sHospital,Houston,TX 1372:15 PM–2:19 PM “Length Unstable” Pediatric Femoral Shaft Fractures Treated with Flexible Elastic Nails Have Few Complications PhilipFontenot,MD;Omar Atassi, MD; GennadiyBusel,MD; GuadalupeDeLaFuente,MD; AnjanShah,MD;DavidWatson,MD;KatheryneDownes,PhD;RoySanders,MD;HassanMir,MD UniversityofSouthFlorida,Tampa,FL 2:20 PM–2:29 PM Discussion Session 1: Turning Punitive M&M Conference into Trauma Quality Improvement Conference: It’s Easy If You Know How2:30 PM–2:35 PM The Orthopaedic Surgeon’s Guide to Quality Improvement CarolineTougas,MD2:35 PM–2:38 PM The “One-Off” Complication: Case Presentation CarolineTougas,MD2:38 PM–2:42 PM Tracking and Trending the One-Off Complication To Ensure It Doesn’t Happen Again JohnKemppainen,MD2:43 PM–2:47 PM The Provider-Caused Complication: Case Presentation CarolineTougas,MD

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SUBSPECIALTY DAY362020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeFRIDAY, MAY 15, CONTINUED 1414:15 PM–4:19 PM Titanium Elastic Nails System (TENS) in Adolescent Forearm Fractures : Using Bone Age as an Objective Guide to Its Limits ChinChuenTan;KennethWong,FRCS;JohnAllen,PhD;Arjandas Mahadev, FRCS KKWomen’sandChildren’sHospital, Singapore,Singapore 1424:20 PM–4:24 PM Outcomes of Displaced Lateral Condyle Humerus Fractures Treated with Closed Versus Open Reduction Adam Thiessen, MD;MarilynElliott; ShawnFunk,MD;BrandonRamo,MD TexasScottishRiteHospital,Dallas,TX 1434:25 PM–4:29 PM Treatment of Forearm Fractures in Children: Is Single Bone Fixation Adequate? Tsung-yu Lan, MD Far-easternMemorialHospital, DepartmentofOrthopedicSurgery, NewTaipeiCity,Taiwan 4:30 PM–4:36 PM DiscussionSession 2: Variations in Common Fracture Care: Benign Practice Variability or Failure of Trauma Practice Protocols?4:37 PM–4:39 PM Monteggia Fractures: Case Presentation MauricioSilva,MD4:40 PM–4:45 PM Closed Management Without Fixation KatherineSchroeder,MD4:46 PM–4:51 PM Operative Management with Fixation KristinLivingston,MD4:51 PM–4:54 PM Discussion – MauricioSilva,MD4:55 PM–4:57 PM Midshaft Forearm Fractures: Case Presentation MauricioSilva,MD4:58 PM–5:03 PM Forearm Fracture: Closed Management Without Fixation Shawn“Skip”Gilbert,MD5:04 PM–5:09 PM Forearm Fracture: Operative Management with Fixation PatrickBosch,MD5:09 PM–5:12 PM Discussion – MauricioSilva,MDCLOSING RECEPTIONLocation: 2001 Pan American Plaza, San Diego Date: May 15, 2020Time: 7:30 pm – 11:00 pmThe Friday Closing Reception will be at the Air & Space Museum, which is in historic Balboa Park just minutes from downtown. The San Diego Air & Space Museum is California’s ofcial air and space museum and education center. Established in 1961, the Museum is an afliate of the Smithsonian Institution and was the rst aero-themed Museum to be accredited by the American Alliance of Museums. The Museum is known throughout the world for its collection of extraordinary and historically signicant aircraft, spacecraft and research materials. The Museum’s exhibits include rare and unique aircraft engines, instruments, models and equipment, as well as aviation-related medals, trophies, art, uniforms and spacesuits. The San Diego Air & Space Museum also is home to the International Air & Space Hall of Fame, which since 1963 has honored the world’s most signicant pilots, crew members, visionaries, inventors, aerospace engineers, business leaders, preserva-tionists, designers and space explorers.Attire: casual attire including casual collared shirts, tops, jeans and cotton dresses. Closing reception is included with attendee registration.Accompanying Persons must be registered to attend.5:13 PM–5:15 PM Distal Tibial Physeal Fractures: Case Presentation MauricioSilva,MD5:16 PM–5:21 PM Distal Tibial Physeal Fracture: Closed Management Without Fixation MattEllington,MD5:22 PM–5:27 PM Distal Tibial Physeal Fracture: Operative Management with Fixation ScottYang,MD5:27 PM–5:30 PM Discussion – MauricioSilva,MD

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37EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDSATURDAY, MAY 16, 2020UPPER/LOWER EXTREMITYModerator: Apurva Shah, MDeModerator: Jaime Denning, MD7:30 AM–7:35 AM Welcome Remarks 1447:36 AM–7:40 AM What is the Value of Nonsurgical Interventions in the Treatment of Pediatric Ganglion Cysts? CarolynShanks,BS;TylerSchaeffer,BA;DanielleHogarth,BS;MarilynElliott; AndreaBauer,MD;JoshuaAbzug,MD;Christine Ho, MD TexasScottishRiteHospitalforChildren,Dallas,TX 1457:41 AM–7:45 AM Functional Outcomes of Tendon Transfer for Brachial Plexus Birth Palsy Using the Hoffer Technique Nina Lightdale-Miric, MD;RamAlluri,MD;ErinMeisel,MD;GinaKim,MA; JesseKaplan,MD;SoaBougioukli,MD;MilanStevanovic,MD Children’sHospitalLosAngeles(CHLA), LosAngeles,CA 1467:46 AM–7:50 AM Sprengel’s Deformity: An Analysis of Surgically and Non-surgically Treated Patients Carley Vuillermin, MBBS;  KembleWang,MD;KathrynWilliams,MS;MichaelHresko,MD;PeterWaters,MD BostonChildren’sHospital,Boston,MA 7:51 AM–7:59 AM Discussion 1478:00 AM–8:04 AM Comparison of the Prediction Accuracy of Lower Extremity Segment Length at Maturity of the Sanders Skeletal Stage/Multiplier, Paley Multiplier/Greulich and Pyle Skeletal Age, and White/Menelaus Formulae John Birch, FRCSC;MarinaMakarov; DavidPodeszwa,MD;JamesSanders,MD;Chan-HeeJo,PhD TexasScottishRiteHospitalforChildren,Dallas,TX 1488:05 AM–8:09 AM Dual Plate Epiphysiodesis for Limb Length Inequality: Followed to Maturity Peter Stevens, MD;MatiasDesperes,MD;PhilipMcClure,MD;AngelaPresson,PhD;JenniferHerrick,BA UniversityofUtah,SaltLakeCity,UT 1498:10 AM–8:14 AM Monitoring with Tantalum Beads  DemonstratesNoClinicallySignicantGrowth Following Percutaneous Transphyseal Screw Epiphysiodesis SreethaSidharthan;ClareKehoe; GraceWang,BA;RogerWidmann,MD;JohnBlanco;Emily Dodwell, MD HospitalforSpecialSurgery,NewYork,NY 8:15 AM–8:23 AM Discussion 1508:24 AM–8:28 AM Growth Modulation for Fixed Flexion Contracture of the Knee: A Comparison of Two Techniques Philip McClure, MD;HamzaAlrabai,MD;MartinGesheff,BS;ShawnStandard,MD;JohnHerzenberg,MD RubinInstituteforAdvancedOrthopedics,SinaiHospitalofBaltimore,Baltimore,MD 1518:29 AM–8:33 AM Successful Ponseti-treated Clubfeet at Age Two Years: What is the Rate of Surgical Intervention After This? MatthewSiebert,BS;ChelseaKaracz,MS;B. Stephens Richards, MD TexasScottishRiteHospitalforChildren,Dallas,TX 1528:34 AM–8:38 AM ThereIsNoBenettoHipDysplasiaScreening in Children with Idiopathic Clubfoot DellMcLaughlin,MD;Maryse Bouchard, MD;  RuthGremminger,MD;MarwahSadat TheHospitalforSickChildren,Toronto,Ontario,Canada 8:39 AM–8:47 AM Discussion

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382020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeSATURDAY, MAY 16, CONTINUED NEUROMUSCULARModerator: Emily Dodwell, MDeModerator: Wade Schrader, MD1538:48 AM–8:52 AM Predicted Life Expectancy in Patients with Cerebral Palsy and Neuromuscular Scoliosis Undergoing Spinal Fusion: An Exploratory Analysis from a Single Institution Over 15 Years Arun Hariharan, MD;CarlosPargas; JosephPeteld,MD; MargaretAnnBaldwin,MD; JulioJauregui,MD;KennethRogers,PhD;SukenShah,MD;FreemanMiller,MD;MichaelShrader;JulieanneSees,DO Nemours/A.I.duPont,Wilmington,DE 1548:53 AM–8:57 AM In Search of a Warning Signal: Predicting Rapid Curve Progression in Neuromuscular Scoliosis JoshuaBram,BS;AlexaKarkenny,MD;RonitShah;DivyaTalwar,MPH; Keith Baldwin, MD;John(Jack)Flynn,MD Children’sHospitalofPhiladelphia, Philadelphia,PA 1558:58 AM–9:02 AM ClassicationsofMotorLevelin Myelomeningocele: Are they Indicative of Ambulatory Function? Melissa Bent MD;SusanRethlefsenPT;NicoleMueske;TishyaWrenPhD Children’sHospitalLosAngeles, LosAngeles,CA 9:03 AM–9:11 AM Discussion 1569:12 AM–9:16 AM Impact of Hip Surveillance on Surgical Practice: What Makes a Difference? StaceyMiller,PT;MaureenO’Donnell,MD;Kishore Mulpuri, MBBS, MS BCChildren’sHospital,Vancouver,BC,Canada 1579:17 AM–9:21 AM Nusinersin Does Not Mitigate Hip and Spine Pathoanatomy in Spinal Muscular Atrophy Patients MichaelTroy,BS;PatriciaMiller,MS; BasilDarras,MD;Brian Snyder, MD, PhD BostonChildren’sHospital,Boston,MA 1589:22 AM–9:26 AM Gait Disturbances Following ‘Perc” Hamstring Lengthenings for Treatment of Cerebral Palsy Allison Scott, MD;JudithLinton,PT; ChristinaBickley,BOCO ShrinersHospitalforChildren,Houston,Houston,TX 9:27 AM–9:35 AM Discussion 9:40 AM–10:00 AM Break HIPModerator: Vishwas Talwalkar, MDeModerator: Ying Li, MD15910:05 AM–10:09 AM Even “Experts” Can Be Fooled: The Reliability of Clinical Examination in Diagnosing Developmental Hip Dislocations in Newborns Alexander Aarvold, FRCS (Ortho);  NicholasClarke,FRCS(Ortho); Wudbhav(Woody)Sankar,MD; PhilipHarper,MBBS;JoseHerrera-Soto,MD; BrijilJoseph,MMED(Ortho); EmilySchaeffer,PhD; KishoreMulpuri,MBBS,MS BCChildren’sHospital, Vancouver,BC,Canada 16010:10 AM–10:14 AM HipClickIsNotSignicantlyAssociatedwith DDH Prevalence Among Infant Hips Referred for Evaluation of DDH Margaret Siobhan Murphy-Zane, MD;  PatrickCarry,MS;KaleyHolmes,BA; BrianKohuth,PA;DebbieBurke,PA-C; TylerFreeman,MD;MatthewBelton,MD;NancyMiller,MD;GaiaGeorgopoulos,MD Children’sHospitalColorado,Aurora,CO 16110:15 AM–10:19 AM Ultrasonographically Reduced but Dysplastic Hip (Graf II) at 4-6 Weeks of Age: No Radiographic Differences Between Hips Treated with a Harness and Those Observed Without Treatment Luis Moraleda, MD;  JoaquinNuñezdeArmas,MD; MarPerezMartin-Buitrago,PhD; MariaSalcedo,MD; GasparGonzalez-Moran,MD HospitalUniversitarioLaPaz,Madrid,Spain 10:20 AM–10:28 AM Discussion

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39EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDSATURDAY, MAY 16, CONTINUED 16210:29 AM–10:33 AM AI-Augmented 2D Cine Ultrasound Improves the Reliability and Accuracy of Hip Dysplasia Diagnosis Sukhdeep Dulai, FRCSC;SiyavashNia,MSc; AbhilashRakkunedeth,PhD; JacobL.Jaremko,MEd UniversityofAlberta, Edmonton,Alberta,Canada 16310:34 AM–10:38 AM Updated Normal Values of the Pediatric Hip Joint: A Retrospective Cohort Study DerekHesse,BS;IanHollyer; JamieBurgess,PhD;Joseph Janicki, MD Ann&RobertH.LurieChildren’sHospital,Chicago,IL 16410:39 AM–10:43 AM Part-Time Abduction Bracing in Infants with Residual Acetabular Dysplasia: Does Compliance Monitoring Support a Dose-Dependent Relationship? Ishaan Swarup, MD;DivyaTalwar,MPH;Wudbhav(Woody)Sankar,MD Children’sHospitalofPhiladelphia, Philadelphia,PA 10:44 AM–10:52 AM Discussion 16510:53 AM–10:57 AM Inverted Acetabular Labrum is Predictive of Pavlik Harness Treatment Failure for Children with Developmental Hip Dysplasia AliSiddiqui,BS;LillianLai,MD; Rachel Goldstein, MD Children’sHospitalLosAngeles, LosAngeles,CA 16610:58 AM–11:02 AM Hip Dysplasia at 4 Years in Patients with Perinatal Risk Factors for DDH Simon Humphry, FRCS (Ortho);  TimHall,MBBS;MargaretHall-Craggs,MD;AndreasRoposch,MD GreatOrmondStreetHospital,London,UnitedKingdom 16711:03 AM–11:07 AM Long Term Outcomes Following Successful Closed or Open Reduction of Late Detected Developmental Dysplasia of the Hip William Morris, MD;SeanHinds,BS; HannahWorrall,MPH;Chan-HeeJo,PhD;HarryKim,MD TexasScottishRiteHospitalforChildren,Dallas,TX 11:08 AM–11:16 AM Discussion 16811:17 AM–11:21 AM Intermediate Outcomes following Surgical Hip Dislocation Approach for the Treatment of Hip Deformity in Healed Legg-Calve-Perthes Disease Eduardo Novais, MD;PedroJusto,MD;YoungJoKim,MD;MichaelMillis,MD; WhitneyHovater;DanielMaranho,MD;MarianaFerrer,MD;PatriciaMiller,MS;RoyaDastjerdi BostonChildrensHospital,BostonMA 16911:22 AM–11:26 AM Reoperations Following Periacetabular Osteotomy Secondary to Impingement JeffreyLamping,MD;ErikaDaley,MD; Ira Zaltz, MD BeaumontHealth,RoyalOak,MI 17011:27 AM–11:31 AM Surgical Treatment of Femoroacetabular Impingement: Arthroscopy vs. Surgical Hip Dislocation – A Propensity Matched Analysis Ira Zaltz, MD;AsheeshBedi; JeffreyNepple,MD;PaulBeaule,MD; MichaelMillis,MD;RafaelSierra,MD;ErnestSink,MD;ANCHORStudyGroup;JohnClohisy,MD WashingtonUniversitySchoolofMedicine,SaintLouis,MO 11:32 AM–11:40 AM Discussion

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PAPER POSTERSPaper Poster 1Structural Effects of Periosteal Resection on BoneMatthew Halanski, MD;RajeevChaudhary,PhD;XiluWang,BS;JinWookHwang,MS;CorinneHenak,PhD;XiaopingQian,PhD;ThomasCrenshaw,MS;AmyPitschneider,BS;KevinEliceiri,PhD;PaulCampagnola,PhD;EllenLeiferman,DVMUniversityofWisconsin,Madison,WI Paper Poster 2Are Serum Ion Levels Elevated in Pediatric Patients with Growing Spine Implants versus Controls?Geoffrey Haft, MD;SmithaMathew,MBBS;A.NoelleLarson,MD;YongXie;BangkeZhang,MD;ToddMilbrandt,MD;MatthewAbdel,MD;AndreVanWijnenMayoClinic,Rochester,MN Paper Poster 3Serum-Derived Exosomes of Congenital Pseudarthrosis of Tibia in Pediatric Patients Suppresses Bone Formation and Increases Bone Resorption via Alteration of Exosomal Bone-Related ProteinsGe Yang, PhD;QianTan,MD;HuiYu,PhD;HaiboMei,MDDepartmentofOrthopedic,HunanChildren’sHospital,Changsha,People’sRepublicofChina Paper Poster 4Using a Selective Epigenetic Regulator in a Mouse Model to Reversibly Slow Physeal GrowthTodd Milbrandt, MD;DanielaGaleanoGarces,MD;CatalinaGaleano-Garces,BS;JenniferGrauberger,BA;A.NoelleLarson,MD;AndreVanWijnenMayoClinic,Rochester,MN Paper Poster 5Chiari Osteotomy in Multiple Epiphyseal Dysplasia Including Pseudoachondroplasia with a Mean Follow-Up of 18 Years and Survival AnalysisAurélie Andrzejewski, MD;GeorgesFinidori,MD;ZagorkaPéjin,MD;AlinaBadina,MD;PhilippeWicart,PhD;ChristopheGlorion,PhDHôpitalNeckerEnfantsMalades,Paris,France Paper Poster 6Patient Reported Outcomes Assessment of 243 Children and AdolescentswithLowerLimbDeciency:AMulti-CenterStudyJoel Lerman, MD;DavidWestberry,MD;JanetWalker;SarahNossov,MD;NinaCung;FionaScottShrinersHospitalsforChildren-NorthernCalifornia,Sacramento,CA 402020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangePaper Poster 7The Surgical Treatment of Severe Cervical Kyphosis in Diastrophic DysplasiaJohnHeydemann,MD;W.G.StuartMackenzie,MD;KennethRogers,PhD;ColleenDitro,NP;JeffreyCampbell,MD;SukenShah,MD;William Mackenzie, MDNemours/AIduPontHospitalforChildren,Wilmington,DE Paper Poster 8Introduction of Reasoned Percutaneous Achilles Tenotomy in the French Method of Idiopathic Congenital Cubfoot: Which Indication for Which Result?Virginie Nguyen Khac, MD;MarineDeTienda,MD;ZagorkaPejin,MD;ValérieMerzoug,MD;RaphaelSeringe,MD;ChristopheGlorion,PhD;PhilippeWicart,PhDHôpitalNecker-EnfantsMalade,Paris,France Paper Poster 9Talar-Tarsal Stabilization: Rationale and Preliminary OutcomesPeter Stevens, MD;AlexLancaster,MD;AnsabKhwaja,MDUniversityofUtah,SaltLakeCity,UT Paper Poster 10Pediatric and Adolescent Lisfranc Injuries – Management and OutcomesIndranil Kushare, MD;NicoleWunderlich,PA-C;AhmedElabd,MD;ElsayedAttia,MDTexasChildren’sHospital,Houston,TX Paper Poster 11Clinical Presentation and Epidemiology of Hand and Wrist Ganglion Cysts in ChildrenJoshuaBram,BS;DavidFalk,MD;BenjaminChang;JenniferTy,MD;InesLin,MD;Apurva Shah, MDChildren’sHospitalofPhiladelphia,Philadelphia,PA Paper Poster 12Paediatric Elbow Fractures: Public Playground Equipment Does Not Meet The Safety StandardPardeepSidhu;JenniferSmith;HarpreetChhina,MSc;BrittanyLim;IanPike,PhD;Anthony Cooper, FRCSCBCChildren’sHospital,Vancouver,Canada Paper Poster 13The Effect of Social Deprivation on Pediatric PROMIS Scores in Children with Brachial Plexus Birth InjuryMary Claire Manske, MD;JosephLetzelter,MD;MichelleJames,MDShrinersHospitalforChildrenNorthernCalifornia,Sacramento,CA Paper Poster 14DeningtheDeformity:Utilityofthe45-degreeDunnViewinAssessing Deformity in Slipped Capital Femoral EpiphysisCraigSmith,MD;PerrySchoenecker,MD;JohnClohisy,MD;Jeffrey Nepple, MDWashingtonUniversitySchoolofMedicine,SaintLouis,MO

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41EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDPaper Poster 15Effect of Surgeon Performance in Salter Innominate Osteotomy on Long-Term OutcomeDaisuke Kobayashi, MD;ShinichiSatsuma;RyosukeSakata;MakiKinugasa;IzumiKomoto,MDKobeChildren’sHospital,Kobe,Japan Paper Poster 16Comparison of a Telescoping Screw Fixation System to Traditional In Situ Pinning for Stable Slipped Capital Femoral EpiphysisCodyHansen,BS;JamesBomar,MPH;Vidyadhar Upasani, MDRadyChildren’sHospital,SanDiego,SanDiego,CA Paper Poster 17Prognostic Factors for Joint Deformity Following Pediatric Septic ArthritisRyosuke Yamaguchi, MD;TomoyukiNakamura,MD;KazuyukiTakamura,MD;YasuharuNakashima,MDKyushuUniversity,Fukuoka,Japan Paper Poster 18Predicting Which Children with Osteomyelitis Require Secondary Surgery– Results from the CORTICES Multicenter DatabaseBenjamin Shore, MD, MPH, FRCSC;KeithBaldwin,MD;JenniferLaine,MD;DavidSpence,MD;JoshuaMurphyMD;JaclynHill;CorticesStudyGroupBostonChildren’sHospital,Boston,MA Paper Poster 19Pediatric Extremity Cellulitis: When Should the Orthopedic Surgeon Become Involved?Ernest Young, MD;TraceyBastrom,MA;AndrewPennock,MD;EricEdmonds,MD;BurtYaszay,MDRadyChildren’sHospital,SanDiego,SanDiego,CA Paper Poster 20Fassier Duval Rod Placement in the Epiphysis: Does this Relate to Rod Failure?KaleyHolmes,BA;JaneGralla,PhD;ChristopherBrazell,BA;PatrickCarry,MS;SuhongTong,MS;NancyMiller,MD;Gaia Georgopoulos, MDChildren’sHospitalColorado,Aurora,CO Paper Poster 21Guided Growth for Ankle Valgus Deformity: The Challenges of Hardware RemovalDavid Westberry, MD;AshleyCarpenter;ErinPichiotino,MD;GeorgeGraham;JonathanThomas,BS;LaurenHyer,MDShrinersHospitalforChildren:Greenville,Greenville,SC Paper Poster 22Extramedullary Implantable Limb Lengthening (EIILL) for Congenital Limb Length Discrepancy (LLD) is Safe and EffectiveClaire Shannon, MD;CraigRobbins;DrorPaley,MD,FRCSCPaleyOrthopedicandSpineInstitute,WestPalmBeach,FL Paper Poster 23Presence of an Anterolateral Talar Facet Evaluated on Computerized Tomography Scan in the Pediatric PopulationMeganFischer-Colbrie;ScottMubarak,MD;Kathleen Rickert, MDRadyChildren’sHospital,SanDiego,CA Paper Poster 24Orthopaedic Outcomes of Prenatal Versus Postnatal Repair of MyelomeningoceleIshaan Swarup, MD;DivyaTalwar,MPH;LoriHowell,DNP;NickAdzick;BernardHorn,MDChildren’sHospitalofPhiladelphia,Philadelphia,PA Paper Poster 25Progression of Hip Instability in Children with Spinal Muscular AtrophySayan De, MD;AlexisGerk,BS;CosmoKwok,MD;WadeCoomer,BS;ZhaoxingPan;JoyceOleszek,MD;AnneStratton,MD;FrankChang,MDChildren’sHospitalColorado,Aurora,CO Paper Poster 26Does Patellar Tendon Advancement Improve the Outcomes Following Anterior Distal Femoral Hemiepiphysiodesis in Children with CP?Robert Kay, MD;SusanRethlefsen,PT;AlisonHanson;OussamaAbousamra,MDChildren’sHospitalLosAngeles,LosAngeles,CA Paper Poster 27The Design and Validation of a Wire Navigation Simulator for Pediatric Supracondylar Humerus FracturesHeather Kowalski, MD;EmilyConnor,MD;GebThomas,PhD;DonaldAnderson,PhD;MatthewKaram;StevenLong;J.LawrenceMarsh,MDUniversityofIowa,IowaCity,IA Paper Poster 28Determinants of Caregiver Satisfaction in Pediatric OrthopedicsIanSingleton,BS;RachelGarnkel,MD;JasonMalone,DO;M’HamedTemkit;Mohan Belthur, MDPhoenixChildren’sHospital,Phoenix,AZ

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2020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDPaper Poster 29Addressing the Gender Gap in Academic Pediatric Orthopaedics: An Analysis on Female Representation at the Pediatric Orthopaedic Society of North America (POSNA) Annual MeetingsJudyWu,BS;ManrajRandhawa,BS;CaitlynSiu,BS;HariArneja,BS;EmilySchaeffer,PhD;NatalyaSarkisova,BS;KishoreMulpuri,FRCSC;JenniferLaine;Rachel Goldstein, MDBCChildren’sHospital,Vancouver,BC,Canada Paper Poster 30Implementation of a Multimodal Pain Protocol in Pediatric Orthopedic Surgery Decreases Inpatient Opioid AdministrationDalibel Bravo, MD;RyanRoach,MD;JamesFeng,MD;OlgaSolovyova,MD;DavidGodfried,MD;MaraKaramitopoulosNYULangoneOrthopedicHospital,NewYork,NY Paper Poster 31The Alarming Level of Pre- and Post-Operative Chronic Pain and Anxiety in Adolescent Idiopathic Scoliosis Patients: A Pilot StudyShelbyCerza,MA;KileyPoppino,BS;HeatherRichard;TeresaCollins-Jones,PhD;Brandon Ramo, MDTexasScottishRiteHospitalforChildren,Dallas,TX Paper Poster 32Microbiology of Spine Wounds in Paediatric Patients Undergoing Correction for ScoliosisHaemish Crawford, MBChB;TylerRudolph,MBChB;LorenaFloccari,MD;AntonyField,MD;SallyRoberts,MBChBStarshipChildren’sHospital,Auckland,NewZealand Paper Poster 33Intraoperative Hypothermia Reduction in Posterior Spinal Fusion for Adolescent Idiopathic Scoliosis: A Multidisciplinary Quality Value Safety Initiative (QVSI)ChristopherMcLeod,DO;CharuSharma;KileyPoppino,BS;Daniel Sucato, MDTexasScottishRiteHospitalforChildren,Dallas,TX Paper Poster 34Outcomes of MPFL Reconstruction via a Quadriceps Turndown Technique in the Adolescent/Pediatric PopulationKevin Klingele, MD;MichaelFisher,DO;SatbirSingh,BS;LeahFrischmann,BS;CodyMoore,MD;MatthewBeranNationwideChildren’sHospital,Columbus,OH Paper Poster 35Not Just the Capitellum: Lateral Elbow Overuse Injuries in Pediatric Female GymnastsPhilip Wilson, MD;CharlesWyatt,NP;WilliamSearls,BS;AaronZynda,BS;HenryEllis,MDTexasScottishRiteHospitalforChildren,Dallas,TX Paper Poster 36Opioid Re-Prescription Following ACL Reconstruction is Associated with Subsequent Opiate Use DisordersEliCahan,BA;NicoleSegovia,BS;JapsimranKaur,BS;CharlesChan,MD;John Vorhies, MDStanfordSchoolofMedicine,Stanford,CA Paper Poster 37Cast Univalve Location Matters: Determines Pressure at the Three-Point MoldBlakeMontgomery,MD;KennethPerrone,MD;SuYang;NicoleSegovia,BS;LawrenceRinsky,MD;CarlaPugh,FACS;Steven Frick, MDStanfordUniversity,PaloAlto,CA Paper Poster 38Where Is the Axillary Nerve Danger Zone with Fixation of the Pediatric Shoulder?Tyler Stavinoha, MD;AlekseiDingel,BS;KevinShea,MDStanfordUniversitySchoolofMedicineDepartmentofOrthopaedicSurgery,Stanford,CA Paper Poster 393-D Biomechanical Analysis of Flexible Intramedullary Nailing in Length Unstable Pediatric Femur FracturesEmmanouilGrigoriou,MD;AmeyaHarendraDeshpande;AllisonBinkley,MD;RobertGalpin,MD;MarkEhrensberger,PhD;Jeremy Doak, MDUniversityatBuffalo-StateUniversityofNewYork,Buffalo,NY Paper Poster 40Neurological Assessments of Upper Limb in Young ChildrenIgnacio Sanpera-Trigueros, MD;JeanMariaGomez-Alessandri,MD;MiguelGarcia-Cancho,MDHospitalUniversitariSonEspases,PalmadeMallorca,Spain Program Subject to Change42

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432020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDePOSTERSePoster 1An Ovine Study of Locked Intramedullary Implants Across the Distal Femoral Growth PlateRaymond Liu, MD;AlexBenedick,MD;Chang-YeonKim,MD;KouamiAmakoutou,MD;DerrickKnapik,MD;LewisZirkle,MDRainbowBabiesandChildren’sHospital/CaseWesternReserveUniversity,Cleveland,OH ePoster 2Increased Frequency of SHOX Duplications in ClubfootMatthew Dobbs, MD;ChristinaGurnett,MDWashingtonUniversitySchoolofMedicine,SaintLouis,MO ePoster 3The Effect of Physeal Biopsy on Limb Growth in a Lamb ModelPeter Stevens, MD;RichardEpperson;DustinWilliams,PhDUniversityofUtah,SaltLakeCity,UT ePoster 4The Importance of Genetic Whole Genome-based Diagnosis in Epiphyseal DysplasiaAmeliaLindgren,MD;ShimulChowdhury,PhD;LaugeFarnaes;MariTokita;KatarzynaEllsworth,PhD;MeredithWright,PhD;StephenKingsmore,MBChB;Vidyadhar Upasani, MDRadyChildren’sHospital,SanDiego,SanDiego,CA ePoster 5ANovelCross-Linkable,Microber-LikeCollagenScaffoldSupports Chondrocyte Differentiation and GrowthDaniel Weltsch, MD;JohnToddLawrence,MD;MingkunWang,ONP-C;AndrewFok,BA;DanielleRux,PhD;MaurizioPacici,PhD;Li-HsinHan,PhDChildren’sHospitalofPhiladelphia,Philadelphia,PA ePoster 6Comparison of the Load Delivered to Scoliosis Patients Using Different Halo Gravity Traction Systems: A Bench StudyJonathanPoli,MSc;TylerMorton,BS;RobertC.Aylor,BS;ChristopherHoward,MBA;WalterKrengel;KlaneWhite,MD;GregoryRedding,MD;Jennifer M. Bauer, MDSeattleChildren’sHospital,Seattle,WA ePoster 7Preoperative Antibiotic For Pediatric Supracondylar Humerus Fractures: A Prospective, Double-Blinded, Randomized Control TrialSumit Gupta, MD;JaysonJohnson,MD;EnnioRizzoEsposito,MD;DanielHoernschemeyer,MDOrthopedicsDepartmentattheUniversityofMissouri-Columbia,Columbia,MO ePoster 8Occipito-Cervical Fusion In Morquio SyndromeVijay Sriram, MS;KailashSarathy,MS;SriramKrishnaswamy,MD;ChidambaramBalasubramaniam,MBBSKanchiKamakotiChildsTrustHospital,Chennai,TamilNadu,India ePoster 9Use of Recombinant Human Bone Morphogenetic Protein for Revision Cervical Spine Fusion in Children with Trisomy 21: A Case SeriesLaraCohen,BS;BrianYang,MD;NoraO’Neill,BA;MichaelGlotzbecker,MD;Daniel Hedequist, MDBostonChildren’sHospital,Boston,MA ePoster 10Classifying Vertebral Artery Anatomy Abnormality in Children with Skeletal DysplasiasJennifer Bauer, MD;EkamjeetDhillon,MD;ShawnKamps,MD;EzekielMaloney,MD;MelodyHsu,BS;VivianaBompadre,PhD;KlaneWhite,MDSeattleChildren’sHospital,Seattle,WA ePoster 11Intramedullary Nailing with Supplemental Plate and Screw Fixation of Long Bones of Patients with Osteogenesis Imperfecta: Short-term Follow-upJeanne Franzone, MD;KennethRogers,PhD;RichardKruseAlfredIduPontHospitalforChildren,Wilmington,DE ePoster 12Intraoperative Non-Invasive Blood Pressure Cuff and Tourniquet Use: What is the Risk in the Pediatric OI Population?KirstenRoss,MD;JosephGibian,BS;Jeffrey Martus, MDVanderbiltUniversityMedicalCenter,Nashville,TN ePoster 13Peri-Operative Management of Children with SMAMatthew Halanski, MD;AndrewSteinfeldt,MD;SarahSund,BS;KarenPatterson,DPT;ScottHetzel,MS;RewaisHanna,BS;ShellyEagen,NP;MarySchroth,MD;BridgetMuldowney,MDUniversityofWisconsin-Madison,Madison,WI ePoster 14The Effect of Selective Dorsal Rhizotomy on Spinal Deformities in Children with Cerebral Palsy: A Long Term Follow Up StudyStaceyMiller,PT;JonathanLau,MD;MariaJuricic,PT;BejaanJivraj,MBBS;PaulSteinbok;FirozMiyanji,MD;Kishore Mulpuri, MBBS, MSBCChildren’sHospital,Vancouver,BC,Canada EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG

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442020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeePoster 15A New Radiographic Measurement for Quantitative Assessment of Forefoot Splay in Children with Persistent Idiopathic Toe WalkingJon Davids, MD;DonaldKephart,MD;SeanBrown,BS;AnitaBagley,PhD;VedantKulkarni,MDShrinersHospitalNorthernCalifornia,Sacramento,CA ePoster 16Treatment and Outcomes of Clubfeet Associated with Amniotic Band SyndromeElaineTran,MD;Melissa Esparza ,MD;B.StephensRichards,MD;AnthonyRiccio,MDTexasScottishRiteHospital,Dallas,TX ePoster 17The Five Year Outcome of the Ponseti Method in Children with Idiopathic Clubfoot and ArthrogryposisChrisChurch,PT;AbigailMcGowan;JohnHenley,PhD;MaureenDonohoe,DPT;TimothyNiiler,PhD;MichaelShrader,MD;Reid Nichols, MDNemoursduPontHospitalforChildren,Wilmington,DE ePoster 18The Relationship Between Initial Treatment, Calf Circumference, Ankle Power and Single Leg Hop Distance: A Study of 40 Ponseti Treated Unilateral ClubfeetNeil Segaren, FRCS (Ortho);ChristineDouglas,CPS;MattThornton;RoisinDelaney;SallyTennantRoyalNationalOthopaedicHospital,Stanmore,London,UnitedKingdom ePoster 19The Effect of Lateral Column Lengthening on Subtalar Motion: Are We Trading Deformity For Stiffness?BrittanyHedrick,MD;JacobZide,MD;DanielleThomas,MD;ClaireShivers,BS;MatthewSiebert,BS;WilliamPierce;MitchellHarris,MD;Anthony Riccio, MDTexasScottishRiteHospitalforChildren,Dallas,TX ePoster 20Surgical Outcomes and Predictive Factors in Polysyndactyly of the Fifth ToeKyung Rae Ko, MD;JongSupShim,MD;MinkyuSeo,MDSamsungMedicalCenter,Seoul,RepublicofKorea ePoster 21Minimal Correlation Between Pediatric Outcomes Data Collection Instrument and the Shriners Hospital Upper Extremity Evaluation Scores in Children with Unilateral Cerebral PalsyJulieanne Sees, DO;RameezQudsi,MD;TimothyNiiler,PhD;JohnKee,BA;NancyLennon,PT;JenniferTy,MDNemoursAlfredIduPontHospitalforChildren,Wilmington,DE ePoster 22Clinically Relevant Change in the Pediatric and Adolescent Shoulder Survey (PASS)Tracey Bastrom, MA;AndrewPennock,MD;KellyBoutelle,BS;AbigailWagle,BS;EricEdmonds,MDRadyChildren’sHospital,SanDiego,SanDiego,CA ePoster 23Pediatric Proximal Phalanx Base Fractures in Fingers: Identifying the Need for Surgical ManagementNicoleLook,MD;AndyLalka,MPH;MicahSinclair,MD;JohnSchutz,BS;HannahKorrell,BA;JenniferNance,DNP;Sarah Sibbel, MDChildren’sHospitalColorado,Aurora,CO ePoster 24Fresh Osteochondral Allograft Transplantation for Osteochondritis Dissecans of the Capitellum – Best Fit Based on Radius of CurvatureZacharyGoldstein,BS;AustinThompson,BS;MichaelRobbins,MD; Scott Yang, MD;OmarNazir,MD;AdamMirarchi,MDOregonHealth&ScienceUniversity,Portland,OR ePoster 25Pediatric Trigger Thumb with Metacarpophalangeal Joint Hyperextension or InstabilitySheng Jin, MD;XuYunlan;WangZhigang,MDShanghaiChildren’sMedicalCenter,PudongNewArea,Shanghai,People’sRepublicofChina ePoster 26Access to Occupational Therapy Services Are Limited for Pediatric Patients Regardless of Insurnace StatusMeghanMcCullough,MD;AshleyCaron,BS;MarilanLuong,MPH;Cynthia Nguyen, MD;RubyShin;KatherineAu,MD;SelinaPoon,MDShrinersforChildrenMedicalCenter-Pasadena,Pasadena,CA ePoster 27Characterization of Pediatric Extension Trigger Thumb: An Update Insight of a Rare Phenotype from Prospective Cohorts of 1,280 Trigger Thumb PatientsXu Yunlan;KaiyingShen,MD;ShengJinShanghaiChildren’sMedicalCenter,Shanghai,People’sRepublicofChina ePoster 28Declining Rates of Legg-Calvé-Perthes Surgery: National Trends Using the Kids’ Inpatient DatabaseJarenLagreca,MD;AmandaNickel,MPH;MichaelFinch,PhD;BenjaminMartin,MD;Jennifer Laine, MDGilletteChildren’sSpecialtyHealthcare,St.Paul,MN

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452020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDEARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORGePoster 29Epiphyseal Translation as a Risk Factor for Avascular Necrosis (AVN) in Unstable Slipped Capital Femoral Epiphysis (SCFE)Preetha Sinha, MD;AhmedKhedr;TanyaKenkre,PhD;NatalieNovak,BS;MichaelMcClincy,MD;PatrickBosch,MDUPMCChildren’sHospitalofPittsburgh,Pittsburgh,PA ePoster 30Are We Attaining Patient Satisfaction and Using Effective OutcomeMeasures?DeningtheMinimalClinicallyImportantDifferenceandSubstantialClinicalBenetandTheirRelationshipto Satisfaction After a Periacetabular OsteotomyJeffreyPeck,MD;StacyRobustelli,BS;JosephNguyen,MPH;Ernest Sink, MDHospitalforSpecialSurgery,NewYork,NY ePoster 31Prospective Evaluation of In Situ Screw Fixation for Stable Slipped Capital Femoral EpiphysisSamuelBaird,BS;Clarabelle Devries, MD;JamesBomar;VidyadharUpasani,MDRadyChildren’sHospital,SanDiego,SanDiego,CA ePoster 32Seamlessly Weaving Research into Clinical CareBrendaMatthews;KileyPoppino,BS;DominicChittilappilly,BS;Brandon Ramo, MDTexasScottishRiteHospitalforChildren,Dallas,TX ePoster 33Where Should we Aim to Penetrate the Epiphysis for Pinning a Stable SCFE? A Clinical and FE Analysis Study of Failed SCFE Fixation Focused on the Epiphyseal Tubercle vs. the Epiphyseal CenterEduardoNovais,MD;Young Jo Kim, MD;AliKiapour,PhD;Yi-MengYen;WilliamMorris,MD;AtaKiapour,PhDBostonChildrensHospital,Boston,MA ePoster 34Treat the Image or the Infant: Ultrasonographic Abnormalities in Stable HipsElizabeth Hubbard, MD;RobertLark,MD;RobertFitch,MDDukeUniversityMedicalCenter,NC ePoster 35Telehealth & Teleradiology Services at a Tertiary Care CentreEvaHabib,BS;WendyKrishnaswamy,BSN;EmilySchaeffer,PhD;Kishore Mulpuri, FRCSC BCChildren’sHospitalVancouver,BCCanada ePoster 36Descriptive Epidemiology of Upper Extremity Septic Arthritis in Children – Review of the CORTICES DatabaseYing Li, MD;DanielleCook,BS;AllanBeebe,MD;JaimeDenning;Joseph(Jay)Janicki,MD;MeganJohnson,MD;AntoinetteLindberg,MD;CorticesStudyGroupC.S.MottChildren’sHospital,MichiganMedicine,AnnArbor,MI ePoster 37Risk Factors for Complicated Osteo-articular Infections in ChildrenVinitha Shenava, MD;ElsayedAttia,MD;AhmedElabd,MDTexasChildren’sHospital,Houston,TX ePoster 38Osteo-articular MRSA infections in Children. Does It Really Matter?Vinitha Shenava, MD;ElsayedAttia,MD;AhmedElabd,MDTexasChildren’sHospital,Houston,TX ePoster 39Utility of Serum Biomarkers in Monitoring Response to Treatment for Pediatric Osteoarticular InfectionsNicholas Gajewski, MD;VivianHu,BS;SierraPinal,BA;PaulKrogstad,MD;AnnabelleDeStMaurice,MD;MauricioSilva,MD;RachelThompson,MDUCLA,LosAngeles,CA ePoster 40Prevalence of Intra-canal Spinal Exostoses in Pediatric MHE: Prospective Spine at Risk ProgramCatphuongVu,MD;AntoinetteLindberg,MD;VivianaBompadre,PhD;KlaneWhite,MD;Jennifer M. Bauer, MDSeattleChildren’sHospital,Seattle,WA ePoster 41TheModiedKocherCriteriaisaGoodPredictorofBothSepticHip and KneeRoyBisht;Jessica Burns, MD;PaulKang;MohanBelthur,MD;MichaelShrader,MDPhoenixChildren’sHospital,Phoenix,AZ ePoster 42Poor Outcomes of Acute Compartment Syndrome in the Setting of Extracorporeal Membrane Oxygenation: A Multicenter Case SeriesKacy Peek, MD;VivianaBompadre,PhD;MarilynElliott;ChristineHo,MD;AntoinetteLindberg,MD;MarkMiller;GregorySchmale,MD;SuzanneSteinmanUniversityofWashingtonSeattleChildren’sHospital,Seattle,WA

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462020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeePoster 43Novel Sagittal Plane Radiographic Analysis of Guided Growth for Knee Flexion Contractures: Utilization of Blumensaat-Femoral AngleJacobCohen,BS;NicholasCasler;GabrielGlaun,BS;MarkBirnbaum,MD;DeniseLope,zNP;Jonathan H. Phillips, MDOrlandoHealth,Orlando,FL ePoster 44Outcomes of Non-operative Treatment for Stable Osteochondritis Dissecans Lesions in Adolescent PatientsAlexiaGagliardi;VictorQuach,BS;GregoryWalker,MD;KatherineDahab,MD;DavidHowell;Jay Albright, MDChildren’sHospitalColorado,Aurora,CO ePoster 45PrevalenceofVitaminDDeciencyinPediatricLimbLengthening and Deformity Correction PatientsJessicaRivera,MD;NequeshaMohamed,MD;IciarDavilaCastrodad,MD;NoelleDiGioia,DO;NancyCampbell,DO;MeghaAbraham;TheaRecai,BS;JenniferEtcheson,MD;John Herzenberg, MDRubinInstituteforAdvancedOrthopedics,SinaiHospitalofBaltimore,Baltimore,MD ePoster 46Increased Prevalence of Juvenile Osteochondritis Dissecans in Patients with Juvenile Idiopathic ArthritisAndrewHinkle,BS;CelesteQuitiquitDickason,MD;homasJinguji,MD;SusanShenoi,MBBS;MaheshThapa,MD;MichaelSaper,DO;VivianaBompadre,PhD;Gregory Schmale, MDSeattleChildren’s,Seattle,WA ePoster 47Smart Phone Accelerometers Used to Monitor Postoperative Weight-bearing ProtocolKristineKhieu,BS;SurabhiKalyan,BS;AlanLunardhi,BS;Vidyadhar Upasani, MDRadyChildren’sHospital,SanDiego,CA ePoster 48How Much Change is Important? Calculating the Minimal Clinically Important Difference of the GMFM, PODCI, and CPCHILD after Orthopedic Surgery in Children with Cerebral PalsyJodieShea,BS;RachelTombeno;PatriciaMiller,MS;MariaFragala-Pinkham,DPT;Colyn Watkins, MD;BrianSnyder;TravisMatheney,MD;BenjaminShore,MD,MPH,FRCSCBostonChildren’sHospital,Boston,MA ePoster 49Adding Value in Single Event Multi Level Surgery (SEMLS) for Cerebral Palsy Patients with Crouch Gait: Value Added by a Second SurgeonKeith Baldwin, MD;KimberlyStevenson,MD;DavidSpiegel,MD;DivyaTalwar,MPH;ApurvaShah,MD,MBAChildren’sHospitalofPhiladelphia,Philadelphia,PA ePoster 50Long Term Patient Reported Outcomes of Physical Function, Life Satisfaction, and Pain in Young Adults with Cerebral PalsyMichael Shrader, MD;NancyLennon,PT;ChrisChurch,PT;WilliamRobinson;JohnHenley,PhD;TimothyNiiler,PhD;JulieanneSees,DO;JasonHoward,MD;FreemanMiller,MDNemoursduPontHospitalforChildren,Wilmington,DE ePoster 51Treatment of Severe Knee Flexion Contractures in Patients with ArthrogryposisHarold Van Bosse, MDShrinersHospitalforChildren,Philadelphia,PA ePoster 52Effect of Pediatric Orthopedic Intervention on Ambulatory Adults with Cerebral Palsy: A Long-term Longitudinal Assessment.TanyawatSaisongcroh,MD;Michael Shrader, MD; NancyLennon,PT;ChrisChurch,PT;JulieanneSees,DO;FreemanMiller,MDAlfredIduPontHospitalforChildren,Wilmington,DE ePoster 53Cerebral Palsy (CP) Hip Outcomes Project (CHOP): Centre Variability in Baseline Presentation and ManagementMariaJuricic,PT;EmilySchaeffer,PhD;StaceyMiller,PT;JeffreyBone,MSc;BenjaminShore,MD,MPH,FRCSC; UnniNarayanan,MSc,MBBS,FAAOS,FRCSC;Kishore Mulpuri, FRCSCBCChildren’sHospital,Vancouver,BC,Canada ePoster 54The Ponseti Method: What Is Happening Worldwide?Yael Gelfer, FRCS;KatieHughes,MBBS;TobinMangel,MBBS;AndreasFontalis,MD;ShlomoWientroub;DeborahEastwood,FRCSSt.George’sUniversityHospitalNHSTrust,London,UnitedKingdom ePoster 55Evaluation of the Burden of Foot and Ankle Deformity in Fibular Hemimelia. Is it Time to Broaden the Clinical Spectrum?Alpesh Kothari, FRCS (Ortho);MaryseBouchard,MDHospitalforSickChildren,Toronto,Ontario,Canada

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472020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDEARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORGePoster 56A Quality Improvement Project to Reduce the Use of Combination Acetaminophen-Opioid Medications within a Large Health SystemSunnyTrivedi,BS;Kevin Shea, MD;WhitneyChadwick,MD;ShabnamGaskari,PhD;EllenWang,MD;ThomasCaruso,MDLucilePackardChildren’sHospital,StanfordUniversitySchoolofMedicine,PaloAlto,CA ePoster 57Pediatric Venous Thromboembolism: Variable Rates of Incidence, Risk Factors, and Prophylaxis between Orthopaedic and Non-Orthopaedic Surgical CohortsAneeshSamineni,BA;RyanSanborn,BA;DanielleCook,BS;DanielHedequist,MD;CollinMay,MD;BentonHeyworth,MD;Benjamin Shore, MD, MPH, FRCSCBostonChildren’sHospital,Boston,MA ePoster 58Exome Sequencing of a Multiplex Family with Idiopathic Scoliosis Implicates KIF7 in IS PathogenesisMelissaCuevasMS;MariaCattellPhD;XiaomiChenPhD;ElizabethTerhuneMS;CambriaWetheyBS;JustinCaseyMS;Brit-tanSutphinBA;ShreyashPradhanBA;RobinBaschal;AnnaMonley;KennethJonesPhD;ErinBaschalPhD;BruceAppelPhD;Nancy H. Miller MDUniversityofColorado,Aurora,Colorado ePoster 59Administration of Intraoperative Adjuvant Antibiotics Reveals No Change in Postoperative Surgical Site Infection Rate: A National Analysis of Posterior Spinal Fusions for ScoliosisMaxHyman;JamieBurgess,PhD;Joseph (Jay) Janicki, MDAnn&RobertH.LurieChildren’sHospital,Chicago,IL ePoster 60Postoperative Outcomes in Diabetic Pediatric Orthopaedic Surgery Patients: A Pediatric NSQIP StudyFarzamFarahani,BS;JunhoAhn,BS;PaulNakonezny,PhD;DaneWukich,MD;Robert Wimberly, MD;AnthonyRiccio,MDUniversityofTexasSouthwesternMedicalCenter,Dallas,TX ePoster 61Does Topical Vancomycin Reduce Surgical Site Infection in Pediatric Spine Fusion Patients?William Shaughnessy, MD;SmithaMathew,MBBS;A.NoelleLarson,MD;ToddMilbrandt,MD;AnthonyStans,MDMayoClinic,Rochester,MN ePoster 621 to 30 Years Post-Surgical HRQoL of Adolescent Idiopathic Scoliosis (AIS) with SRS-22 - A Study of 1315 PatientsTsz Ping Lam;Kin-WahBobbyNg,FRCS(Ortho);AlecHung,MD;WaiWangChau,MSc;JackCheng,MDDepartmentofOrthopaedicsandTraumatology,ChineseUniversityofHongKong,Shatin,N.T.,HongKong ePoster 63No Correlation Between Healthcare System Device Volume and Price Paid for Spinal Implants in a National DatabaseEliCahan,BA;AmandaChawla,MA;LyNguyen,MS;JamesLee,BS;VigneshRajagopalan,MS;Kevin Shea, MDStanfordSchoolofMedicine,Stanford,CA ePoster 64Establishing Consensus on the Best Practice Guidelines for the Use of Bracing in Adolescent Idiopathic ScoliosisMatthewSimhon,BS;Benjamin Roye, MD;HirokoMatsumoto,MS;CynthiaAlmonte,PT;PrachiBakarania,DPT;HagitBerdishevsky,PT;LoriDolan,PhD;SabrinaDonzelli,MD;KellyGrimes,DPT;TheodorosGrivas,MD;MatthewHalsey,MD;MichaelHresko,MD;ElizabethJanssen;LoriKarol,MD;AndreaLebel;MichaelMendelow,MD;StefanoNegrini,MD;PeterNewton,MD;JohnTunney;StuartWeinstein;GrantWood,CO;FabioZaina,MD;MichaelVitaleColumbiaUniversityMedicalCenter,NewYork,NY ePoster 65Is Growth-Friendly Surgery Adequate for the Treatment of Non-ambulatory Early-onset Scoliosis Myelomeningocele Patients?Norman Ramirez-Lluch, MD;RyanFitzgerald,MD;GerardoOlivella,MD;JohnSmith,MD;PeterSturm;PaulSponseller,MD,FAAOS;LawrenceKarlin,MD;ScottLuhmann,MD;TriciaSt.Hilaire,MPH;PediatricSpineStudyGroupPediatricSpineStudyGroup,ValleyForge,PA ePoster 66Uncorrected Pelvic Obliquity is Associated with Lower Health Related Quality of Life in Ambulatory but not in Non-Ambulatory Patients After Surgical Treatment in Patients with Early Onset ScoliosisHiroko Matsumoto, MS;JacobBall,BS;BenjaminRoye,MD;SumeetGarg,MD;MarkErickson,MD;AmerSamdani,MD;DavidSkaggs,MD,MMM;DavidRoye;MichaelVitale,MD;PediatricSpineStudyGroupColumbiaUniversity,NewYork,NY

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482020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeePoster 67Liposomal Bupivacaine for Adolescent Idiopathic Scoliosis Does Not Effectively Decrease Post-Operative PainDavidMacknet,MD;RichardMcknight,MD;SusanOdum,PhD;Michael Paloski, DOOrthoCarolina,Charlotte,NC ePoster 68Nationwide Ethnic/Racial Differences in the Surgical Treatment of Discoid Meniscus in Children: A PHIS Database StudyMatthew Milewski, MD;RyanCoene;KathrynWilliams,MS;LannaFeldman,MS;KellyMcFarlane,BS;JenniferBeck,MDBostonChildren’sHospital,Boston,MA ePoster 69A Practical Pre-Operative Predictive Model for Determining Hamstring Autograft Size for Anterior Cruciate Ligament Reconstruction in Children and AdolescentsBenjaminSherman,DO;KevinKwan;John Schlechter, DOChildren’sHospitalofOrangeCounty,Orange,CA ePoster 70Is Percutaneous Medial Collateral Ligament (MCL) Relaxation During Anterior Cruciate Ligament Reconstruction a Safe Option for Gaining Access to the Medial Knee Compartment in Children?John Schlechter, DO;BenjaminSherman,DO;BrynGornick,BS;TannerHarrah,DOChildren’sHospitalofOrangeCounty,Orange,CA ePoster 71Kids Run Differently: Preliminary Analysis of Adolescent 2D Kinematic Running FormYukikoMatsuzaki,DPT;MadisonHeath,BS;Peter Fabricant, MDHospitalforSpecialSurgery,NewYork,NY ePoster 72Do Delays to Operative Management Affect Rates of Meniscal Injury in Pediatric and Adolescent ACL Reconstructions?JoshuaPark,BA;BrodyDawkins,BA;PeterFabricant,MD;AllisonGilmore,MD;MarkSeeley,MD;R. Justin Mistovich, MDCaseWesternReserveUniversitySchoolofMedicine,RainbowBabiesandChildren’sHospital,Cleveland,OH ePoster 73The Other Leg: Higher Rates of Contralateral ACL Tears in Adolescent Soccer Players Following ACL ReconstructionHenry Ellis, MD;K.JohnWagner,BS;ClaireAlthoff;Chan-HeeJo,PhD;PhilipWilsonTexasScottishRiteHospitalforChildren,Dallas,TX ePoster 74Can MRIs Accurately Diagnose Meniscal Pathology in Pediatric Patients with ACL Tears?JoshuaPark,BA;BrodyDawkins,BA;PeterFabricant,MD;AllisonGilmore,MD;MarkSeeley,MD;R. Justin Mistovich, MDCaseWesternReserveUniversitySchoolofMedicine,RainbowBabiesandChildren’sHospital,Cleveland,OH ePoster 75Sagittal Plane Alignment Affects Stability in Supracondylar Humerus Fracture PinningRushyuan Lee, MD;AlexanderBitzer,MD;StephenBelkoff,PhD;ChristaLibrizzi,BS;ChimelieChibututu,BSJohnsHopkinsHospital,Baltimore,MD ePoster 76Assessing Medial Epicondyle Fracture Displacement: A Comparison of Digital Tomosynthesis with Plain Radiographs and CT ScanKristin Livingston, MD;EmilyEdwards,MD;MichaelGrifth,BA;JohnMacKenzie,MD;MatthewZapalaUCSFBenioffChildren’sHospital,SanFrancisco,CA ePoster 77A Single Education Session of Orthopaedic Residents Does Not Improve Patient Outcomes in Pediatric Distal Radius FracturesEdwardCompton,BS;AdrianLin;KennethIllingworth,MD;Melissa Bent, MDChildren’sHospitalLosAngeles,LosAngeles,CA ePoster 78Checklists in Femur Fractures: High Adherence after Implementation of Computer Based Pediatric Femur GuidelinesKimberlyJacobsen,MD;AndrewGupta,MD;MichaelGoldberg;Ted Sousa, MDSeattleChildrensHospital,Seattle,WA ePoster 79Reducing the Reductions: An Analysis of Resource Utilization of Distal Radius Fractures in a Pediatric Emergency DepartmentKeithOrland,MD;AdamBoissonneault,MBChB;AndrewSchwartz,MD;RahulGoel,MD;RobertBruce,MD;Nicholas Fletcher, MDChildren’sHealthcareofAtlanta,Atlanta,GA ePoster 80Predicting Failure of Closed Reduction in Paediatric Diaphyseal Forearm Fracture Elastic Stable Intramedullary Nailing (ESIN)LingHuiTay,MBBS;NicoleLee;DarrylChew,MD;Arjandas Mahadev, FRCS; KennethPakLeungWong,FRCS(Ortho)KKWomen’sandChildren’sHospital,Singapore

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492020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDEARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORGVIDEO ABSTRACTSVideo Abstract 1Talo-Calcaneal Coalition Resection with Ankle ArthroscopyIndranil Kushare, MD;ShaneFord,PA-C;KristenKastan;JohnShilt,PA-CTexasChildren’sHospital,Houston,TX Video Abstract 2Graft Preparation Technique for All Soft Tissue Quadriceps Tendon Autograft for ACL ReconstructionBenjaminForstPA-C;LaurenPetersPA-C;DennisHiller;TomasinaLeskaBS;Theodore Ganley, MDChildren’sHospitalofPhiladelphia,Philadelphia,PA Video Abstract 3Pediatric Medial Epicondyle Humerus Fractures: Open Reduction and Internal FixationJamesBomar,MPH;AndrewPennock,MD;Eric Edmonds, MDRadyChildren’sHospital,SanDiego,SanDiego,CA Video Abstract 4Surgical Management of Central Polydactyly of the Foot with Advancement Flaps David Elbert Westberry, MD;AshleyM.Carpenter,BS;AllisonRodriguez,BSShrinersHospitalforChildren:Greenville,Greenville,SC Video Abstract 5Pediatric Trigger Thumb Release: Surgical Technique Sonia Chaudhry, MD ConnecticutChildren’sMedicalCenter,Hartford,CT Video Abstract 6Intra-articular Radial Head Fracture with an Entrapped Fragment in a 6-year-old Girl Barbara Minkowitz, MD;JenniferRachelleRistic,PA-C;EytanMendelow,BS;CamrynMyersAtlanticHealthSystems,Morristown,NJ Video Abstract 7Posterior Approach to the Lateral Condyle Fracture - A Pediatric Cadaver Video Simulation Tyler Stavinoha, MD;KevinG.Shea,MDStanfordUniversityDepartmentofOrthopaedicSurgery,Stanford,CA Video Abstract 8Fully Waterproof One-legged Spica Cast for Femur Fractures Barbara Minkowitz, MD;JenniferRachelleRistic,PA-C;EytanMendelow,BS;VioletWallersteinAtlanticHealthSystems,Morristown,NJ Video Abstract 9Roux-Goldthwait Procedure and MPFL Reconstruction in a Skeletally Immature Female for Recurrent Patella Dislocation Barbara Minkowitz, MD;AnthonyJamesScillia,MD;JenniferRachelleRistic,PA-C;EytanMendelow,BS;CamrynMyersAtlanticHealthSystems,Morristown,NJ Video Abstract 10 Percutaneous Pinning of Pediatric Proximal Humerus Fractures Ishaan Swarup, MD;MichaelS.Hughes,MD;JoshuaBram,BS;BernardDavidHorn,MD;TheodoreJ.Ganley,MDChildren’sHospitalofPhiladelphia,Philadelphia,PA Video Abstract 11Open Reduction and Fixation of Acute Sternoclavicular Fracture-Dislocations in Children Ishaan Swarup, MD;MichaelS.Hughes,MD;AlejandroCazzulino,BA;DavidAndrewSpiegel,MD;ApurvaShah,MDChildren’sHospitalofPhiladelphia,Philadelphia,PA Video Abstract 12 Operative Fixation of a Triphalangeal Thumb AndrewAnthonyDobitsch,BA;AshokPara;DanielCoban;YaroslavBasyuk,MD;Alice Chu, MD RutgersNewJerseyMedicalSchool,Newark,NJ Video Abstract 13 A Case of Bilateral Acrosyndactyly from Constriction Ring Syndrome DanielCoban;AshokPara;AndrewAnthonyDobitsch,BA;YaroslavBasyuk,MD;Alice Chu, MDRutgersNewJerseyMedicalSchool,Newark,NJ Video Abstract 14Anterior Approach and Capital Realignment for Severe Slips Sandeep Patwardhan, MS;AshokShyam,MSSanchetiInstituteforOrthopaedicsandRehabilitation,PuneMaharashtra,India Video Abstract 15 Medial Soft Tissue Imbrication with Lateral Release for Pediatric Patellofemoral Instability Folorunsho Edobor-Osula, MD;ZuhdiAbdo,MDRutgers-NewJerseyMedicalSchool,Newark,NJ

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502020 ANNUAL MEETING SCIENTIFIC PROGRAM, CONTINUEDProgram Subject to ChangeVideo Abstract 16 Technique for Elongation, Derotation, Flexion Casting Using a ModiedJacksonTableBlakeMontgomery,MD;KaliRTileston,MD;JapsimranKaur,BS;NicoleAlexandriaSegovia,BS;DanKym,BS;MeghanN.Imrie,MD;JamesPolicy,MD;LawrenceA.Rinsky,MD;John Vorhies, MD StanfordUniversitySchoolofMedicine,Stanford,CA Video Abstract 17Osteochondral Allograft with Open Surgical Hip Dislocation WilliamT.Baumgartner,MD;Brian Michael Haus, MD; TrevorJ.Shelton,MDUniversityofCalifornia,Davis,Sacramento,CA Courtesy Lisa Field SanDiego.orgVideo Abstract 18Armboard Technique for Reduction Pinning Paediatric Supracondylar Fractures Sandeep Patwardhan, MS;ParagSancheti,MD;AshokShyam,MSSanchetiInstituteforOrthopaedicsandRehabilitation,PuneMaharashtra,India

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AWARDS51EARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG2019 POSNA CLINICAL RESEARCH GRANTS Todd Milbrandt, MD“Anterior Vertebral Body Tethering vs. Fusion for Idiopathic Scoliosis”David Podeszwa, MD“Are Patients as Active as They Say: Subjective/Objective Activity Measures”2019 POSNA START UP RESEARCH GRANTS Juan Brito Campana, MD“Shared Decision Making in the Treatment of Scoliosis”Ryan Goodwin, MD“Risser vs. Sanders in AIS: A Prospective Cohort Study Assessing Mismatch”Mark Adamczyk, MD“Primary Cilia Alterations in the Hypothyroid Porcine Growth Plate”2019 POSNA/ZIMMER BIOMET SPINERESEARCH GRANT Daniel Hedequist, MD“Reliability of the AOSpine Classication System in Children”2019 RESEARCH GRANT & AWARD WINNERS2019 KUO MEMORIAL RESEARCH AWARD Matthew Oetgen, MD“Modulation of the Injury Associated with Acute Compartment Syndrome”2019 HUENE MEMORIAL RESEARCH AWARD B. Stephen Richards, MD“Opportunities to Optimize Ponseti Brace Wear Compliance and Success”2019 ST. GILES YOUNG INVESTIGATOR RESEARCH AWARD Rachel Thompson, MD“Muscle Disease in Cerebral Palsy”2019 POSNA DIRECTED RESEARCH GRANTS Scott Luhmann, MD“Biomarkers and Cytokines in the Work-Up of Septic Arthritis”Selina Poon, MD“Pedicle Screw Placement with a 3D Deformity Model”2019 POSNA BASIC SCIENCE RESEARCH GRANTS Roger Cornwall, MD“Proteasome Inhibition for Contracture Prevention in NBPI”Charles Johnston, MD“Thoracic Volume Expansion by Ventral Directed Costo-sternoplasty”ABOUT POSNAThe Pediatric Orthopaedic Society of North America (POSNA) is a group of professionals comprised mostly of pediatric orthopaedic surgeons. We are board certied in orthopaedic surgery and have participated in additional training to become specialized in the care of children’s musculoskeletal health and our practice reects this dedication. We, as a group, strive to become the authoritative source on such care through appropriate research that will lead to the best evidence based patient care.MISSION STATEMENTTo improve the care of children with musculoskeletal disorders through education, research, and advocacy.

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EXPLORE SAN DIEGO5240minutes*30minutes*25minutes*20minutes*15minutes*10minutes*MEXICOTijuanaSilverStrandHotel delCoronadoPoint LomaCoronadoChulaVistaSeaportVillageHortonPlazaDOWNTOWNAmtrakBalboaParkSan DiegoZooHarborIslandShelterIslandSunsetCliffsOceanBeachOldTownMission ValleySeaWorldMission BeachLa JollaPacificBeachLa Jolla ShoresTorreyPinesDel MarRacetrackSolanaBeachRanchoSanta FeCardiff-by-the-SeaMarine CorpsAir StationMiramarPowayRanchoBernardoViejas CasinoSanteeMission TrailsRegional ParkLa MesaSpringValleyEl CajonSan DiegoZOO SafariParkEscondidoJulianAnzaBorregoDesertPalomarObservatoryTemeculaLEGOLANDCaliforniaCarlsbadOceansideEncinitas57880552163159412594677815558880512552SycuanCasinoRamonaBarona CasinoPhoenix355 miles(6.5 car)Palm Springs139 miles(2.5 hrs. by car)Las Vegas331 miles(5.5 hrs. by car)Los Angeles125 miles(2.5 hrs. by car)Disneyland92 miles(1.5 hrs. by car)AirportCabrilloNationalMonumentTorrey PinesState ReserveMissionSan Luis ReyGolden AcornCasinoNatureReservePala CasinoPechanga CasinoCamp PendletonMarine Corps BaseHarrah'sRincon CasinoCasinoPaumaValley ViewCasinoHortonPlazaSeaportVillageGaslampQuarterPark Blvd.Harbor Dr.Petco ParkLittleItalyEmbarcaderoAmtrakDepotBroadway5163945DOWNTOWNCruise Ship TerminalMarket St.Harbor Dr.USS MidwayMuseumOrfila WineryRancho BernardoWineryMission San Diegode AlcalaQualcommStadiumMuseumsRosaritoEnsenadaFlowerFields56Clairemont / Kearny Mesa/ConvoyImperial BeachMission Bay12554*Times are basedon travel from the airportand may vary based ontime of day. Averagetravel time islisted.OtayLakesAverage Temperatures (F°/C°)Jan65.8°/18.7°49.7°/9.8°May69.3°/20.7°59.8°/15.4°Sep77.1°/25°65.6°/18.6°highlowhighlowhighlowFeb66.3°/19°51.5°/10°Jun72.2°/22.3°62.6°/17°Oct74°/23.3°61.2°/16.2°Mar66.3°/19°53.6°/12°Jul75.8°/24.3°65.9°/18.8°Nov69.9°/21°53.6°/12°Apr68.7°/20.3°56.4°/13.5°Aug77.8°/25.4°67.3°/19.6°Dec66.3°/19°48.9°/9.3°905SAN DIEGOBirchAquariumThe Official Travel Resource for the San Diego RegionVisit us at

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EXPLORE SAN DIEGO, CONTINUEDEARLY REGISTRATION DEADLINE: 03.20.20 – REGISTER ONLINE TODAY AT POSNA.ORG53LEGOLAND California and SEA LIFE AquariumLocated north of downtown, LEGOLAND delivers 128 acres of fun, creativity, imagination and entertainment with more than 60 interactive attractions and rides geared to children aged 2-12. SEA LIFE Aquarium at LEGOLAND educates children about life under the sea.USS Midway MuseumThe world’s most visited ship museum, the USS Midway honors San Diego’s rich military history and features 29 restored aircraft, ight simulators, a self-guided walking audio tour in many languages and more.Balboa ParkThe U.S.’s largest urban cultural park, Balboa Park is home to the San Diego Zoo, striking Spanish Colonial Revival architecture, beautiful gardens, 17 unique museums and popular outdoor recreation.Cabrillo National MonumentSet on the tip of scenic Point Loma, Cabrillo National Monument commemorates the discovery of California in 1542 and offers spectacular views of downtown, San Diego Bay and the entire region.Old Town San DiegoDating back to the early 1800s, Old Town San Diego is the rst Spanish settlement on the U.S. West Coast and fea-tures historic sites and buildings and is a popular area for shopping, entertainment and restaurants serving authentic Mexican cuisine.CoronadoSituated just across San Diego Bay from downtown, Coronado is known for its beach, rated one of America’s best; its charming small-town character, and the historic Hotel Del Coronado.EXPLORE SAN DIEGOWith near perfect weather year-round, 70 miles of spectacular coastline, world-class attractions and a thriving urban core, complete with a sophisticated art, dining and nightlife scene, San Diego has earned the name California’s beach city. Visit: Explore San Diego San Diego Attractions 45 Best things to do in San DiegoSAN DIEGO MUST SEESSan Diego Zoo The San Diego Zoo is a world-famous 100-acre tropical garden that houses 4,000 animals of 800 rare and exotic species including Giant Pandas from China. It is considered one of the top ve zoos in the world. San Diego Zoo Safari ParkLocated northeast of downtown, the San Diego Zoo Safari Park is an 1,800-acre preserve where animals roam free over vast expanses as they would in their native habitats of Africa and Asia.SeaWorld San DiegoLocated on scenic Mission Bay, SeaWorld features six major shows, fun family attractions, thrilling rides and dozens of exhibits containing marine life from around the globe.Ana-Borreggo Desert State ParkLocated in San Diego’s rustic East County, this 600,000-acre park provides access to a captivating desert land-scape.

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EXPLORE SAN DIEGO, CONTINUED54On Lane and Above Land ActivitiesRolling hills, canyons, lakes, mountains and the vast Anza-Borrego Desert in the north and east of the city offer diverse outdoor recreational experiences on land and above lane including mountain biking, hiking, rock climb-ing, camping, 4-wheeling, fresh water shing, para-gliding and skydiving.GolfSan Diego has 93 outstanding courses, located in every conceivable setting from ocean to the mountains to the desert, and the region’s near-perfect climate allows golfers to play year-round. The most popular course is the world-famous Torrey Pines Golf Course in La Jolla.CULINARY AND CRAFT BEERFine Dining to Street FoodSan Diego’s 6,700 eateries range from award-winning, ne dining restaurants to casual, surfside taco shops. The region’s multi-cultural communities provide diverse cuisines from Afghan and Vietnamese to Lebanese and Ethiopian. Cali-Baja cuisine is a regional specialty and a local food favorite is the sh taco.Farmer’s MarketsSan Diego is home to 6,000 small farms and popular farm-er’s markets where visitors can sample and buy delicious local fresh produce. Held daily in different neighborhoods like Little Italy on Saturday and Hillcrest on Sunday, the farmer’s markets feature food booths, arts and crafts and entertainment.Craft BeerSan Diego is considered the ‘Craft Beer Capital of the U.S.’ and home to over 100 craft breweries which are located around the region. San Diego beers are award-winning, beating traditional brewing countries like England, Germany and Belgium in world beer competitions.NEIGHBORHOODSLa Jolla Nicknamed the ‘jewel’ of San Diego, this beautiful Medi-terranean-style village is home to luxury and historic hotels, ne dining and shopping, world-class arts and culture, and diverse outdoor recreation. CoronadoSituated across San Diego Bay from downtown, the island of Coronado is home to pristine beaches, beautiful gardens and parks, a rich history and culture, and a quaint village with unique restaurants and shops.Gaslamp QuarterThe historic heart of downtown, the Gaslamp Quarter combines beautiful Victorian buildings from the late 1800s with a dynamic urban setting to create an exciting dining, nightlife and shopping district.Little ItalyWith a rich Italian heritage, Little Italy is a vibrant down-town neighborhood home to popular outdoor patio cafes, trendy bars and restaurants, art galleries, boutique shops and colorful annual festivals.Hillcrest and North ParkHillcrest and North Park are known for their exciting mix of unique eateries, exotic bistros, chic boutiques, vintage clothing stores, trendy nightlife, fun entertainment and eclectic arts and culture.OUTDOOR RECREATIONBeaches and Water Sports San Diego’s beautiful beaches range from the white sandy shores of Coronado Beach to Torrey Pines State Park, set against dramatic 300-foot sandstone cliffs. Surng, swimming, kayaking, snorkeling, diving, paddle boarding, sailing and sport shing are popular activities and can be enjoyed year-round.

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55ARE YOU A POSNA MEMBER?1,400+ 50POSNA Members from CountriesPOSNA MEMBERSHIP BENEFITSWith over 20% of our membership comprised of women, we offer unparalleled access FOR ALL to the following range of benets:• Reduced registration fees for POSNA Annual Meeting and International Pediatric Orthopaedic Symposia (IPOS).• Opportunity to serve as faculty and present at POSNA Annual Meeting, Pre-Course, and IPOS.• Access to the POSNA Job Board• Ability to participate in the POSNA Traveling Fellowship in conjunction with the European Paediatric Orthopaedic Society (EPOS), the Asia Pacic Pediatric Orthopaedic Society (APPOS), and the Sociedad Latin America Ortopedia y Traumatologia Infantil (SLAOTI)). For more information, please visit • Access to the POSNA member directory• Leadership opportunities: Have a voice in over 30 POSNA committees including Education, Advocacy, Quality, Safety and Value Initiative, and more. Additionally, members are eligible to be elected to serve on the POSNA Board of Directors.• Complimentary online access to all current and past issues of the Journal of Pediatric Orthopaedics (JPO), the source for the best research and up-to-date treatments of musculoskeletal problems in children.Apply today to join over 1,400 of your friends and colleaguesin one of the most diverse orthopaedic subspecialty societies.POSNA EDUCATION AND RESOURCES• POSNA Annual Meeting• IPOS (International Pediatric Orthopaedic Symposium)• POSNA Mentorship Program• Webinars• Tutorials• Pediatric Orthopaedic Online Learning Portal• POSNA’s website for parents and patients• Opportunity for Global OutreachPOSNA RESEARCH• POSNA funded Research Grants• Industry funded Research Grants • Foundation funded AwardsPOSNA Mission To improve the care of children with musculoskeletal disorders through education, research, and advocacy.POSNA VisionA world with fewer pediatric musculoskeletal disabilities.

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POSNA’s new address as of 2/1/20:1 Tower Lane, Suite 2410Oakbrook Terrace, IL 60181(847) 698-1692FAX (847) 268-9694