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POSNA AM20 Virtual Mtg Pgm

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TABLE OF CONTENTSProgram Committee............................................2President’s Welcome ...........................................3Board of Directors .............................................6Acknowledgments .............................................7General Meeting Information.....................................8CME Credit...................................................8Disclosure and FDA Statement ...................................8Annual Meeting Policies.........................................9Connect with POSNA...........................................9LOE Levels of Evidence ........................................10Meeting at a Glance...........................................12Program Chair’s Welcome ......................................13Live Session ............................................. 14 - 16POSNA Pre-Course ....................................... 18 - 21Young Member Forum .........................................23Speakers & Award Recipients................................ 24 - 26Scientic Program......................................... 28 - 62Symposia Program ........................................ 37 - 41Subspecialty Day ......................................... 43 - 58ePoster Program.......................................... 64 - 80Video Abstracts Program ................................... 81 - 82POSNA Antitrust Policy .................................... 83 - 842020 Research Grant & Award Winners ........................ 85 - 861

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PRE-COURSE COMMITTEEChairA. Noelle Larson, MDCommitteeLindsay Andras, MD Julie Balch Samora, MD, PhD Brian P. Scannell, MD PROGRAM COMMITTEEChairJeffrey Martus, MDCommitteeMichelle Caird, MD Wudbhav (Woody) Sankar, MD Matthew Oetgen, MDABOUT 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.POSNA MISSION STATEMENTTo improve the care of children with musculoskeletal disorders through education, research, and advocacy.CONNECT WITH POSNA DURING THE MEETINGAND SHARE YOUR EXPERIENCES#POSNA2020 @POSNA_org Pediatric Orthopaedic Society of North America (POSNA) linkedin.com/company/posna posna_orthoWebsites: POSNA.org, orthokids.org and posnacademy.org OrthopaedicTraumaAssociationorthopaedic-trauma-association@otatrauma@otatraumaOrthopaedicTraumaAssociationorthopaedic-trauma-association@otatrauma@otatrauma

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Dear Colleagues,Consistent with the guidance provided by public health ofcials, POSNA is committed to reducing the spread of the COVID-19 virus and therefore made the disappointing decision to cancel the 2020 Annual Meeting in San Diego. Many options were explored, including rescheduling at a later time. Unfortunately, we were unable to identify a satisfactory date. The annual meeting is the highlight of the POSNA year. The program committee of Jeff Martus (Chair), Woody Sankar, Michelle Caird and Matt Oetgen had organized an outstand-ing program for San Diego. Some of the highlights in the initial schedule are listed below:• The pre-course “Transition to Adulthood: Orthopedics for the Adolescent,” organized by Noelle Larson. The course was designed to address many unique features of this age group and guide participants in the development of appropriate management strategies.• Recognition of award winners Behrooz Akbarnia (Distinguished Achievement), Charles Johnston (Humanitarian) and Donald Bae (Special Effort and Excellence). • Recognition of grant winners and industry partners.• A scientic program including 170 podium presentations, 40 paper posters, 80 ePosters, multiple symposia and a subspecialty day.• Presidential guest speaker Lori Karol addressing adapting to change in the new decade. • Presidential transfer to incoming president Michael Vitale.• Closing reception at the San Diego Air and Space Museum, located in historic Balboa Park. The museum is an afliate of the Smithsonian Institution and is home to a diverse collection of aircraft. The members of the Program Committee deserve special recognition. Since the cancellationof the on-site event, they have worked hard to make the meeting educational materials available to our members and meeting registrants. This reorganization required a great deal of time, effort and originality. It would not have been possible without the cooperation of the scientic program presenters. I appreciate the many hours Noelle Larson devoted to the development of the pre-course. The efforts of the local hosts Hank and Jill Chambers along with Peter and Cathy Newton also deserve recognition. Of course, all of this couldn’t have happened without the efforts of POSNA Executive Director Teri Stech, Meetings and Educa-tion Manager, Tara Long and the entire POSNA staff. On behalf of POSNA, thank you for your understanding. This has been an extremely difcult time that has resulted in signicant hardship throughout the world. I look forward to seeing you at the 2021 Annual Meeting in Dallas. Stephen Albanese, MDPresident, POSNA3WELCOME

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4STEPHEN ALBANESE, MDPRESIDENTStephen Albanese, MD is Professor of Orthopedic Surgery at SUNY Upstate Medical University in Syracuse, New York. He has been depart-ment chair and residency program director at Upstate since 2000. Dr. Albanese received his undergraduate degree in electrical engineer-ing from Bucknell University and MD from SUNY Buffalo College of Medicine. He completed orthopedic surgery residency at SUNY Upstate Medical University and pediatric orthopedic surgery fellowship at the Hospital for Sick Children in Toronto, Ontario.Dr. Albanese’s academic interests have focused on education, accreditation and certi-cation. He has chaired the AAOS Committee on Evaluation (1996-2001), been a mentor in the AAOS leadership fellows program and completed two terms as a member of the AAOS Council on Education (1996-2001, 2005-09). Dr. Albanese has been a member at large on the AAOS Board of Directors (2002-2004). He served seven years (2005-2012) on the Accreditation Council for Graduate Medical Education (ACGME) Orthopaedic Surgery Residency Review Committee (RRC) and was chair the nal 3 years. He served a 6 year term (2012-2018) on the ACGME Board of Directors and chaired the Program Requirements Committee (2016-2018). He served as a member of the American Orthopaedic Association Academic Leadership Committee (2006-2012). During his ten year term (2007-2017) on the American Board of Orthopaedic Surgery Board of Directors he chaired the Oral Examination Committee (2010-2012), was active in the question writing task force and served as President (2013-2014).Dr. Albanese’s clinical interests are pediatric orthopaedics and spine deformity. He chaired the Scoliosis Research Society Morbidity and Mortality Committee (1998-2000). He served as a member at large on the POSNA Board of Directors (2004-06) and chaired the Education (2000-2002) and Health Care Delivery Councils (2014-2017). In addition, he has served on the Terminology and Nomenclature, Data Management, Education, and Practice Manage-ment Committees for POSNA.His sister, Dr. Margaret Albanese, is also an active member of POSNA. Dr. Albanese lives in Upstate New York with Eileen, his wife of 34 years. They have two sons, Matt and Kevin, who are currently Orthopedic Surgery Residents.BIOGRAPHY

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BIOGRAPHY5MICHAEL VITALE, MD, MPHINCOMING PRESIDENTMichael Vitale, MD MPH is the Ana Lucia Professor of Orthopedic and Neurosurgery and Vice Chief, (Quality and Strategy) of the Department of Orthopaedics at Columbia University Medical Center. He is also Chief of Pediatric Orthopaedics for the New York Presbyterian health system, where he has developed his clinical focus in the care of children with spinal deformity since joining the staff of the Morgan Stanley Childrens Hospital of New York in 2001. Dr. Vitale received his undergraduate degree in biology and psychology from Trinity College, and attended medical school at Columbia University’s College of Physicians & Surgeons, where he also completed a master’s degree in public health. He remained at Columbia for his residency training in Orthopedic Surgery at New York-Presbyterian/Columbia University Irving Medical Center, followed by a fellowship in pediatric orthopedics at the Children’s Hospital of Los Angeles. Early in career, Dr Vitale was chosen as an inaugural member of the AAOS Leadership Fellow Program as well as the POSNA Traveling Fellowship. He has served various roles in the POSNA BOD, and has been the recipient of POSNA’s Arthur Huene Memorial Award, the Angela Kuo award, and the Award for Special Effort.Dr Vitale has served as Chairman of the International Pediatric Orthopaedic Symposium and President of the Childrens Spine Foundation and Pediatric Spine Study Group. He founded the Project for Safety in Spine Surgery, which hosts the annual Summit for Safety in Spine Surgery. He is also an active Member of the Scoliosis Research Society where he has chaired the Committee on Safety and the Committee on Pediatric Medical Devices. In addition to his clinical practice, Dr. Vitale has made a lifelong commitment to clinical research with almost 200 peer-reviewed publications largely focused around pediatric spine surgery, and numerous related chapters and books. Dr Vitale serves on the Board of Crutches for Kids and Alexandra’s Playground, which he co-founded with his wife, Andrea. An avid skier, marathon runner, and recreational tri-athlete, Dr. Vitale’s biggest pleasure is spending his free time with his wife and four sons.

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6PRESIDENTStephen Albanese, MDEast Syracuse, NY PRESIDENT-ELECTMichael Vitale, MDNew York, NY VICE PRESIDENTMininder Kocher, MD, MPHBoston, MA SECRETARYEric Edmonds, MDSan Diego, CA TREASURERMichelle Caird, MDAnn Arbor, MI IMMEDIATE PAST PRESIDENTSteven Frick, MDPalo Alto, CAPAST PRESIDENTRichard Schwend, MDKansas City, MO JUNIOR MEMBER AT LARGEBrian Brighton, MDCharlotte, NC JUNIOR MEMBER AT LARGEFiroz Miyanji, MDVancouver, BC, Canada JUNIOR MEMBER AT LARGEColeen Sabatini, MDOakland, CA SENIOR MEMBER AT LARGE Jonathan Schoenecker, MD, PhDNashville, TN SENIOR MEMBER AT LARGESamantha Anne Spencer, MDBoston, MA SENIOR MEMBER AT LARGEIra Zaltz, MDRoyal Oak, MI AAP REPRESENTATIVE, Ex-ofcioTheodore J GanleyPhiladelphia, PA COMMUNICATIONS COUNCIL CHAIR, Ex-ofcioRobert Cho, MDPasadena, CAEDUCATION COUNCIL CHAIR, Ex-ofcioMartin Herman, MDPhiladelphia, PA HEALTH CARE DELIVERY COUNCIL CHAIR, Ex-ofcioMichael Hresko, MD Boston, MA HISTORIAN, Ex-ofcioWilliam Shaughnessy, MDRochester, MN IPOS REPRESENTATIVE, Ex-ofcio Donald Bae, MD Boston, MA QSVI COUNCIL CHAIR, Ex-ofcioKevin Shea, MDBoise, ID RESEARCH COUNCIL CHAIR, Ex-ofcioUnni Narayanan, MD, FRCSCToronto, ON, CanadaEDITOR IN CHIEF, JPO, Ex-ofcioRobert Hensinger, MD Ann Arbor, MIEXECUTIVE DIRECTOR, Ex-ofcioTeri Stech Oakbrook Terrace, ILBOARD OF DIRECTORS

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ACKNOWLEDGMENTS7The Pediatric Orthopaedic Society of North America gratefully acknowledges the following for their generous nancial support for 2020. 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 LEVELOrthoPediatrics*DIAMOND LEVELDePuy Synthes*Medtronic*Stryker PLATINUM LEVELShriners Hospitals for ChildrenZimmer Biomet* GOLD LEVELBioMarin PharmaceuticalSILVER LEVELArthrexBRONZE LEVELChildren’s Mercy Kansas CityGillette Children’s Specialty HealthcareGlobus MedicalIPSEN BioPharmaceuticalsMD OrthopaedicsNuVasivePega MedicalStanford Children’s Health*Provided Educational Grants for the 2020 Virtual Annual Meeting

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GENERAL MEETING INFORMATION8LEARNING 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 accredited by the ACCME to provide continuing medical education for physicians.CONTINUING MEDICAL EDUCATION The American Academy of Orthopaedic Surgeons designates this live activity (Live Content) for a maximum of 2.5 AMA PRA Category 1 Credits™ and On-Demand Content for a maximum of 24.25 AMA PRA Category 1 Credits™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.DISCLOSUREEach faculty member 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 commit-ments as necessarily implying bias or decreasing the value of the author’s participation in the meeting.FDA STATEMENT Some drugs or medical devices demonstrated at this meeting may not have been cleared by the FDA or have been cleared by the FDA for specic purposes only. The FDA has stated that it is the responsibility of the physician to determine the FDA clearance status of each drug or medical device he or she wishes to use in clinical practice.Academy policy provides that ‘off label’ uses of a drug or medical device may be described in the Academy’s CME activities so long as the “off label” use of the drug or medical device is also specically disclosed (ie., it must be disclosed that the FDA has not cleared the drug or device for the described purpose). Any drug or medical device is being used “off label” if the described use is not set forth on the product’s approval label.4.7 hours may be used for external trauma-related CMEs. Presentations denoted with are eligible for these credits.

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ANNUAL MEETING POLICIES9♦ Indicates those faculty presentations in which the FDA has not cleared the drug and/or medical device for the use described (ie. the drug or medical device is being discussed for an “off label” use).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, state-ment or opinion of the faculty which may be helpful to others who face similar situations.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.REPRODUCTION POLICY POSNA reserves any and all rights to materials presented at the Annual Meeting, including Video Abstracts and ePosters. Reproductions of any kind, by any person or entity, without prior written permission from POSNA, are strictly prohibited. Prohibited reproductions in-clude, but are not limited to, audiotapes, videotape, and/or still photography. ANNUAL MEETING COMING SOON TO POSNA PODCASTSBest of POSNA 2020 on the JPO PodcastYoung Member Forum on “Interview with a Pedipod”CONNECT WITH POSNAThe JPO PodcastFeaturing key articles from the journal each month, including discussions with authors and other experts.Interview with a PediPodConversations with leaders in the eld about their careers, philosophies, and more.

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LEVELS OF EVIDENCE10LEVELS OF EVIDENCE FOR PRIMARY RESEARCH QUESTIONS

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MEETING AT A GLANCE12LIVE SESSION WEDNESDAY MAY 13, 2020, 7-9:30 PM EDT (4-6:30 PM PDT)OPENING CEREMONYBASIC SCIENCE AWARD SESSIONCLINICAL AWARD SESSIONPRESIDENTIAL TRANSFERON DEMAND CONTENTOPEN DATE-WEDNESDAY, MAY 13PRE-COURSEYOUNG MEMBER FORUM*Program subject to change SCIENTIFIC PROGRAMTraumaInfections/TumorQSVISpineSports/TraumaUpper and Lower ExtremityNeuromuscularHipSYMPOSIA PROGRAMBone HealthPOGOPOPSPractice ManagementTraumaSUBSPECIALTY DAYHandFootHipNeuromuscularLower ExtremitySpineSportsTrauma

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13Dear Colleagues,On behalf of POSNA President Steven Albanese, MD and the 2020 Program Committee (Michelle Caird, MD, Woody Sankar, MD, and Matt Oetgen, MD, and I), we invite you to attend the virtual 2020 POSNA Annual Meeting starting May 13, 2020. Due to the COVID-19 outbreak, we have designed a virtual meeting with a combination of On Demand and Live content to facilitate presentation of the outstanding scientic program. CME credit will be awarded to attendees of the virtual meeting.A record number of abstracts (1,061) were submitted and graded by volunteer readers. All 170 podium presentations, 40 posters, and 80 ePosters are outstanding. Now in its 2nd year, there will be 17 surgical technique videos presented in the Video Theater. The virtual meeting structure follows: • A live session will kick off the meeting featuring the Basic Science and Clinical Award presentations on Wednesday May 13, 2020, 7:00-9:30 pm EDT (4:00-6:30 pm PDT) o The 2020 POSNA award winners will be announced, but will be formally recognized at the 2021 Annual Meeting in Dallas o A virtual presidential transfer will occur at the conclusion • On Demand content will be available via the virtual platform o Pre-Course, chaired by Noelle Larson, MD■ “Transition to Adulthood: Orthopedics for the Adolescent” o Scientic Program ■ Podium presentations, Video Theater, and ePosters (posters will be presented as ePosters) o Subspecialty Day Program, chaired by Woody Sankar, MD o Symposia Program■ “The Physis: From Basic Biology to Advanced Surgical Intervention“■ “Delivery of Pediatric Orthopaedic Global Outreach in 2020 and Beyond“■ “Pediatric Bone Health for the Orthopaedic Surgeon”■ “Enhancing Practice and Professional Development“■ “Disaster Response for the Pediatric Orthopaedic Surgeon” o 6th Annual Arabella Leet Young Member Forum, chaired by Megan Johnson, MD I would like to personally thank all that have been involved in planning and contributing to the meeting, including our San Diego hosts (Hank Chambers, MD, and Peter Newton, MD), the volunteer abstract reviewers, the meeting presenters and chairs, the program committee, and in particular, Tara Long, Theodora Heihn, Teri Stech and the rest of the POSNA team. This is a challenging time and we hope that you and your family remain safe and healthy. On behalf of POSNA, we appreciate your participation in the Virtual 2020 Annual Meeting. Sincerely, Jeff Martus, MDProgram ChairWELCOME

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14LIVE SESSIONLIVE SESSION WEDNESDAY MAY 13, 2020, 7-9:30 PM EDT (4-6:30 PM PDT) 7:00 PM–7:10 PM OPENING CEREMONY Stephen Albanese, MD BASIC SCIENCE AWARD – 45 minutesModerator: Michelle Caird, MD eModerator: Nancy Miller, MD7:11 PM–7:15 PM PAPER 66♦ Timing is Everything: Optimizing a Novel Pharmacologic Therapy for Contracture Prevention in Neonatal Brachial Plexus InjuryQingnian Goh, PhD; Athanasia Nikolaou, PhD; Kritton Shay-Winkler; Roger Cornwall, MDCincinnati Children’s Hospital Medical Center, Cincinnati, OH 7:16 PM–7:20 PM PAPER 67Collagen X Biomarker (CXM) is Predictive of Growth Cessation in Idiopathic ScoliosisMichelle Welborn, MD; Ryan Coghlan; Susan Sienko, PhD; William Horton, MDShriners Hospital for Children, Portland, OR 7:21 PM–7:25 PM PAPER 68Can Bisphosphonates Prevent Osteotomy Repair?Jonathan Schoenecker, MD, PhD; Stephanie Moore; Samuel Posey, MD; Masanori Saito, MDVanderbilt University Medical Center, Nashville, TN 7:25 PM–7:33 PM Discussion 7:34 PM–7:38 PM PAPER 69Sirt6 in Osteoblast/Osteocyte is Vital to Prevent Bone Deformity Induced by Ischemia Through Targeting VDR-RANKL SignalingYoung-Jae Moon; Sung Il Wang, MD; Jung-Ryul Kim, MDChonbuk National University, Jeonju, Jeollabuk-do, Republic of Korea 7:39 PM–7:43 PM PAPER 70Intraosseous 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, MDTexas Scottish Rite Hospital for Children, Dallas, TX 7:44 PM–7:48 PM PAPER 71Reverse Dynamizaton Accelerates Bone Healing in a Large Animal Osteotomy ModelChristopher Iobst, MD; Mikhail Samchukov, MD; Alexander Cherkashin, MD; Vaida Glatt; Satbir Singh, BSNationwide Children’s Hospital, Columbus, OH 7:48 PM–7:56 PM Discussion ♦ Indicates those faculty presentations in which the FDA has not cleared the drug and/or medical device for the use described (ie. the drug or medical device is being discussed for an “off label” use).

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LIVE SESSION, CONTINUED CLINICAL AWARDS – 83 minutesModerator: Michael Vitale, MD, MPH eModerator: Coleen Sabatini, MD, MPH7:57 PM–8:02 PM PAPER 56Long-Term Outcomes of Closed Reduction and Open Reduction with Innominate Osteotomy for Developmental Dislocation of the Hip: 45 Years at Two InstitutionsElizabeth Scott, MD; Stuart Weinstein, MD; Lori Dolan, PhDUniversity of Iowa, Iowa City, IA 8:03 PM–8:08 PM PAPER 57A Postoperative Protocol Reduces Opioids Prescribed after Pediatric Orthopaedic SurgeryKirsten Ross, MD; Joseph Gibian, BS; Jeffrey Martus, MD; David Johnson, MD; Megan Johnson, MDVanderbilt University Medical Center, Nashville, TN 8:09 PM–8:14 PM PAPER 58Probability Analysis of Sequential SCFE (PASS Score)Baruch Danino, MD; Satbir Singh, BS; Junxin Shi, MD, PhD; Jingzhen Yang, MD, PhD; Kevin Klingele, MDNationwide Children’s Hospital, Columbus, OH 8:14 PM–8:22 PM Discussion 8:23 PM–8:28 PM PAPER 59Marijuana Use Results in Increased Time to Union in Surgically Treated Pediatric Fracture PatientsDavid Heath, MD; James Miller; Caleb Davis, BS; Lynda Lee, BS; Rose Ann Huynh; Kush Shah, PhD; Grant Hogue, MDUniversity of Texas Health Science Center at San Antonio, San Antonio, TX 8:29 PM–8:34 PM PAPER 60A Multicenter Study of Intramedullary Rodding in Osteogenesis ImperfectaPeter Smith, MD; Mercedes Rodriguez Celin, MD; Karen Kruger, PhD; Angela Caudill, MPT; Gerald Harris, PhDShriners Hospital for Children, Chicago, IL 8:35 PM–8:40 PM PAPER 61Ultrasonic Bone Scalpel (USBS) Does Not Reduce Blood Loss in Adolescent Idiopathic Scoliosis (AIS): Randomized Clinical TrialSumeet Garg, MD; James Thomas, MD; Hannah Quick, BA; Patrick Carry, MS; Eun Kim, BA; Mark Erickson, MDChildren’s Hospital Colorado, Aurora, CO 8:40 PM–8:48 PM Discussion LIVE SESSION15

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16LIVE SESSION8:49 PM–8:54 PM PAPER 62Hunger 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, MDCampbell Clinic Orthopaedics, Memphis, TN 8:55 PM–9:00 PM PAPER 63Do 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, MDChildren’s Hospital Los Angeles, Los Angeles, CA 9:01 PM–9:06 PM PAPER 64Prospective Randomized Controlled Trial of Implant Density in AIS: Results of the Minimize Implants Maximize Outcomes StudyA. 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, MSUniversity of Minnesota, Minneapolis, MN 9:07 PM–9:12 PM PAPER 65Effect of Reducing Urban Speed Limit on Pedestrian Collisions: A Controlled StudyAndrew Howard, MD; Liraz Fridman, PhD; Linda Rothman, PhD; Brent Hagel, PhD; Marie Soleil Cloutier, PhD; Colin Macarthur, MBBSHospital for Sick Children, Toronto, Ontario, Canada 9:12 PM–9:20 PM Discussion 9:20 PM–9:30 PM PRESIDENTIAL TRANSFER Stephen Albanese, MD

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POSNA 2020 PRE-COURSE18TRANSITION TO ADULTHOOD: ORTHOPEDICS FOR THE ADOLESCENTChair: A. Noelle Larson, MDDESCRIPTION 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 considerations 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 by the ACCME to provide continuing medical education for physicians

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POSNA 2020 PRE-COURSE, CONTINUED19PROGRAM – 162 minutesWelcome and OverviewA. Noelle Larson, MD Upper Extremity Trauma Fracture in Girls 11-14 and Boys 13-15 – What Alignment is Acceptable at What Age? Pinning vs. PlatesMauricio Silva, MD Distal Radial Physeal Bar and Ulnar Overgrowth, Indications for Treatment, Epiphyseodesis vs. Ulnar Shortening Osteotomy in Adolescents Julie Samora, MD Both Bone Forearm Fractures – What Alignment is Acceptable at What Age? Nails vs. Plates?Christine Ho, MD Proximal Humerus Fractures – What Alignment is Acceptable in Children 10 and up? Pooya Hosseinzadeh, MD Lower ExtremityHas the Threshold for Epiphyseodesis vs. Lengthening Changed in the Era of Magnetically Controlled Rods?L. Reid Boyce Nichols MD, FAAOS Internal Fixation vs. Casting: Tibial Shaft Fractures in Adolescents Jeffrey Martus, MD A Foot to Last a Lifetime – Is Hindfoot Fusion Ever Appropriate for Pediatric Orthopedic Conditions? Derek Kelly, MD End-Stage Arthritis in the Teenage Hip: How to ReconstructEduardo Novais, MD Total Hip Arthroplasty for Teenagers and What Peds Ortho Surgeons Can Do to Optimize the Result Richard Santore, MD may be used for external trauma-related CMEs.

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POSNA 2020 PRE-COURSE, CONTINUED20 Spine Neuromuscular Minimally Ambulatory Patient – Fuse to the PelvisRachel Thompson, MD Neuromuscular Minimally Ambulatory Patient – Stop Short of the Pelvis Sumeet Garg, MD, FAAOS 45 Degree Skeletally Mature Athlete with Lumbar Curve with Oblique Takeoff + Leg Length Discrepancy – Observe Nicholas Fletcher, MD 45 Degree Skeletally Mature Athlete with Lumbar Curve with Oblique Takeoff + Leg Length Discrepancy – Fuse Ying Li, MD Surviving Adolescence Preoperative Considerations for Teenagers: DVT Prevention, Vaping, OCPs, SI, Drug Addiction: What Questions Can You Not Afford to Miss? Benjamin Shore, MD, MPH, FRCSC How to Practice Kind, Careful Medicine: Shared Decision-Making Juan Brito Campana, MD What is Happening in the Teenage Brain and How Best to Communicate? Ken Taylor, MD Long-Term Impact of Pediatric Orthopedic TreatmentRadiation Safety. . . How to Minimize Pediatric ExposureJeffrey Sawyer, MD Anesthesia Safety. . . Are We Causing ADHD?Lindsay Andras, MD Retained Implants? Can They Stay or Can They Go? Is There Systemic Harm from Metallosis? Michelle Caird, MD Screw Malposition. . . Are there Long-term Repercussions to Malpositioned Pedicle Screws?Terry Amaral, MD

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21 Transition to AdulthoodI Discharge My Patients at Age 18, This is Appropriate Purnendu Gupta, MD I Keep Seeing My Patients Long into Adulthood Steven Koop, MD What Happens to our Neuromuscular Patients in Adulthood: Pathway to Independence and Maximal Function Wade Schrader, MD POSNA 2020 PRE-COURSE, CONTINUED

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YOUNG MEMBER FORUM2020 ARABELLA LEET MEMORIAL YOUNG MEMBER FORUMChair: Megan Johnson, MDDESCRIPTION The 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.PROGRAM – 86 minutesWelcomeMegan Johnson, MD Arabella Leet MemorialMargaret Siobhan Murphy-Zane, MD Developing a Career Action Plan: Academic and Professional Advancement Stephen Albanese, MD Getting to Yes: Negotiation with your Practice and Administration David Skaggs, MD, MMM Mentors, Networking, and POSNA Michelle Caird, MD Success at Home and Work: How to be a Great Mom/Dad/SurgeonAmy McIntosh, MD Lessons Learned: Mistakes from My First 10 YearsJohn (Jack) Flynn, MD Concluding RemarksMegan Johnson, MD 23

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SPEAKERS & AWARD RECIPIENTS24BEHROOZ AKBARNIA, MDDISTINGUISHED ACHIEVEMENT AWARDBehrooz Akbarnia, M.D. graduated from Tehran University and continued his Orthopaedic Surgery residency at Albany Medical Center including a year of Pediatric Orthopaedics under Dr. Howard Steel in Philadelphia. He then com-pleted a Scoliosis Fellowship at Twin Cities Scoliosis Center with Dr. John Moe and colleagues. Dr. Akbarnia was Professor/Vice Chairman of the Department of Orthopaedic Surgery at St. Louis University and Chief of Pediatric Orthopaedics at Cardinal Glennon Children’s Hospital for 10 years before relocating to San Diego in 1990. There, he established his academic practice, created the San Diego Spine Fellowship Program and founded the San Diego Spine Foundation to support educational and research programs.Dr. Akbarnia’s interest has been focused on spinal deformity, especially Early Onset Scoliosis which started with POSNA Growing Rod Tutorials at Children’s Hospital, San Diego. He then worked with other colleagues to establish the Growing Spine Study Group. GSSG recently merged with CSSG to become Pediatric Spine Study Group (PSSG), creating the largest database of young children with spine deformity. In 2007, he established International Congress on Early Onset Scoliosis (ICEOS), which just held its 13th Annual Meeting. He has published several books including 2 editions of The Growing Spine Textbook (3rd Ed. in progress). His efforts have signicantly affected the lives of young children with spinal deformity around the world. He has helped many children globally with his innovations, developing new means for treating young children with EOS. His efforts comprise over 200 peer-reviewed publications, many book chapters, and presentations nationally and internationally. He has received the AAP Distinguished Service Award, SRS’s Blount Humanitarian and Lifetime Achievement Awards. He is past president of Scoliosis Research Society and currently a Clinical Professor of Orthopedic Surgery at University of California; San Diego. He and Nasrin married in 1968 and now reside in La Jolla, California. He is both proud father of three children and grandfather of ve. LORI KAROL, MD2020 PRESIDENTIAL GUEST SPEAKERDr. Lori Karol is currently the Assistant Chief of Staff and Chief Quality Ofcer at Texas Scottish Rite Hospital for Children, and professor of orthopaedic surgery at the University of Texas-Southwestern in Dallas. She is the medical director of the movement science laboratory. She earned her undergraduate and medical degrees at the University of Michigan, and served her orthopaedic residency at Wayne State University in Detroit. Dr. Karol completed a fellowship in pediatric orthopaedics and scoliosis at the Texas Scottish Rite Hospital in Dallas. She served as the president of the Pediatric Orthopaedic Society of North America in 2015-2016. Her clinical areas of interest include scoliosis, clubfoot, and the orthopaedic management of cerebral palsy. She has au-thored 93 peer reviewed manuscripts on topics ranging from early onset scoliosis, the orthotic man-agement of scoliosis, the application of gait analysis in clubfoot. She has lectured widely both national-ly and internationally. She credits her success to the team at Scottish Rite, especially Tony Herring, who has served as a mentor throughout her career. Lori has been married to Bob Karol for 35 years, and has three lovely and successful daughters, Molly, Leah, and Abby.

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SPEAKERS & AWARD RECIPIENTS, CONTINUED25DONALD BAE, MDSPECIAL EFFORT AND EXCELLENCE AWARDDonald S. Bae, MD is a Professor of Orthopaedic Surgery at Harvard Medical School and Attending Surgeon at Boston Children’s Hospital. He also serves as co-director of the Harvard Hand and Upper Extremity Fellowship, Associate Clini-cal Director of the SimPeds Program at Boston Children’s Hospital, and Associate Program Director of the Harvard Combined Orthopaedic Surgery Residency. After completing his undergraduate and medical school degrees at Harvard, Dr. Bae completed orthopaedic surgery residency in the Harvard Combined Orthopaedic Residency Program. He joined the faculty at Boston Children’s Hospital after fellowship training in both pediatric orthopaedics and hand surgery. Clinically, Dr. Bae specializes in congenital, traumatic, neuromuscular, and sports-related conditions of the hand and upper limb.In addition to patient care, his clinical research focuses on pediatric upper limb conditions, including congenital differences of the hand. Dr. Bae currently serves as PI of a multicenter prospective longi-tudinal cohort study of children and adolescents with distal radius fractures, supported by a POSNA Quality-Safety-Value grant. He is co-PI of a multicenter prospective registry of congenital hand dif-ferences, with currently over 2,500 patients enrolled across seven institutions in North America. Most recently, he has helped form a multicenter effort studying osteochondritis dissecans of the elbow.A devoted member of the Pediatric Orthopaedic Society of North America, Dr. Bae has previously served on the POSNA Board of Directors as the junior member-at-large, as chair of the Educational Courses Committee, and most recently Director of the International Pediatric Orthopaedic Symposium.

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SPEAKERS & AWARD RECIPIENTS, CONTINUED26CHARLES E JOHNSTON, MDHUMANITARIAN AWARDAfter growing up in the 50’s&60’s in Southern California, Charlie Johnston left the Beach Boys/Jan&Dean for the right coast attending Yale, Columbia P&S, and U.Va. before coming full circle back to Texas where family ancestors rst immigrated to south Texas in the 1870’s. After fellowship at TSRH with Tony Herring and Dennis Wenger and a brief stint at LSU NOLa, he has had but one job, secured only with a handshake, since 1985, and attributes his medical “attitude” directly to the TSRH philosophy that provides the most expert care available anywhere to any child with an orthopedic condition, without regard to the cost – actually, there was no billing dept.at TSRH - or amount of time to complete the task. Having known and been mentored by many giants – the aforementioned Herring and Wenger, Luque, Dubousset, Coleman, Hall, Goldner, Gillespie, Dimeglio, to name a few - it didn’t take much to transport all that knowledge and expertise to patients unable , through geographic or political iso-lation, to access care and escape the debilitation and impairment of neglected treatable conditions. The goal however was not to simply swoop in, operate, and be back in the ofce by Monday, but to identify, train and mentor local orthopods who could then effectively treat their own population while minimizing the effects of neglect and incompetence. He was rst challenged to venture to the Moski-to Coast, Honduras to treat children who could only be reached by air or water – no roads existed to connect to the usual “mission” sites in San Pedro Sula or inland. Then an opportunity to build a spine deformity program in the West Bank, Palestinian Territory arose through the auspices of Hugh Watts and The Palestine Childrens Relief Fund(PCRF). There were no local physicians in Moskito environs, so those patients had to be brought to Dallas for surgery and rehab….but once we penetrated the physical and political isolation of Palestine, it was just a matter of enlisting other US mentors and an Israeli colleague to develop now three well-trained and competent “residents” who engage as COUR scholars and who have become our junior colleagues locally. The message: there are probably an innite number of patients and places needing POSNA expertise, and many are covered by regularly-visiting brigades. But imagine the efciency and the benet when you can teach, train and turn over care to someone who lives locally and becomes the pediatric orthopedist for their community, region, even nation. The value of having local pediatric orthopedic colleagues with real “skin in the game” is a worthy goal for POSNA colleagues who can commit more to the patients who are otherwise reliant only on the visiting brigades and Mercy ships or have the means to travel to come to us.

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Stanford Excellence in ActionOur Presentations:Using Data-Driven, Principled Negotiation with a Clinician-Integrated Approach to Achieve Best Values on Spinal Implants | Kevin Shea, MDDoes Navigation Make Spinal Fusion for Adolescent IdiopathicScoliosis Safer? Insights from 17,400 Cases in a National Database | John Vorhies, MDOur Posters and Abstracts:Opioid Re-Prescription Following ACL Reconstruction isAssociated with Subsequent Opiate Use Disorders John Vorhies, MDCast Univalve Location Matters: Determines Pressure at theThree-Point Mold | Stephen Frick, MDA Quality Improvement Project to Reduce the Use of Combination Acetaminophen-Opioid Medications within a Large Health System | Kevin Shea, MDNo Correlation between Healthcare System Device Volumeand Price Paid for Spinal Implants in a National Database | Kevin Shea, MDTechnique for Elongation, Derotation, Flexion Casting Using a Modified Jackson Table | John Vorhies, MDLearn more at ortho.stanfordchildrens.org or by calling (844) 41-ORTHO.038033_Update POSNA ad 2020_2020-03-31_D1.indd 1 3/31/20 12:04 PM

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28PRESENTATIONSTRAUMA – 24 minutesPAPER 1 22 Years of Pediatric Musculoskeletal Firearm Injuries: The Carnage Continues Richard Schwend, MD; Emily Boschert, BA; Connor Stubbleeld, BS; Kimberly Reid, MSChildren’s Mercy Hospital, Kansas City, MO PAPER 2 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, MDNemours / A.I. duPont Hospital for Children, Wilmington, DE PAPER 3 Age-Based Screening for Non-Accidental Trauma in Children Less than 3 Years Old with Femur FractureRaheel Ali, MD; Varun Bora; Lorenzo Deveza, MD; Angela Bachim, MD; Binita Patel, MD; Scott Rosenfeld, MDTexas Children’s Hospital, Houston, TX PAPER 4 Fracture Characteristics Predict Suboptimal Alignment in Pre-School Femur Fractures Treated in a Spica CastAmirhossein Misaghi, MD; Mahmoud Mahmoud, MD; Alexandre Arkader, MD; Keith Baldwin, MDChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 5 Sagittal Plane Residual Deformity in Pediatric Type II Supracondylar Humerus Fractures Mauricio Silva, MD; Matthew Day, BS; Bianka Aceves-Martin, BS; Edward Ebramzadeh, PhDOrthopaedic Institute for Children, Los Angeles, CA PAPER 6 Operative Versus Non-Operative Management of Acute Pediatric Monteggia Injuries with Complete Ulna FracturesMauricio Silva, MD; Christopher Hart, MD; Joshua Bram, BS; Alexandre Arkader, MDUCLA/Orthopaedic Institute for Children, Los Angeles, CA INFECTIONS AND TUMOR – 24 minutesPAPER 7Abbreviated Non-contrast Imaging Protocol Decreases Costs and Improves Value in Treatment of Pediatric Musculoskeletal InfectionTodd Blumberg, MD; Shing Varakitsomboon, BS; Viviana Bompadre, PhD; Mahesh Thapa, MD; Sarah MenasheSeattle Children’s Hospital, Seattle, WA may be used for external trauma-related CMEs.

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29PRESENTATIONS, CONTINUEDINFECTIONS AND TUMOR, CONTINUEDPAPER 8Surgical Management of Children with Osteomyelitis Results in Signicantly Greater Identication of the Causative Organism: Results from the CORTICES Multicenter DatabaseVidyadhar Upasani, MD; Brian Brighton, MD; Rachel Goldstein, MD; Benton Heyworth, MD; Mark Miller; Julia Sanders, MD; Jonathan Schoenecker, MD, PhD; Walter Truong; Cortices Study GroupRady Children’s Hospital San Diego, San Diego, CA PAPER 9Can 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 MooreVanderbilt University Medical Center, Nashville, TN PAPER 10Pediatric Chondroblastoma and the Need for Chest StagingAlexandre Arkader, MD; Amy Williams, MD; Odion Binitie, MD; Mihir Thacker, MD; German Farfalli, MDChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 11Synthetic Bone Graft Substitute for Treatment of Unicameral Bone Cysts: Preliminary ResultsJohn Williams, MD; Carl Nunziato, MD; Ronald Williams, MDDell Children’s Medical Center, Austin, TX PAPER 12 Low Rate of Healing and High Incidence of Complications in Benign Pediatric Bone Tumors Treated with Synthetic Calcium Sulfate-Calcium Phosphate Bone GraftKenneth Illingworth, MD; Ali Siddiqui, BS; Lindsay Andras, MD; Bensen Fan, MD; James Bennett, MD; Vernon Tolo, MD; David Skaggs, MD, MMMChildren’s Hospital Los Angeles, Los Angeles, CA QSVI – 52 minutesPAPER 13Improving Patient-Family Experience in Pediatric Ambulatory OrthopaedicsJames McCarthy, MD; Andrea Shaffer Ellis, RN; Carie Norris, RN; Sandy Singleton, MBA; Jennifer Anadio, MACincinnati Children’s Hospital, Cincinnati, OH PAPER 14Improving Access to Care by Implementing LEAN Methodology in a Pediatric Orthopaedic ClinicRon 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, PTIWK Health Centre, Halifax, Nova Scotia, Canada

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PRESENTATIONS, CONTINUEDQSVI, CONTINUEDPAPER 15Rational Electronic Medical Record Template Design and Implementation Improves Documentation QualitySasha Carsen, MD, MBA, FRCSC; Christopher Mattice, PhD; Andrew Tice, MD; Holly Livock, MSc; Kevin Smit, MDCHEO, Ottawa, Ontario, Canada PAPER 16Implementation of a Venous Thromboembolic in a Pediatric Orthopaedics: High Rates of High Risk PatientsHenry Ellis, MD; Meagan Sabatino, BA; Kerry Wilder, RN, MBA; Charu Sharma, MDTexas Scottish Rite Hospital for Children, Dallas, TX PAPER 17Use of Virtual Reality Distraction to Manage Anxiety During Cast Removal in Children: A Prospective, Randomized TrialMark Sinclair, MD; Paige Chase, MS; Julia Leamon, RN; Ashley Sherman, MAChildren’s Mercy Hospital, Kansas City, MO PAPER 18 Virtual Reality (VR) to Reduce Pain and Anxiety in the Pediatric Orthopaedic Outpatient Setting: A Randomized Controlled TrialBejaan Jivraj, MBBS; Emily Schaeffer, PhD; Jeffrey Bone, MSc; Chelsea Stunden, MPH; Eva Habib, BS; John Jacob, MSc; Kishore Mulpuri, FRCSCBC Children’s Hospital, Vancouver, BC, Canada PAPER 19A Negative Workplace Culture is Associated with Burnout in Pediatric Orthopaedic SurgeonsCordelia Carter, MD; Vishwas Talwalkar, MD; Jennifer Weiss, MD; Richard Schwend, MD; Michael Goldberg, MDNYU-Langone Medical Center, New York, NY PAPER 20Infection Prevention Pathway for Scoliosis: What is Necessary for Success?William Randall; Benjamin Martin, MD; Shannon Kelly, MD; Matthew Oetgen, MDChildren’s National Hospital, Washington, DC PAPER 21Using Data-Driven, Principled Negotiation with a Clinician-Integrated Approach to Achieve Best Values on Spinal ImplantsEli 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, MDStanford School of Medicine, Stanford, CA may be used for external trauma-related CMEs.30

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PRESENTATIONS, CONTINUEDQSVI, CONTINUEDPAPER 22Re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 ShahChildren’s Hospital of Philadelphia, PA PAPER 23Pills at Home: Teenagers Report Pain and Opioid Usage Following Posterior Spinal Fusion in AIS Using Text MessagingNishank Mehta, BA; John (Jack) Flynn, MD; Daniel Miller, MD; Wudbhav (Woody) Sankar, MD; Patrick Cahill, MD; Faris Fazal, BS; Apurva Shah, MD, MBAChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 24Decreasing Overall Narcotic Load in a Pediatric Population Using Standardized Home Going Postoperative Pain Management StandardizationKerwyn Jones, MD; Laurie EnglerAkron Children’s Hospital, Akron, Ohio PAPER 25Safely Reducing Unnecessary Radiographs in Suspected Pediatric Musculoskeletal Injuries Through a Multidisciplinary Developed AlgorithmSarah Lander MD; Julie Michels; Anne Brayer MD; Sarah Obudzinski; Taylor D’Amore BA; Mitchell Chess MD; Derek Wakeman MD; P. Cook MD; James Sanders MDUniversity of Rochester, Rochester, New York SPINE – 60 minutesPAPER 26♦ Surgical Complications of Anterior Vertebral Body Growth Modulation for Skeletally Immature Patients with Idiopathic ScoliosisStefan Parent, MD; Abdulmajeed Alzakri, MD; Marjolaine Roy-Beaudry, MSc; Isabelle Turgeon, BS; Marie Beausejour, PhD; Olivier Turcot, MDCHU Sainte-Justine, Montreal, Quebec, Canada PAPER 27♦ Anterior Vertebral Body Tethering vs. Posterior Spinal Fusion for Adolescent Idiopathic Scoliosis: Results of a Surgeon-Sponsored FDA IDE StudyTodd Milbrandt, MD; Smitha Mathew, MBBS; A. Noelle Larson, MD; Donald Potter, MDMayo Clinic, Rochester, MN PAPER 28Anterior Vertebral Body Tethering Shows Mixed Results at 2-Year Follow UpKevin Neal, MD; Courtney Baker, MD; Gary Kiebzak, PhDNemours, Jacksonville, FL ♦ Indicates those faculty presentations in which the FDA has not cleared the drug and/or medical device for the use described (ie. the drug or medical device is being discussed for an “off label” use).31

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PRESENTATIONS, CONTINUEDSPINE, CONTINUEDPAPER 29Comparison of Traditional Growth Friendly Surgeries and Magnetically Controlled Growing Rods for the Treatment of Early Onset Scoliosis in Patients with Cerebral PalsyMargaret 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, MDDalhousie University, Halifax, Nova Scotia, Canada PAPER 30Five Year Radiographic Outcomes Following Discontinuation of Growth Friendly Surgery for Early Onset ScoliosisRobert 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, MDMedical University of South Carolina, Charleston, SC PAPER 31What’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 ScoliosisYing 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 GroupC.S. Mott Children’s Hospital, Michigan Medicine, Ann Arbor, MI PAPER 32Validation of the Early Onset Scoliosis Questionnaire (EOSQ) as Applied to the Classication of Early Onset Scoliosis (C-EOS) Etiology Designation Before Scoliosis TreatmentBrandon Ramo, MD; Anna McClung, RN; Chan-Hee Jo, PhD; Burt Yaszay, MD; Lindsay Andras, MD; Matthew Oetgen, MDTexas Scottish Rite Hospital, Dallas TX PAPER 33Is 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; Craig Birch, MDBoston Children’s Hospital, Boston, MA PAPER 34Age Stratied Outcomes of Mehta Casting in a Large Multi-Center Cohort of Idiopathic Early-Onset Scoliosis PatientsGraham Fedorak, MD; Bruce MacWilliams; Michal Szczodry, MD; Peter Stasikelis, MD; Joel Lerman, MD; Joshua Pahys; Kim Hammerberg, MDShriners Hospitals for Children-Salt Lake City, Salt Lake City, Utah 32

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PRESENTATIONS, CONTINUEDSPINE, CONTINUEDPAPER 35Serious Perioperative Adverse Events After Pediatric Cervical Spine FusionsBram Verhofste, MD; Nora O’Neill, BA; Michael Hresko, MD; John Emans, MD; Daniel Hedequist, MDBoston Children’s Hospital, Boston, MA PAPER 36Modied Proximal Humerus Physeal Classication System for Growth Prediction in ChildrenBrian 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, BSTexas Children’s Hospital, Houston, TX PAPER 37The Relationship of Olecranon Apophyseal Ossication and Sanders Hand Scores to the Timing of Peak Height Velocity in AdolescentsJanelle Greene, MD; Don Li; Kristin Yu, BA; Raymond Liu, MD; Daniel Cooperman, MDYale University School of Medicine, New Haven, CT PAPER 38Deformity Angular Ratio is Associated with Neuromonitoring Changes without a Vertebral Column Resection: Spinal Deformity is More Inuential than Type of SurgeryKenneth Illingworth, MD; Ali Siddiqui, BS; David Skaggs, MD, MMM; Lindsay Andras, MDChildren’s Hospital Los Angeles, Los Angeles, CA PAPER 39The Axial Spinal Cord Classication Is Associated with Intraoperative Neurologic Alerts for Pediatric Scoliosis PatientsSmitha Mathew, MBBS; Todd Milbrandt, MD; William Shaughnessy, MD; Anthony Stans, MD; A. Noelle Larson, MDMayo Clinic, Rochester, MN PAPER 40Preoperative 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, MDChildren’s Hospital of Philadelphia, Philadelphia, PA SPORTS/TRAUMA – 60 minutesPAPER 41Use Caution When Assessing Pre-Operative Leg Length Discrepancy in Pediatric Patients with Acute Anterior Cruciate Ligament InjuriesLindsay Schlichte, MS; Peter Fabricant, MD; Christine Goodbody, MD; Frank Cordasco; Daniel Green, MDHospital for Special Surgery, New York, NY 33

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PRESENTATIONS, CONTINUEDSPORTS/TRAUMA, CONTINUEDPAPER 42Comparing the Relative Utility of Wrist and Tibial Tubercle Apophysis X-Rays in Determining Skeletal Age in Pediatric Patients Undergoing ACL ReconstructionMihir Dekhne, MS; Isabelle Kocher, BA; Kathryn Williams, MS; Saritha Sankarankutty; Benton Heyworth, MD; Matthew Milewski, MD; Mininder Kocher, MD, MPHBoston Children’s Hospital, Boston, MA PAPER 43Quadriceps Tendon Autograft for Pediatric Anterior Cruciate Ligament Reconstruction Results in Less Graft Failure and Meniscus Re-injuryTyler Hall, BA; Carly Strohbach, BA; Kiana King; Luciano Lazzaretto; Craig Finlayson; Neeraj Patel, MDAnn & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL PAPER 44Association Between Psychological Readiness, 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, MDBoston Children’s Hospital, Boston, MA PAPER 45Comparison of 6-Month Return to Sports Assessments Following ACL Reconstruction in Male vs. Female Adolescents: A Matched, Sex-Based Cohort Analysis of 543 PatientsKathleen Maguire, MD; Dai Sugimoto; Lyle Micheli, MD; Mininder Kocher, MD, MPH; Benton Heyworth, MDBoston Children’s Hospital, Boston, MA PAPER 46Cost-Effectiveness for Return-To-Play (RTP) Programs after Anterior Cruciate Ligament ReconstructionChristopher Defrancesco, MD; Drake Lebrun, MD; Joseph Molony, PT; Madison Heath, BS; Peter Fabricant, MDHospital for Special Surgery, New York, NY PAPER 47POSNA Surgeons Warning: Multicenter Study Reveals Arthrobrosis Incidence After Operative Management of Tibial Spine Fractures Higher than Previously ReportedJoshua 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, MDChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 48Do Not Discount Non-Operative Treatment: Factors Associated with a Successful Closed Reduction of a Tibial Eminence FractureHenry Ellis, MD; Morgan Adkins, BS; Marilyn Elliot, BS; Sharon Huang, BA; Charles Wyatt, NP; Philip Wilson, MDTexas Scottish Rite Hospital for Children, Dallas, TX may be used for external trauma-related CMEs.34

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PRESENTATIONS, CONTINUEDSPORTS/TRAUMA, CONTINUEDPAPER 49A Comparison of Non-Operative and Operative Treatment of Type II Tibial Spine FracturesNiyathi 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, MDJohns Hopkins University, Baltimore, MD PAPER 50Outcomes of Pediatric Acetabular Fractures Managed Operatively: Results of a Large, Consecutive Series of Patients from 2 Large Academic Medical CentersEvan 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, MDUniversity of Alabama at Birmingham, Birmingham, AL PAPER 51Expert Consensus for a Principle-Based Classication in Treatment of Diaphyseal Pediatric Femur FracturesDaniel Weltsch, MD; Keith Baldwin, MD; Divya Talwar, MPH; John (Jack) Flynn, MDChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 52Dorsal-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, MDCincinnati Children’s Hospital Medical Center, Cincinnati, OH PAPER 53Incidence of Compartment Syndrome and Fasciotomy and Associated Risk Factors in Children with Supracondylar Fractures of the ElbowDouglas Armstrong, MD; Rhett Macneille, MD; Erik Lehman, MS; William Hennrikus, MDPennState Hershey Medical Center, Hershey, PA PAPER 54Prospective, Randomized, Blinded Trial Demonstrates Decreased Pain During Supracondylar Pin Removal with Noninvasive Electrotherapy Stimulation Compared to PlaceboNatalya Sarkisova; Rachel Goldstein; Erin Meisel, MD; Nina Lightdale-Miric, MD; David Skaggs, MD, MMM; Lindsay Andras, MDChildren’s Hospital Los Angeles, Los Angeles, CA PAPER 55Is the Pendulum Swinging in the Right Direction? Displaced and Non-Displaced Supracondylar Humerus Fractures Have Similar Functional Outcomes with CastingRushyuan Lee, MD; Alexandra Dunham; Walter Klyce, MD; Ranjit Varghese, MD; Alvaro Ibaseta, MS; Caleb Gottlich, BS; Francisco Eguia, BAJohns Hopkins, Baltimore, MD may be used for external trauma-related CMEs.35

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Expert Spine Care from Simple to Complex “Our overall volume lends us a degree of clinical expertise that isn’t seen in other institutions in the region or the state.”—Tenner Guillaume, MD, spine surgeon at GilletteGillette Children’s Specialty Healthcare is internationally recognized for treating pediatric spine conditions. From innovative procedures to pioneering research—Gillette has the expertise to help kids.Learn more: gillettechildrens.org/spineorthoTo make an appointment: 651-290-8707

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372020 SYMPOSIA PROGRAM PEDIATRIC BONE HEALTH FOR THE ORTHOPAEDIC SURGEON – 90 minutesCo-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 recurrent 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 supplementation. Welcome Barbara Minkowitz, MD Bone Health: Quality vs. Quantity Alessandra Carriero, PhD Bone Acquisition During Childhood & AdolescenceL. Reid Boyce Nichols, MD Treating Children with Fragility FracturesLaura Tosi, MD Bone Health in Trauma Christen Russo, MD Bone Health in the Young Athlete Jenn Beck, MD Metabolic Considerations for Deformity CorrectionChristopher Iobst, MD Protocols for SupplementationJulie Samora, MDSYMPOSIA PROGRAMmay be used for external trauma-related CMEs.

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SYMPOSIA PROGRAM, CONTINUED38PEDIATRIC ORTHOPEDIC GLOBAL OUTREACH (POGO) DELIVERY OF OUTREACH CARE IN 2020 AND BEYOND – 130 minutesCo-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, Coordination, 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 present 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. Welcome and Introduction to SymposiumEric Fornari, MD (POGO Chair) Resources for Orthopaedic Surgeons Interested in Getting Involved. How POGO Can Help You!Michael Heffernan, MD (POGO Vice-Chair) An Orthopedic Journey in a Low Income Country and the Way Forwardfor Long Term Sustainable Change: The Haitian ExperiencePierre Marie Woolley, MD Development of “Care Pathways” Kevin Shea, MD Development of Registry/Multicenter Research? How to Help Start a Research Program in Resource Limited EnvironmentsKishore Mulpuri, MD Current Pediatric Orthopedic Programs. This is How We Run our Program…Matthew Schmitz, MD – EcuadorCollin May, MD – ColombiaMaryse Bouchard – VietnamJosh Murphy – El SalvadorMark Barry – TanzaniaGerald Harris – Colombia, Mumbai, Manila and Mexico City

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SYMPOSIA PROGRAM, CONTINUED39POPS THE PHYSIS: FROM BASIC BIOLOGY TO ADVANCED SURGICAL INTERVENTION – 90 minutesCo-Chairs: Jessica Staschak, CPNP and Ray Kleposki, CPNPPOPS is pleased to offer a symposium on “the physis”. The 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. Physeal Biology and Fracture RepairJonathan Schoenecker, MD, PhD Genetic and Traumatic Diagnoses that Impact the PhysisJorge Fabregas, MD Surgical Intervention to Address Physeal PathologyDavid Podeszwa, MD

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SYMPOSIA PROGRAM, CONTINUED40PRACTICE MANAGEMENTENHANCING PRACTICE AND PROFESSIONAL DEVELOPMENT – 90 minutesCo-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. Experts will share their knowledge and personal experience on the topics. CODING AND BILLING UPDATE WelcomeWade Shrader, MD Proposed E&M Coding ChangesDale Blasier, MDBrien Rabenhorst, MD Fracture BillingKevin Neal, MD Shared Billing with PA/NPKevin Neal, MD PROFESSIONAL AND PRACTICE DEVELOPMENT Balancing Academic Advancement and Productivity John (Jack) Flynn, MD Value of MPH/MBAMininder Kocher, MD, MPH How to Foster/Integrate Junior PartnersJohn Lubicky, MDDaniel Grant, MD Negotiations – How to be Your Own AdvocateMike Jofe, MD

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SYMPOSIA PROGRAM, CONTINUEDTRAUMA DISASTER RESPONSE FOR THE PEDIATRIC ORTHOPAEDIC SURGEON – 109 minutesCo-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 community. 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. Pediatric Mass Casualty Care ConsiderationsMark Sinclair, MD Joint Commission and Centers for Medicare and Medicaid Services: Why They Care About This Topic and What Are the Rules in 2020Susan Scherl, MDStandards of Care in a Crisis-What You Need to Know and Do Robert Wineld, MDBoston Marathon Bombing: What Worked and What Didn’tBenjamin Shore, MD, MPH, FRCSC Hurricane Katrina: What Worked and What Didn’tRaoul Rodriguez, MDSchool Shootings: Columbine, Sandy Hook, and Parkland: What Have We Learned?Stephanie Holmes, MDMass Casualty Simulations: Best Ways to Prepare for DisasterRobert Wineld, MD2010 Haiti Earthquake: Disaster Response Goes InternationalScott Nelson, MD2020 COVID-10 Pandemic: How to Respond with Resource LimitationsEric Fornari, MDPreparing Yourself, Your Department, and Your Hospital to Provide a Well-Organized Disaster ResponseChris Souder, MDCommunity and Regional Considerations in Disaster Response PreparednessRobert Wineld, MD 41may be used for external trauma-related CMEs.

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Future IPOS Meetings December 1- 5, 2020 December 7-11, 2021Orlando, FL Orlando, FLAre you a POSNA Member?1,400+ 50POSNA Members from CountriesPOSNA Membership BenetsWith 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 posna.org/Resources/Traveling-Fellowship. • 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.POSNA Education and Resources• POSNA Annual Meeting• IPOS (International Pediatric Orthopaedic Symposium)• POSNA Mentorship Program• Webinars• Tutorials• POSNAcademy.org: Pediatric Orthopaedic Online Learning Portal• OrthoKids.org: 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.Apply today to join over 1,400 of your friendsand colleagues in one of the most diverse orthopaedic subspecialty societies.

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2020 SUBSPECIALTY DAY PROGRAMHAND SUBSPECIALTY DAY – 59 minutesCo-Chairs: Claire Manske, MD and Lindley Wall, MDConditions of the pediatric upper limb span from congenital to traumatic presentations, and creates challenging, and at times, controversial treatment approaches. This session will include presentation of 6 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 lively discussion of treatment approaches by the expert panel. Pre-operative assessment, surgical technique, and pure opinion (somewhat literature based) will be discussed and debated. PAPER 72Trapezius Muscle Activity in Children and Adolescents with Chronic Obstetrical Brachial Plexus Birth PalsyJasmine 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, MDRutgers New Jersey Medical School, Newark, NJ PAPER 73Contractures in Brachial Plexus Birth Injury Are a Problem of Muscle Length, not Muscle Strength: Translating Findings from an Animal Model to HumansAthanasia Nikolaou, PhD; Jason Long, PhD; Kendra Eckstein, BS; Roger Cornwall, MDCincinnati Children’s Hospital Medical Center, Cincinnati, OH PAPER 74Carpal Tunnel Syndrome in Mucopolysaccharidosis Type II [Hunter Syndrome] and the Effect of Enzyme Replacement TherapyBenan Dala-Ali, FRCS (Ortho); Shivan Jassim, MBBS; Alexios Iliadis, MBBS; Vasiliki Tsiokou, MBBS; Deborah Eastwood, FRCSGreat Ormond Street Hospital, London, United Kingdom PAPER 75A Comparative Analysis of 150 Thumb Polydactyly Cases Using the Wassel-Flatt, Rotterdam, and Chung ClassicationsCharles 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, MDGillette Children’s Specialty Healthcare, Minneapolis, MN PAPER 76Association of Radial Longitudinal Deciency and Thumb Hypoplasia: An Update Using the Congenital Upper Limb Differences (CoULD) RegistryMichelle James, MD; Malka Forman, BS; Maria Canizares, MD; Deborah Bohn, MD; Julie Samora, MD; Suzanne Steinman; Lindley Wall, MD; Andrea Bauer, MDBoston Children’s Hospital, Boston, MA PAPER 77Functional Workspace of Reconstructed Hypoplastic ThumbsPatrick Curran, MD; Madeleine Ball, BS; Anita Bagley, PhD; Mary Manske, MD; Laura Lewallen, MD; Mitell Sison-Williamson, MS; Michelle James, MDShriners Hospitals for Children Northern California, Sacramento, CA 43POSNA Research• POSNA funded Research Grants• Industry funded Research Grants • Foundation funded Awards

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SUBSPECIALTY DAY PROGRAM, CONTINUEDHAND SUBSPECIALTY DAY, CONTINUEDCASES/DIDACTICSPanel: Kevin Little, MD and Apurva Shah, MDModerators: Claire Manske, MD and Lindley Wall, MDCase 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.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.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.Case 4 and discussion14 year-old with medial epicondyle non-union. Work through treatment options and subsequent com-plications; discuss approach to optimizing motion and function through surgical decision making. FOOT/ANKLE SUBSPECIALTY DAY – 44 minutesCo-Chairs: Derek Kelly, MD and Jennifer Laine, MDTo 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 proce-dures either do not give adequate correction or allow for early recurrence. 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. 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 indicatedPAPER 78The Development of a Clubfoot Outcome Score for Ponseti Treated Idiopathic Clubfeet: Results of a Pilot Study with 40 Unilateral ClubfeetChristine Douglas, CPS; Roisin Delaney; Neil Segaren, FRCS (Ortho); Matt Thornton; Sally Tennant, MDRoyal National Orthopaedic Hospital, Stanmore, UK, United Kingdom 44

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SUBSPECIALTY DAY PROGRAM, CONTINUEDFOOT/ANKLE SUBSPECIALTY DAY, CONTINUEDPAPER 79Pedobarographic and Ankle Kinematic Analyses of Idiopathic Clubfoot after a Soft Tissue Release ProcedureNoppachart Limpaphayom, MDFaculty of Medicine, Chulalongkorn University, Bangkok, Thailand PAPER 80Functional Implications of the Flat-Topped Talus Following Treatment of Idiopathic Clubfoot DeformityMatthew Siebert, BS; Jacob Zide, MD; Claire Shivers, BS; Kirsten Tulchin-Francis, PhD; Wilshaw Stevens, BS; Justine Borchard, BS; Anthony Riccio, MDTexas Scottish Rite Hospital for Children, Dallas, TX PAPER 81Do We Really Need to Worry About Calcaneocuboid Subluxation During Lateral 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, MDTexas Scottish Rite Hospital for Children, Dallas, TX PAPER 82Redening the Juvenile BunionCaitlin Hardin, DO; Jacob Zide, MD; Claire Shivers, BS; Kirsten Tulchin-Francis, PhD; Chan-Hee Jo, PhD; Anthony Riccio, MDTexas Scottish Rite Hospital for Children, Dallas, TX PAPER 83Proximal Fifth Metatarsal Fracture Review and Healing OutcomesHannah Lee; Matthew Buczek, BS; Divya Talwar, MPH; Bernard Horn, MD; Richard Davidson, MDChildren’s Hospital of Philadelphia, Philadelphia, PA To Fuse or Not to Fuse? The Limits of Joint Sparing in Hindfoot DeformitiesMaryse Bouchard, MD To Fuse or Not to Fuse? The ForefootMichael Conklin, MD 45

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46SUBSPECIALTY DAY PROGRAM, CONTINUEDHIP SUBSPECIALTY DAY – 61 minutesCo-Chairs: Travis Matheney, MD and Rachel Goldstein, MDThis session will have two aims. The rst will be to provide a comprehensive 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. PAPER 84Development and External Validation of a Novel Clinical Score to Quantify the Presence of Instability Characteristics in Patients with Borderline Acetabular DysplasiaMaria Schwabe, BS; Elizabeth Graesser, MD; Lee Rhea, PhD; Cecilia Pascual-Garrido, MD; ANCHOR Study Group; John Clohisy, MD; Jeffrey Nepple, MDWashington University Department of Orthopaedic Surgery, Saint Louis, MO PAPER 85Modied Dunn Procedure for Stable Slipped Capital Femoral Epiphysis (SCFE) – 100 Cases with a Minimum of 1-Year Follow-upOliver Birke, FRACS; Justine St George, MBBS; Paul Gibbons, MBBS; David Little, MBBS, FRACS, PhDThe Childrens Hospital at Westmead, Sydney, NSW, Australia PAPER 86Borderline Acetabular Dysplasia: Three-Dimensional Deformity Predictors of the Diagnosis of Symptomatic Instability Treated with Periacetabular OsteotomyJohn Clohisy, MD; Elizabeth Graesser, MD; Maria Schwabe, BS; Cecilia Pascual-Garrido, MD; Jeffrey Nepple, MDWashington University School of Medicine, Saint Louis, MO PAPER 87FAI Surgery in the Adolescent Patient Population: Mild Deformities and Lack of Sports Participation are Associated with an Increased Risk of Treatment FailureYi-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, MDWashington University School of Medicine, Saint Louis, MO PAPER 88Increased Biomarker Levels of Cartilage Breakdown and Inammation are Present in Patients with Stable Slipped Capital Femoral EpiphysisDevon Nixon, MD; Perry Schoenecker,MD; Craig Smith, MD; Meghan Merklein, MD; John Clohisy, MD; Jeffrey Nepple, MDWashington University School of Medicine, Saint Louis, MO PAPER 89Do 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, MDTexas Scottish Rite Hospital for Children, Dallas, TX

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47SUBSPECIALTY DAY PROGRAM, CONTINUEDHIP SUBSPECIALTY DAY, CONTINUEDThe Future of Arthrosis in Hip Preservation SurgeryIntroductionRachel Goldstein, MDWhat’s New in Imaging Stephanie Pun, MDWhat’s New in Biomarkers Jeffrey Nepple, MDWhat’s New in Biologics Jonathan Schoenecker, MD, PhD PAPER 90MRI Assessment of Inverted Labrum Following Closed Reduction of DDH After Femoral Head “Docking”Zhe Fu, MD; Jianping Yang, MD; Zhongli ZhangDepartment of Pediatric Orthopedics, Tianjin Hospital, Tianjin City, People’s Republic of China PAPER 91MRI 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 StudyFlorian Schmaranzer, MD; Mariana Ferrer, MD; Young Jo Kim, MD; Patricia Miller, MS; Jennifer Kallini; Pedro Justo, MD; Eduardo Novais, MDBoston Childrens Hospital, Boston MA PAPER 92Verication of Hip Reduction Using Medial Ultrasound in Spica Cast Treatment for Developmental Dysplasia of HipGang Fu, MDBeijing Jishuitan Hospital, Beijing, People’s Republic of China PAPER 93Investigating the Radiation Risk from Repeated Pelvic Imaging in Developmental Dysplasia of the HipAlexander 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 PAPER 94Comparative Evaluation of Perioperative Continuous Epidural Versus Continuous Lumbar Plexus Block for Complex Hip Surgeries in Children: A Retrospective ReviewMihir Thacker, MD; Dinesh K. Choudhry, MD; Karen Sacks; Bruce R. Brenn, MDAlfred I. duPont Hospital for Children, Wilmington, DE PAPER 95Single-Incision Triple Innominate Osteotomy: Outcomes of an Updated TechniqueWudbhav (Woody) Sankar, MD; Ira Zaltz, MDChildren’s Hospital of Philadelphia, Philadelphia, PA

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48SUBSPECIALTY DAY PROGRAM, CONTINUEDHIP SUBSPECIALTY DAY, CONTINUEDInfant Hip Imaging Introduction Travis Matheney, MDPotential Uses and Efcacy of In Clinic Ultrasound Pablo Casteñeda, MDAssessing Infant Hips After Operative Reduction Suzanne de Vos-Jakobs, MDHow Do We Assess Hip Perfusion After Infant Hip Reduction Travis Matheney, MDWhy Do We Bother to Assess Hip Perfusion? Don’t Most Cases Do Okay In the Long Run Vidyadhar Upasani, MD LOWER EXTREMITY SUBSPECIALTY DAY – 45 minutesCo-Chairs: Christopher 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. PAPER 96♦ Explanted PRECICE Magnetic Limb Lengthening Nails: Can They Be Reactivated?Hady Eltayeby, MBChB; Hamza Alrabai, MD; John Herzenberg, MDRubin Institute for Advanced Orthopedics, Sinai Hospital of Baltimore, Baltimore, MD PAPER 97Metallosis in PRECICE Nail Implants: An Endoscopic, Histologic, and Explanted Nail AnalysisKyle Miller, MD; Melih Eriten, PhD; Lejie Liu, PhD; Ahmet Deniz Usta, PhD; Shixuan Chen; Darya Buehler, MD; Ken Noonan, MD, FAAOSThe University of Wisconsin, Madison, WI PAPER 98Does 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, MDNational Taiwan University Hospital, Taipei, Taiwan PAPER 99Medial Metaphyseal Beak Angle as a Predictor for Langenskiold Stage II of Blount’s DiseaseJidapa Wongcharoenwatana, MD; Thanase Ariyawatkul, MDSiriraj Hospital, Mahidol University, Bangkok, Thailand ♦ Indicates those faculty presentations in which the FDA has not cleared the drug and/or medical device for the use described (ie. the drug or medical device is being discussed for an “off label” use).

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49SUBSPECIALTY DAY PROGRAM, CONTINUEDLOWER EXTREMITY SUBSPECIALTY DAY, CONTINUEDPAPER 100Depression 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, MDMonteore Medical Center/Albert Einstein College of Medicine, Bronx, NY PAPER 101Correction of Mild/Moderate Arthrogrypotic Knee Flexion Contractures with Guided GrowthHarold Van Bosse, MDShriners Hospital for Children, Philadelphia, PA Debate: Physeal Bar Excision: Is it Necessary?PRO: William Shaughnessey, MD, Mayo ClinicCON: John Birch, MD, FRCSC, Texas Scottish RiteCase Discussion: Surgical Approach for Tibial Deformity Osteotomy and PlatingMark Dahl, MD, Gillette Children’s HospitalOsteotomy and NailingChristopher Iobst, MD, Nationwide Children’s HospitalOsteotomy and External FixationSimon Kelley, MBChB, FRCS, Sick Kids, Toronto, ON Canada NEUROMUSCULAR SUBSPECIALTY DAY – 61 minutesCo-Chairs: Vineeta T. Swaroop, MD and Andrew Georgiadis, MDThis 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 proximal femoral sur-gery, a review of publications that may change your practice, discussion of patient reported outcomes, and pre-operative optimization of high-risk patients.PAPER 102♦ Long Term Outcomes of Ambulatory Function in Adults with Cerebral Palsy: Evaluating Change from AdolescenceMichael 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, MDNemours duPont Hospital for Children, Wilmington, DE ♦ Indicates those faculty presentations in which the FDA has not cleared the drug and/or medical device for the use described (ie. the drug or medical device is being discussed for an “off label” use).

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SUBSPECIALTY DAY PROGRAM, CONTINUEDNEUROMUSCULAR SUBSPECIALTY DAY, CONTINUEDPAPER 103Single Event Multilevel Surgery in Cerebral Palsy: Value Added by a Co-SurgeonNickolas Nahm, MD; Meryl Ludwig, MD; Freeman Miller, MD; Rachel Thompson, MD; Kenneth Rogers, PhD; Julieanne Sees, DONemours/AI duPont Hospital for Children, Wilmington, DE PAPER 104Remodeling of Femoral Head Deformity After Hip Reconstructive Surgery In Patients with Cerebral PalsyJae Jung Min, MD; Soonsun Kwon, PhD; Ki Hyuk Sung, MD; Kyoung Min Lee, MD; Chin Youb Chung, MD; Moon Seok Park, MDSeoul National University Bundang Hospital, Sungnam, Republic of Korea PAPER 105Clinical Outcomes of the Triple C Osteotomy for the Treatment of Pediatric Neuromuscular Foot Deformity: A Single Center, Retrospective StudyIan Hollyer; Derek Hesse, BS; Jill Larson, MDAnn & Robert H. Lurie Children’s Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL PAPER 106♦ Botulinum Toxin and Casting may Delay or Prevent Surgery in Spastic Hemiplegic Cerebral PalsyRobert Wimberly,MD; Anthony Riccio, MD; Stephen Gates, MD; Jonathan Van Pelt, BA; Mauricio Delgado, MDTexas Scottish Rite Hospital, Dallas, TX PAPER 107Survivorship of Gastrocnemius Soleus Fascial Lengthening (GSFL) for Equinus in Ambulatory Cerebral Palsy (CP): Factors Affecting Success in Long Term Follow-upKristen Carroll, MD; Emma Naatz; Alan Stotts, MD; Bruce MacWilliams; Sierra Pond, BSShriners Hospital for Children- Salt Lake City, Salt Lake City, UT Debate: Spastic Hip Subluxation (in GMFCS IV and V): Unilateral vs Bilateral VDRO? Unilateral – Lori Karol, MDBilateral – Robert Kay, MDRemoval of Proximal Femoral Implants - Should This Be Routine and How to Manage Peri-implant FractureWalter Truong, MDPublications This Year that Might Change your PracticePooya Hosseinzadeh, MDHow and Which Patient Reported Outcomes to Collect in Neuromuscular PatientsUnni Narayanan, MSc, MBBS, FAAOS, FRCSCPre-operative Optimization for Neuromuscular Surgical PatientsWade Shrader, MD ♦ Indicates those faculty presentations in which the FDA has not cleared the drug and/or medical device for the use described (ie. the drug or medical device is being discussed for an “off label” use).50

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51SUBSPECIALTY DAY PROGRAM, CONTINUEDSPINE SUBSPECIALTY DAY – 114 minutesCo-Chairs: Ron El-Hawary, MD and Sumeet Garg, MDDo 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.PAPER 108Safety of Pedicle Screw Placement in a Large Series of AIS Patients: Is Navigation Necessary?Daniel Sucato,MD, MS; Kiley Poppino, BSTexas Scottish Rite Hospital for Children, Dallas, TX PAPER 109Does Navigation Make Spinal Fusion for Adolescent Idiopathic Scoliosis Safer? Insights from 17,400 Cases in a National DatabaseJapsimran Kaur, BS; Jayme Koltsov, PhD; Ivan Cheng; John Vorhies, MDStanford, Stanford, CA PAPER 110Power Pedicle Tract Preparation and Screw Placement: A Multicenter Study of Early AdoptersEdward 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, MMMChildren’s Hospital Los Angeles, Los Angeles, CA PAPER 111Bracing Decreases Back Pain in Adolescents with Idiopathic ScoliosisLori Dolan, PhD; Kelsey Sheets; Stuart Weinstein, MDUniversity of Iowa, Iowa City, IA PAPER 112Pregnancy Outcomes in Operative vs. Nonoperative Scoliosis Patients at Mean 30-Year Follow-UpA. Noelle Larson, MD; Lauren Swany; Pawel Grabala, MD; Suken Shah, MD; Todd Milbrandt, MD; Michael YaszemskiMayo Clinic, Rochester, MN PAPER 113Surgeon Volume Affects Short- and Long-term Surgical Outcomes in Idiopathic ScoliosisAlexander Satin, MD; Vishal Sarwahi, MD; Aaron Atlas, MS; Sayyida Hasan, BS; Jesse Galina, BS; Dean Perfetti, MD; Terry Amaral, MDCohen Children’s Medical Center, Queens, NY Challenging the Dogma of Idiopathic ScoliosisNatural History of 35-50 Degree Curves in Idiopathic ScoliosisStefan Parent, MD, PhDPredicting Brace Success versus Failure in Idiopathic ScoliosisRon El-Hawary, MD, FRCSC

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SUBSPECIALTY DAY PROGRAM, CONTINUEDSPINE SUBSPECIALTY DAY, CONTINUEDRadiographic vs Biologic Markers for Growth Prediction in Idiopathic ScoliosisMichelle Welborn, MDVertebral Body Tethering -- How to and Early ResultsKevin Smit, MDPosterior Dynamic Deformity Correction – How to and Early ResultsJeffrey Sawyer, MD PAPER 114Using 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, PhDNemours, Jacksonville, FL PAPER 115♦ 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, MDCHU Sainte-Justine, Montreal, Quebec, Canada PAPER 116Vertebral Body Tethering: Truly Motion Preserving or Rather Motion Limiting?Firoz Miyanji, FRCSC; Paul Rushton, MBBS; Maty Petcharaporn, BS; Michelle Marks, PTBritish Columbia Children’s Hospital, Vancouver, BC, Canada PAPER 117T1 Tilt and Clavicle Angle are the Best Predictors of Postoperative Shoulder Balance in AIS Patients: A Review of 347 CasesVishal Sarwahi, MD; Aaron Atlas, MS; Jesse Galina, BS; Sayyida Hasan, BS; Yungtai Lo, PhD; Spencer Stein, MD; Terry Amaral, MDCohen Children’s Medical Center, Queens, NY PAPER 118Bigger is Better: Larger Thoracic Height is Associated with Increased Health Related Quality of Life at Skeletal MaturityMatthew 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 GroupColumbia University Medical Center, New York, NY PAPER 119Single Rod Constructs in Severe EOS Produce Similar Cobb Correction and Spinal Growth as Dual MCGR ConstructsScott Luhmann, MD; David Skaggs, MD, MMM; Charles Johnston, MD; Joshua Pahys; John Smith, MD; Amer Samdani, MD; Ron El-Hawary, MD; Pediatric Spine Study GroupWashington University School of Medicine, Saint Louis, MO ♦ Indicates those faculty presentations in which the FDA has not cleared the drug and/or medical device for the use described (ie. the drug or medical device is being discussed for an “off label” use).52

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SUBSPECIALTY DAY PROGRAM, CONTINUEDSPINE SUBSPECIALTY DAY, CONTINUEDPediatric Scoliosis DebatesNavigation Improves Quality and Safety: PointJason Anari, MDNavigation Improves Quality and Safety: CounterpointJennifer Bauer, MD, MSNavigation Improves Teaching: PointA. Noelle Larson, MDNavigation Improves Teaching: CounterpointDominick Tuason, MDBracing is as Effective as Casting for EOS: PointJohn Thometz , MDBracing is as Effective as Casting for EOS: Counterpoint Graham Fedorak, MD SPORTS SUBSPECIALTY DAY – 102 minutesCo-Chairs: Cordelia Carter MD and Peter Fabricant MD, MPHThis 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. PAPER 120Athlete Burnout Is Associated with Perceived Likelihood of Future Injury Among Healthy Adolescent AthletesAaron Provance, MD; Morgan Potter, BA; Gregory Walker, MD; Katherine Dahab, MD; David Howell, ATCUniversity of Colorado Department of Orthopedics, Aurora, CO PAPER 121Pediatric Shoulder Instability and Arthroscopic Shoulder Instability Surgery Across the United States: A PHIS Database StudyRyan Coene; Kelly McFarlane, BS; Kathryn Williams, MS; Lanna Feldman, MS; Matthew Milewski, MDBoston Children’s Hospital, Boston, MA PAPER 122Arthroscopic Shoulder Stabilization in High School Football Players: Recurrent Instability with Return to Contact SportJessica Stambaugh, MD; Eric Edmonds, MD; Andrew Pennock, MDRady Children’s Hospital, San Diego, San Diego, CA 53

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54SUBSPECIALTY DAY PROGRAM, CONTINUEDSPORTS SUBSPECIALTY DAY, CONTINUEDPAPER 123Pediatric Meniscus Ramp Lesions: Incidence, Risk Factors, and Magnetic Resonance Imaging (MRI) SensitivityMargaret Wright, MD; Joshua Bram, BS; Jie Nguyen, MD; Tomasina Leska, BS; Julien Aoyama, BA; Theodore Ganley, MDChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 124Open Osteochondral Autograft Transfer Results in More Frequent Reoperation than Open Allograft Transfer in the Pediatric KneeTyler Hall, BA; Max Hyman; Neeraj Patel, MDAnn & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL PAPER 125Increased Tibiofemoral Rotation with Increasing Severity of Pediatric Patellar InstabilityDaniel Green, MD; Kenneth Lin, MD; Evan James, MD; Alexandra Aitchison, BS; Lindsay Schlichte, MS; Grace Wang, BAHospital for Special Surgery, New York, NY Instructional Course Lecture: Pediatric Revision ACLWhat Do We Know About Revision ACLs in Kids? Andrew Pennock, MD Preoperative Evaluation: From Diagnostic Imaging to Biomechanical AssessmentJohn Todd Lawrence, MD, PhDPsychological Assessment and Cognitive Skills Training: Practical Applications for You and Your Patients Melissa Christino, MDMy Approach to Tunnel Management in Revision ACL ReconstructionEric Edmonds, MDOperative Decision-making: Graft Choice and the Role for Associated Stabilization Procedures Philip Wilson, MD PAPER 126Discoid Meniscus Repairs in Children and Adolescents: Minimum 2 Year OutcomesCrystal Perkins, MD; Michael Busch, MD; Samuel Willimon, MDChildren’s Healthcare of Atlanta, Atlanta, GA PAPER 127Long Term Follow Up After Discoid Lateral Meniscus Preservation SurgeryMininder Kocher, MD, MPH; Laura Lins, MPH; Brian Yang, MD; Kathryn Williams, MS; Saritha SankarankuttyBoston Children’s Hospital, Boston, MA

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55SUBSPECIALTY DAY PROGRAM, CONTINUEDSPORTS SUBSPECIALTY DAY, CONTINUEDPAPER 128Does 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, DOSeattle Children’s Hospital, Seattle, WA PAPER 129Concomitant Meniscectomy Results in Delayed Return To Sport Compared to Meniscus Repair in Primary Pediatric ACL ReconstructionBrendan Williams, MD; Margaret Wright, MD; Joshua Bram, BS; Neeraj Patel, MD; Theodore Ganley, MDChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 130Quadricep Strength in Adolescent Patients Undergoing Anterior Cruciate Ligament Reconstruction After a Femoral Nerve Versus Adductor Canal BlockPaul Fleissner, MDCrystal Clinic Orthopaedic Center, Akron, OH PAPER 131Comparison of 6-Month Return to Sports Testing Following ACL Reconstruction in Adolescents with Quadriceps Tendon Autograft versus Hamstring AutograftElizabeth Liotta; Dai Sugimoto; Kathleen Maguire, MD; Mininder Kocher, MD, MPH; Lyle Micheli, MD; Benton Heyworth, MDBoston Children’s Hospital, Boston, MA Masters 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. Nonoperative Treatment (with an Emphasis on ‘Treatment’)… The Keys to Maximizing Success of Rehabilitation, Bracing, and Return to Play in First Time DislocatorsJoseph T. Molony Jr, PT, MA, SCS, CSCSTreating Our Youngest Patients: How Studying Pediatric Knee Anatomy Has Changed My Approach to Patellofemoral Instability In Children Under 10 Years OldKevin Shea MDManagement of Coronal and Axial Bony Deformity: When and How to TreatCorinna Franklin MDManaging Chondral Injuries In the Setting of Patellofemoral InstabilityAristides Cruz MDAn Algorithmic Approach To Treating Our Most Challenging Patients: Syndromic Patellar Instability and Instability in FlexionDaniel Green MD

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56SUBSPECIALTY DAY PROGRAM, CONTINUEDTRAUMA SUBSPECIALTY DAY – 118 minutesCo-Chairs: Mauricio Silva, MD and Mark Sinclair, MDThe Trauma Subspecialty session will consist of three different components, all of which should be of interest to pediatric orthopaedic 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 controversies in trauma care. There will also be two didactic sessions. The rst will discuss turning 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 complica-tions into improvement opportunities will be stressed.The second will discuss variations of common fracture care, highlighting 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?PAPER 132Lowering the Default Dose Quantity Decreases the Number of Opioids Prescribed in the Pediatric EDWee-Jhong Chua, MD; Cornelius Groenewald, MBChB; Shing Varakitsomboon, BS; Jacob Harris, BS; Anna Faino, MS; Linda Quan, MD; Gary Walco, PhD; Ted Sousa, MDSeattle Children’s Hospital, Seattle, WA PAPER 133Demographic Changes in US Trampoline Related Injuries 1998 through 2017: Cause for AlarmRyan Fitzgerald, MD; Serena Freiman, BS; Robert Kulwin, MD; Randall Loder, MDRiley Children’s Hospital, Indianapolis, IN PAPER 134Predictive Factors of Reconstructive Surgery for Chronic Monteggia Fracture in ChildrenKyung Rae Ko, MD; Jong Sup Shim, MD; Minkyu Seo, MDSamsung Medical Center, Seoul, Republic of Korea PAPER 135Randomized Clinical Trial Comparing Intramedullary Kirschner-Wires to Titanium Elastic Nails for Pediatric Femur Fractures in Dar es Salaam, Tanzania: A Preliminary AnalysisEdmund Eliezer, MD; Msami Evarist, MD; Bryson Mcharo, MD; Revocatus Bernard, MD; John Ibrahim, MD; David Shearer, MD; Saam Morshed, MD; Patrick Curran, MDMuhimbili Orthopaedic Institute, Dar es Salaam, Tanzania PAPER 136Flexible 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, MDTexas Children’s Hospital, Houston, TX may be used for external trauma-related CMEs.

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57SUBSPECIALTY DAY PROGRAM, CONTINUEDmay be used for external trauma-related CMEs.TRAUMA SUBSPECIALTY DAY, CONTINUEDPAPER 137“Length Unstable” Pediatric Femoral Shaft Fractures Treated with Flexible Elastic Nails Have Few ComplicationsPhilip 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, MDUniversity of South Florida, Tampa, FL Session 1: Turning Punitive M&M Conference into Trauma Quality Improvement Conference: It’s Easy If You Know HowThe Orthopaedic Surgeon’s Guide to Quality ImprovementCaroline Tougas, MDThe “One-Off” Complication: Case PresentationCaroline Tougas, MDTracking and Trending the One-Off Complication To Ensure It Doesn’t Happen Again John Kemppainen, MDThe Provider-Caused Complication: Case Presentation Caroline Tougas, MDRogue Agent or Flawed Policy/Procedure: Appropriate Management of the Provider-Caused Complication Brad Olney, MDThe Systems Issue Complication: Case Presentation Caroline Tougas, MDHow to Solve a Complication That Wasn’t Your Fault: Bringing the Systems Related Complication Around to Full Loop Closure Stephanie Holmes, MD PAPER 138Spica Casting Results in More Unplanned Reoperations than Elastic Intramedullary Nailing: A National Analysis of Femur Fractures in the Preschool PopulationDavid Lyons, DO; Konstantin Brnjoš, BS; Max Hyman; Neeraj Patel, MDAnn & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL PAPER 139Early Failure of Proximal Femoral Locking Compression Plates in Pediatric Proximal Femur FracturesBenjamin Sheffer, MD; Derek Kelly, MD; Seth Cope, MD; Matthew Wideman; James Beaty, MD; William Warner, MD; David Spence, MD; Jeffrey Sawyer, MDCampbell Clinic Orthopaedics, Memphis, TN PAPER 140Functional Outcomes of Tillaux and Triplane Fractures with 2-5mm of Intra-Articular GapVidyadhar Upasani, MD; Benjamin Lurie, BA; Noelle Van Rysselberghe, BA; Andrew Pennock, MDRady Children’s Hospital, San Diego, San Diego, CA

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58SUBSPECIALTY DAY PROGRAM, CONTINUEDTRAUMA SUBSPECIALTY DAY, CONTINUEDPAPER 141Titanium Elastic Nails System (TENS) in Adolescent Forearm Fractures : Using Bone Age as an Objective Guide to Its LimitsChin Chuen Tan; Kenneth Wong, FRCS; John Allen, PhD; Arjandas Mahadev, FRCSKK Women’s and Children’s Hospital, Singapore, Singapore PAPER 142Outcomes of Displaced Lateral Condyle Humerus Fractures Treated with Closed Versus Open ReductionAdam Thiessen, MD; Marilyn Elliott; Shawn Funk, MD; Brandon Ramo, MDTexas Scottish Rite Hospital, Dallas, TX PAPER 143Treatment of Forearm Fractures in Children: Is Single Bone Fixation Adequate?Tsung-yu Lan, MDFar-eastern Memorial Hospital, Department of Orthopedic Surgery, New Taipei City, Taiwan Session 2: Variations in Common Fracture Care: Benign Practice Variability or Failure of Trauma Practice Protocols?Closed Management Without Fixation Katherine Schroeder, MDOperative Management with Fixation Kristin Livingston, MDForearm Fracture: Closed Management Without Fixation Shawn “Skip” Gilbert, MDForearm Fracture: Operative Management with Fixation Patrick Bosch, MDDistal Tibial Physeal Fracture: Closed Management Without Fixation Matt Ellington, MDDistal Tibial Physeal Fracture: Operative Management with Fixation Scott Yang, MD may be used for external trauma-related CMEs.

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59UPPER/LOWER EXTREMITY – 36 minutesPAPER 144What 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, MDTexas Scottish Rite Hospital for Children, Dallas, TX PAPER 145Functional Outcomes of Tendon Transfer for Brachial Plexus Birth Palsy Using the Hoffer TechniqueNina Lightdale-Miric, MD; Ram Alluri, MD; Erin Meisel, MD; Gina Kim, MA; Jesse Kaplan, MD; Soa Bougioukli, MD; Milan Stevanovic, MDChildren’s Hospital Los Angeles (CHLA), Los Angeles, CA PAPER 146Sprengel’s Deformity: An Analysis of Surgically and Non-surgically Treated PatientsCarley Vuillermin, MBBS; Kemble Wang, MD; Kathryn Williams, MS; Michael Hresko, MD; Peter Waters, MDBoston Children’s Hospital, Boston, MA PAPER 147Comparison 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 FormulaeJohn Birch, FRCSC; Marina Makarov; David Podeszwa, MD; James Sanders, MD; Chan-Hee Jo, PhDTexas Scottish Rite Hospital for Children, Dallas, TX PAPER 148Dual Plate Epiphysiodesis for Limb Length Inequality: Followed to MaturityPeter Stevens, MD; Matias Desperes, MD; Philip McClure, MD; Angela Presson, PhD; Jennifer Herrick, BAUniversity of Utah, Salt Lake City, UT PAPER 149Monitoring with Tantalum Beads Demonstrates No Clinically Signicant Growth Following Percutaneous Transphyseal Screw EpiphysiodesisSreetha Sidharthan; Clare Kehoe; Grace Wang, BA; Roger Widmann, MD; John Blanco; Emily Dodwell, MDHospital for Special Surgery, New York, NY PAPER 150Growth Modulation for Fixed Flexion Contracture of the Knee: A Comparison of Two TechniquesPhilip McClure, MD; Hamza Alrabai, MD; Martin Gesheff, BS; Shawn Standard, MD; John Herzenberg, MDRubin Institute for Advanced Orthopedics, Sinai Hospital of Baltimore, Baltimore, MD PAPER 151Successful 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, MDTexas Scottish Rite Hospital for Children, Dallas, TX PRESENTATIONS, CONTINUED

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UPPER/LOWER EXTREMITY, CONTINUEDPAPER 152There Is No Benet to Hip Dysplasia Screening in Children with Idiopathic ClubfootDell McLaughlin, MD; Ruth Gremminger, MD; Marwah Sadat; Maryse Bouchard, MDThe Hospital for Sick Children, Toronto, Ontario, Canada NEUROMUSCULAR – 24 minutesPAPER 153Predicted Life Expectancy in Patients with Cerebral Palsy and Neuromuscular Scoliosis Undergoing Spinal Fusion: An Exploratory Analysis from a Single Institution Over 15 YearsArun 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, DONemours/A.I. duPont, Wilmington, DE PAPER 154In Search of a Warning Signal: Predicting Rapid Curve Progression in Neuromuscular ScoliosisJoshua Bram, BS; Alexa Karkenny, MD; Ronit Shah; Divya Talwar, MPH; Keith Baldwin, MD; John (Jack) Flynn, MDChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 155Classications of Motor Level in Myelomeningocele: Are they Indicative of Ambulatory Function?Melissa Bent MD; Susan Rethlefsen PT; Nicole Mueske; Tishya Wren PhDChildren’s Hospital Los Angeles, Los Angeles, CA PAPER 156Impact of Hip Surveillance on Surgical Practice: What Makes a Difference?Stacey Miller, PT; Maureen O’Donnell, MD; Kishore Mulpuri, MBBS, MSBC Children’s Hospital, Vancouver, BC, Canada PAPER 157Nusinersin Does Not Mitigate Hip and Spine Pathoanatomy in Spinal Muscular Atrophy PatientsMichael Troy, BS; Patricia Miller, MS; Basil Darras, MD; Brian Snyder, MD, PhDBoston Children’s Hospital, Boston, MA PAPER 158Gait Disturbances Following ‘Perc” Hamstring Lengthenings for Treatment of Cerebral PalsyAllison Scott, MD; Judith Linton, PT; Christina Bickley, BOCOShriners Hospital for Children, Houston, Houston, TX PRESENTATIONS, CONTINUED60

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HIP – 48 minutesPAPER 159Even “Experts” Can Be Fooled: The Reliability of Clinical Examination in Diagnosing Developmental Hip Dislocations in NewbornsAlexander 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, MSBC Children’s Hospital, Vancouver, BC, Canada PAPER 160Hip Click Is Not Signicantly Associated with DDH Prevalence Among Infant Hips Referred for Evaluation of DDHMargaret 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, MDChildren’s Hospital Colorado, Aurora, CO PAPER 161Ultrasonographically 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 TreatmentLuis Moraleda, MD; Joaquin Nuñez de Armas, MD; Mar Perez Martin-Buitrago, PhD; Maria Salcedo, MD; Gaspar Gonzalez-Moran, MDHospital Universitario La Paz, Madrid, Spain PAPER 162AI-Augmented 2D Cine Ultrasound Improves the Reliability and Accuracy of Hip Dysplasia DiagnosisSukhdeep Dulai, FRCSC; Siyavash Nia, MSc; Abhilash Rakkunedeth, PhD; Jacob L. Jaremko, MEdUniversity of Alberta, Edmonton, Alberta, Canada PAPER 163Updated Normal Values of the Pediatric Hip Joint: A Retrospective Cohort StudyDerek Hesse, BS; Ian Hollyer; Jamie Burgess, PhD; Joseph Janicki, MDAnn & Robert H. Lurie Children’s Hospital, Chicago, IL PAPER 164Part-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, MDChildren’s Hospital of Philadelphia, Philadelphia, PA PAPER 165Inverted Acetabular Labrum is Predictive of Pavlik Harness Treatment Failure for Children with Developmental Hip DysplasiaAli Siddiqui, BS; Lillian Lai, MD; Rachel Goldstein, MDChildren’s Hospital Los Angeles, Los Angeles, CA PRESENTATIONS, CONTINUED61

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HIP, CONTINUEDPAPER 166Hip Dysplasia at 4 Years in Patients with Perinatal Risk Factors for DDHSimon Humphry, FRCS (Ortho); Tim Hall, MBBS; Margaret Hall-Craggs, MD; Andreas Roposch, MDGreat Ormond Street Hospital, London, United Kingdom PAPER 167Long Term Outcomes Following Successful Closed or Open Reduction of Late Detected Developmental Dysplasia of the HipWilliam Morris, MD; Sean Hinds, BS; Hannah Worrall, MPH; Chan-Hee Jo, PhD; Harry Kim, MDTexas Scottish Rite Hospital for Children, Dallas, TX PAPER 168Intermediate Outcomes following Surgical Hip Dislocation Approach for the Treatment of Hip Deformity in Healed Legg-Calve-Perthes DiseaseEduardo Novais, MD; Pedro Justo, MD; Young Jo Kim, MD; Michael Millis, MD; Whitney Hovater; Daniel Maranho, MD; Mariana Ferrer, MD; Patricia Miller, MS; Roya DastjerdiBoston Childrens Hospital, Boston MA PAPER 169Reoperations Following Periacetabular Osteotomy Secondary to ImpingementJeffrey Lamping, MD; Erika Daley, MD; Ira Zaltz, MDBeaumont Health, Royal Oak, MI PAPER 170Surgical Treatment of Femoroacetabular Impingement: Arthroscopy vs. Surgical Hip Dislocation – A Propensity Matched AnalysisIra Zaltz, MD; Asheesh Bedi; Jeffrey Nepple, MD; Paul Beaule, MD; Michael Millis, MD; Rafael Sierra, MD; Ernest Sink, MD; ANCHOR Study Group; John Clohisy, MDWashington University School of Medicine, Saint Louis, MO PRESENTATIONS, CONTINUED62

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ePOSTERSePoster 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, 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 ePOSTERS64

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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; Scott Hetzel, MS; Rewais Hanna, BSUniversity 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 ePoster 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 ePOSTERS, CONTINUED65

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66ePoster 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 ePOSTERS, CONTINUED

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67ePoster 25♦ Pediatric 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 ePoster 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 ePOSTERS, CONTINUED♦ Indicates those faculty presentations in which the FDA has not cleared the drug and/or medical device for the use described (ie. the drug or medical device is being discussed for an “off label” use).

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68ePoster 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 OsteoarticularInfectionsNicholas 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 ePOSTERS, CONTINUED

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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 ePoster 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 Lopez, 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; Thomas 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 ePOSTERS, CONTINUED69

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70ePoster 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 AssessmentTanyawat 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 ePOSTERS, CONTINUED

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71ePoster 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; Elizabeth Terhune, MS; Cambria Wethey, BS; Justin Casey, MS; Brittan 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 ePOSTERS, CONTINUED

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72ePoster 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 Vitale, MDColumbia 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 ePoster 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 ePOSTERS, CONTINUED

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73ePoster 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 ePOSTERS, CONTINUED

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74ePoster 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 ePoster 81Structural Effects of Periosteal Resection on BoneMatthew Halanski, MDUniversity of Wisconsin, Madison, WI ePoster 82Are 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 ePoster 83Serum-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 ePoster 84Using 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 ePOSTERS, CONTINUED

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75ePoster 85Chiari 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 ePoster 86Patient 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 ePoster 87The 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 ePoster 88Introduction 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 ePoster 89Talar-Tarsal Stabilization: Rationale and Preliminary OutcomesPeter Stevens, MD; Alex Lancaster, MD; Ansab Khwaja, MDUniversity of Utah, Salt Lake City, UT ePoster 90Pediatric and Adolescent Lisfranc Injuries – Management and OutcomesIndranil Kushare, MD; Nicole Wunderlich, PA-C; Ahmed Elabd, MD; Elsayed Attia, MDTexas Children’s Hospital, Houston, TX ePoster 91Clinical 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 ePoster 92Paediatric 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 ePOSTERS, CONTINUED

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76ePoster 93The Effect of Social Deprivation on Pediatric PROMIS Scores in Children with Brachial Plexus Birth InjuryMary Claire Manske, MD; Michelle James, MDShriners Hospital for Children Northern California, Sacramento, CA ePoster 94De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 ePoster 95Effect 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 ePoster 96Comparison 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 ePoster 97Prognostic Factors for Joint Deformity Following Pediatric Septic ArthritisRyosuke Yamaguchi, MD; Tomoyuki Nakamura, MD; Kazuyuki Takamura, MD; Yasuharu Nakashima, MDKyushu University, Fukuoka, Japan ePoster 98Predicting 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 ePoster 99Pediatric 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 ePoster 100Fassier 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 ePOSTERS, CONTINUED

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77ePoster 101Guided 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 ePoster 102Extramedullary 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 ePoster 103Presence 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 ePoster 104Orthopaedic 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 ePoster 105Progression of Hip Instability in Children with Spinal Muscular AtrophySayan De, MD; Alexis Gerk, BS; Cosmo Kwok, MD; Wade Coomer, BS; Joyce Oleszek, MDChildren’s Hospital Colorado, Aurora, CO ePoster 106Does 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 ePoster 107The 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 ePoster 108Determinants 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 ePOSTERS, CONTINUED

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78ePoster 109Addressing 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 ePoster 110Implementation 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 ePoster 111The 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 ePoster 112Microbiology 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 ePoster 113Intraoperative 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 ePoster 114Outcomes 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 ePoster 115Not 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 ePoster 116Opioid 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 ePOSTERS, CONTINUED

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79ePoster 117Cast 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 ePoster 118Where 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 ePoster 1193-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 ePoster 120Neurological 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 ePoster 1212016 POSNA Clinical Research Grant JUPITER (Justify Patellar Instability Treatment by Early ResultsShital N. Parikh, MD ePoster 1222016 POSNA Directed Research Grant Comprehensive Coagulation Prole (including Thromboelastinograph) in Patients Receiving Tranexamic AcidPatrick Bosch, MD ePoster 1232017 Kuo Award Research Grant A Bioinspired Approach to Large Pediatric Osteochandral InjuriesPatrick Whitlock, MD ePoster 1242017 POSNA/NuVasive Spine Research Grant Recovery of Alveolar Size & Number Following Spinal Fusion for Adolescent Idiopathic ScoliosisPeter Sturm, MD ePOSTERS, CONTINUED

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80ePOSTERS, CONTINUEDePoster 1252017 POSNA Clinical Research Grant Measuring Priorities & Goals of Children with Duchenne Muscular Dystrophy to Develop a Meaningful Patient Reported Outcome MeasureUnni Narayanan, MD ePoster 1262018 POSNA Clinical Trials Research Grant Hip Surveillance in Children with CP: Developing POSNA Wide CWade Schrader, MD ePoster 1272018 POSNA Start Up Research Grant Utilization of Laser Doppler Flowmetry for Dynamic Assessment of Femoral Head Perfusion to Pre-dict the Osteonecrosis Rate Following Modied Dunn ProcedureCourtney Selberg, MD ePoster 1282018 POSNA Start Up Research Grant Evaluating the Role of Patellar Realignment in Patients with CP Joshua Hyman, MD

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81Video 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 ABSTRACTS

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82VIDEO ABSTRACTS, CONTINUEDVideo Abstract 10 Open 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 11 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 12 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 13Anterior Approach and Capital Realignment for Severe Slips Sandeep Patwardhan, MS; Ashok Shyam, MS Sancheti Institute for Orthopaedics and Rehabilitation, Pune Maharashtra, India Video Abstract 14 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 Video Abstract 15 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 16Osteochondral Allograft with Open Surgical Hip Dislocation William T. Baumgartner, MD; Brian Michael Haus, MD; Trevor J. Shelton, MD University of California, Davis, Sacramento, CA Video Abstract 17Armboard 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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83POSNA ANTITRUST POLICYIt shall be the policy of the Pediatric Orthopaedic Society of North America (POSNA) to be in strict compliance with all Federal and State Antitrust laws, rules and regulations. Therefore: These policies and procedures apply to all membership, board, committee, and all meetings attended by representa-tives of the POSNA.Discussions at POSNA meetings often cover a broad range of topics pertinent to the interests or concerns of orthopaedic surgeons. As a general rule, except as noted below, discussions at POSNA meetings can address topics without raising antitrust concerns if the discussions are kept scrupulously free of even the suggestion of private regulation of the profession. However, a number of topics that might be (and have been) discussed at POSNA meetings may raise signicant complex antitrust con-cerns. These include:• Membership admissions, rejections, restrictions, and terminations;• Method of provision and sale of POSNA products and services to non-members;• Restrictions in the selection and requirements for exhibitors at the POSNA Annual Meeting or in CME activities; • Collecting and distributing certain orthopaedic practice information, particularly involving practice charges and costs; • Obtaining and distributing orthopaedic industry price and cost information;• Professional certication programs; • Group buying and selling; and• Inclusions or exclusion of other medical societies in organizational activities or offerings. When these and related topics are discussed, the convener or members of the POSNA group should seek counsel from its General Counsel. POSNA urges its Board, committees and other groups not to participate in discussions that may give the appearance of or constitute an agreement that would violate the antitrust laws. Notwithstandingthis reliance, it is the responsibility of each POSNA Board or committee member to avoid raising improper subjects for discussion. This policy has been prepared to ensure that POSNA members and other participants in POSNA meetings are aware of this obligation.The “Do Not’s” and “Do’s” presented below highlight only the most basic antitrust principles. POSNA members and others participating in POSNA meetings should consult with the General Counsel in all cases involving specic questions, interpretations or advice regarding antitrust matters. Do Not’s1. Do not, in fact or appearance, discuss or exchange information regarding: a. Individual company prices, price changes, price differentials, mark-ups, discounts, allowances, credit terms, etc. or any other data that may bear on price, such as costs, production, capacity, inventories, sales, etc. b. Raising, lowering or “stabilizing” orthopaedic prices or fees; c. What constitutes a fair prot or margin level; d. The availability of products or services; or e. The allocation of markets, territories or patients.2. Do not suggest or imply that POSNA members should or should not deal with certain other persons or companies.3. Do not foster unfair practices regarding advertising, standardization, certication or accreditation.4. Do not discuss or exchange information regarding the above matters during social gatherings, incidental to POSNA-sponsored meetings.POSNA ANTITRUST POLICY

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5. Do not make oral or written statements on important issues on behalf of POSNA without appropriate authority to do so. The Do’s1. Do adhere to prepared agenda for all POSNA meetings. It is generally permissible for agendas to include discussions of such varied topics as professional economic trends, advances and problems in relevant technology or research, various aspects of the science and art of management, and relationships with local, state or federal governments. 2. Do object whenever meeting summaries do not accurately reect the matters that occurred. 3. Do consult with General Counsel on all antitrust questions relating to discussions at POSNA meetings.4. Do object to and do not participate in any discussions or meeting activities that you believe violate the antitrust laws; dissociate yourself from any such discussions or activities and leave any meeting in which they continue. Special Guidelines for Collecting and Distributing Information The collection and distribution of information regarding business practices is a traditional function of associations and is well-recognized under the law as appropriate, legal and consistent with the antitrust laws. However, if conducted improperly, such information gathering and distributing activities might be viewed as facilitating an express or implied agreement among association members to adhere to the same business practices. For this reason, special general guidelines have developed over time regarding association’s reporting on information collected from and disseminated to members. Any exceptions to these general guidelines should be made only after discussion with General Counsel. These general guidelines include:1. Member participation in a statistical reporting program is voluntary. A statistical reporting program should be conducted without coercion or penalty. Non-members should be allowed to participate in a statistical reporting program if eligible; however, if a fee is involved, non-members may be charged a reasonably higher fee than members. 2. Information should be collected via a written instrument that clearly sets forth what is being requested.3. The data that is collected should be about past transactions or activities; particularly if the survey deals with prices and price terms (including charges, costs, wages, benets, discounts, etc.), it should be historic, i.e., more than three months old.4. The data should be collected by either POSNA or an independent third party not connected with any one member.5. Data on individual orthopaedic surgeons should be kept condential.6. There should be a sufcient number of participants to prevent specic responses or data from being attributable to any one respondent. As a general rule, there should be at least ve respondents reporting data upon which any statistic or item is based, and no individual’s data should represent more than 25% on a weighted average of that statistic or item. 7. Composite/aggregate data should be available to all participants – both members and non-members. The data may be categorized, e.g., geographically, and ranges and averages may be used. No member should be given access to the raw data. Disclosure of individual data could serve to promote uniformity and reduce competition.8. As a general rule, there should be no discussion or agreement as to how members and non-members should adjust, plan or carry out their practices based on the results of the survey. Each member should analyze the data and make business decisions independently. POSNA ANTITRUST POLICY, CONTINUED84

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852020 POSNA RESEARCH GRANT WINNERS2020 KUO MEMORIAL RESEARCH AWARDApurva Shah, MD“Opioid vs. Non-opioid Analgesia in Pediatric Supracondylar Humerus Fractures”The Children’s Hospital of Philadelphia2020 HUENE MEMORIAL RESEARCH AWARDTheodore Ganley, MD“Tibial Spine Fractures Prospective Cohort Study”The Children’s Hospital of Philadelphia 2020 ST. GILES YOUNG INVESTIGATOR RESEARCH AWARDNeeraj Patel, MD“Anterolateral Ligament Reconstruction in Children: A Randomized, Controlled Trial”Lurie Children’s Hospital2020 POSNA/ZIMMER BIOMET SPINE RESEARCH GRANTJohn Vorhies, MD“Erector Spinae Plane Catheters and Clinical Outcomes after Spinal Fusion”Stanford University2020 CLINICAL TRIAL PLANNING RESEARCH GRANTFiroz Miyanji, MD“Effect of Mix-Metal Instrumentation on Blood Metal Ion Levels in Scoliosis”University of British Columbia2020 POSNA DIRECTED RESEARCH GRANTSPeter Newton, MD“Post-Op Flexibility & Segmental Motion in Idiopathic Scoliosis – Anterior Spinal Growth Tethering vs. Posterior Spinal Fusion”Rady Children’s HospitalMichael Vitale, MD“Evaluation of Sagittal and Axial Parameters in Braced Adolescent Idiopathic Scoliosis Patient”Columbia University Medical Center2020 POSNA REGISTRY GRANTAndrea Bauer, MD“GUPI: Growing Up with a Plexus Injury”Boston Children’s Hospital2020 AWARD WINNERS

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2020 POSNA RESEARCH GRANTS - BASIC RESEARCHJason Howard, MD“Muscle Stiffness in Cerebral Palsy: The Effect of Botulinum Toxin”Nemours/Alfred I duPont Hospital for ChildrenYinshi Ren, PhD; Harry Kim, MD, CoPI“Determining the Effect of Obesity on Necrotic Bone Healing in Legg-Calvé-Perthes Disease”Texas Scottish Rite Hospital for ChildrenJennifer Laine, MD“Development of a Minimally Invasive Model of Legg-Calvé-Perthes Disease”Gillette Children’s Specialty Healthcare2020 POSNA RESEARCH GRANT – CLINICAL RESEARCHKristen Tulchin-Francis, PhD“Outcomes of Amputation or Limb Reconstruction in Severe Fibular Deciency”Texas Scottish Rite Hospital for Children2020 POSNA START UP RESEARCH GRANTSStefan Parent, MD“Lung Development & Congenital Spine Deformities: An In-vivo Ovine Model”CHU Sainte-Justine, MontrealHaluk Altiok, MD“The Effect of Knee Height Asymmetry on Gait Biomechanics”Shriners Hospital for Children, ChicagoDec 01 – 05, 2020 • Orlando, FLInternational Pediatric Orthopaedic SymposiumIPOS17th AnnualTodd Milbrandt, MD Course Director2020 AWARD WINNERS, CONTINUED86

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1 Tower Lane, Suite 2410Oakbrook Terrace, IL 60181(847) 698-1692FAX (847) 268-9694posna.orgFUTURE ANNUAL MEETINGSMay 11–15, 2021Dallas, TexasMay 11–14, 2022 Vancouver, BC, CanadaApril 26–29, 2023 Nashville, Tennesseeposna.orgorthokids.orgposnacademy.orgipos.posna.orgFUTURE IPOS MEETINGSDecember 1–5, 2020Orlando, FLDecember 7–11, 2021Orlando, FLDecember 6–10, 2022Orlando, FL