Summary: Oblique transposition quadricepsplasty resulted in 100% patellar stability at intermediate term follow up with low reoperation rates, reliable improvement in PROM and range of motion, and no demonstrated benefit of concurrent MPFLR or distal realignment.

Objectives: Type IV (Obligatory, Flexion-range) patellar dislocation is a challenging condition, requiring quadriceps lengthening and often additional reconstructive procedures. Various lengthening procedures exist with varying reported results. The purpose of this study was to evaluate outcomes following an oblique transposition quadricepsplasty for the treatment of type IV patellar dislocation.

Methods

An IRB-approved retrospective review of patients treated by two pediatric sports surgeons with an oblique transposition quadricepsplasty for type IV patellar dislocation between 2015 and 2022 was accomplished; with Inclusion requiring a minimum of 2-year follow-up. All knees received an oblique distal-medial to proximal-lateral quadricepsplasty with repair in a transposed position at 90° of flexion, and an extensile lateral release and a vastus medialis lateral advancement over the quadriceps and patella. A medial patellofemoral ligament reconstruction (MPFLR) and/or distal realignment (Tibial tubercle, or patellar tendon medialization) was utilized in selected patients. Exam, operative data, complications, and re-operation were recorded. Knee Injury and Osteoarthritis Outcome Score (KOOS), Kujala Score, Pediatric Functional Activity Brief Scale (HSS Pedi-FABS) PROMs were evaluated.

Results

18 knees (16 patients) treated with an oblique transposition quadricepsplasty for type IV patellar dislocation were evaluated at an average of 3.5 years post-operatively (r= 2 - 7.4 y). Average age was 12.8 (r= 5-17) years and 9 (56%) patients were female. 6 (38%) patients had associated musculoskeletal diagnoses (DiGeorge, Fibular Hemimelia, Hypochondroplasia, Nail-Patella, Shaken Baby Syndrome, and a Undifferentiated Chromosomal disorder). 44% (8/18) knees had pre-operative extensor lag averaging 12° (r=3°-22°), with average motion arc 129° (r= 100°-147°). All had high-grade trochlear dysplasia [12 (67%) type C, 6 (33%) type D. Five (28%) knees demonstrated a patellar cartilage lesion, and 3 (17%) had a trochlear or lateral condyle cartilage lesion. Nine (50%) knees were treated with concurrent MPFLR and 9 (50%) had distal realignment. Ten (56%) had additional concurrent surgery; most commonly guided-growth implant removal, with two knees receiving concurrent lateral femoral osteochondral allografts.
At final follow-up, 100% of patients reported a stable, anterior patella with only 4 (22%) reporting an extensor lag of 11° (r=10°-15°).Motion arc and PROMs were good and all trended higher than pre-operative [motion arc: pre 129.6° (SD 13.1°) vs post 137° (SD 14.4°), p = 0.15; KOOS: pre 61.4 (SD 18.9) vs post 80.6 (SD 6.5), p = 0.065; Kujala: pre 62.8 (SD 14.5) vs post 81.8 (SD 8.4), p = 0.064] and Pedi-FABS was unchanged (14.4 vs 12.2; p = 0.18). There was 1 (5.6%) Clavien-Dindo (CD) type III complication (reoperation for arthrofibrosis in a case with concurrent osteochondral allograft), and 1 (5.6%) CD II complication (superficial wound dehiscence). There were no differences in patellar stability, re-operation, motion, extensor lag, or PROM in patients treated with isolated oblique quadricepsplasty compared with those receiving additional MPFLR or distal realignment.

Conclusions

Oblique transposition quadricepsplasty resulted in 100% patellar stability at intermediate term follow up with low reoperation rates in this challenging type IV patellar dislocation population. Reliable improvement in PROM and range of motion was achieved with no demonstrated benefit of concurrent MPFLR or distal realignment.

Clinical Outcomes For MPFL Reconstruction After First-Time Vs. Recurrent Patella Dislocations ePoster Presentation Serafina Faith Zotter, BS, UNITED STATES Georgia Butler, -, UNITED STATES Wei Shao Tung, BS, UNITED STATES Kristen N. Reikersdorfer, BA, UNITED STATES Connor Thomas Wright, BA, UNITED STATES Nikolaos K. Paschos, MD, PhD, UNITED STATES
Genetic Evidence Suggests Education Reduces Risk Of Patellar Dislocation: Insights From Mendelian Randomization ePoster Presentation Chao Zhang, CHINA Qian Wu, CHINA
Radiographic Landmarks Of Medial Patellofemoral Ligament Reconstruction: A Systematic Review And Meta-Analysis Of Femoral Tunnel Position ePoster Presentation Maeve Williams, BS, UNITED STATES Katherine L. Esser, BS, UNITED STATES Larry Chen, BS, UNITED STATES Bradley Austin Lezak, MD, MPH, UNITED STATES Heath Patrick Gould, MD, UNITED STATES Alexander Golant, MD, UNITED STATES Daniel James Kaplan, MD, UNITED STATES
The Interaction of Race and Socioeconomic Deprivation in Treatment of Patellofemoral Instability: Data from the JUPITER Cohort ePoster Presentation Jacqueline M. Brady, MD, UNITED STATES Elizabeth Rose Dennis, MD MS, UNITED STATES Bennett Propp, BS, UNITED STATES Justin Hicks, UNITED STATES Heath Patrick Gould, MD, UNITED STATES Natalie K. Pahapill, BS, UNITED STATES Audrey Christine Wimberly, MPH, UNITED STATES Joseph T. Nguyen, MPH, UNITED STATES Matthew William Veerkamp, BA, UNITED STATES Eric J. Wall, MD, UNITED STATES Shital N. Parikh, MD, UNITED STATES Beth Ellen Shubin Stein, MD, UNITED STATES
Incidence Of False Positives Pathological Patellar Tilt Angle due to Knee Internal Torsion ePoster Presentation Ricardo D. Manilov, MD, ARGENTINA Camilo P. Helito, MD, PhD, Prof, BRAZIL Sebastian Maldonado, MD, ARGENTINA Estefania I Vrancovich, MD, ARGENTINA Adrian David Borbore, MD, ARGENTINA MARTIN ALEJANDRO BRUNO, MD, ARGENTINA
Clinical And Radiographic Results After Isolated Mpfl Reconstruction For Patella Instability ePoster Presentation Theodoros Mylonas, MD, MSc, GREECE Alexandros Koskiniotis, MD, MSc, GREECE Efstathios Konstantinou, MD, MSc, UNITED STATES Georgios Komnos, MD, PhD, GREECE Vasileios Raoulis, MD, PhD, GREECE Michael E. Hantes, MD, PhD, Prof., GREECE
Is Quadricep Tendon A Suitable Graft Option For Medial Patellofemoral Ligament Reconstruction? A Systematic Review And Meta-Analysis. ePoster Presentation Tahir Khaleeq, MBBS, MRCSED, PG DIP MED ED , UNITED KINGDOM Muaaz Tahir, BSc, MBBS, FRCS (Tr & Orth), FSEM(UK), UNITED KINGDOM Abu Zer Saeed, MBChB, BSc, MRCS, UNITED KINGDOM Osama Adil Aweid, MBBS BSc MSc FRCS MFSEM, UNITED KINGDOM Tamer Sweed, FRCS(Orth), UNITED KINGDOM Tarek Boutefnouchet, MBChB MRCS PGCMed MSc FRCS (Tr&Orth) Dip. FIFA Med, UNITED KINGDOM Peter D'Alessandro, MBBS (Hons), FAOrthA, FRACS, AUSTRALIA Shahbaz S. Malik, BSc, MB BCh, MSc (Orth Engin), LLM, FRCS (Tr&Orth), UNITED KINGDOM
Histologic Analysis Of The MPFL And MQTFL Fibers Demonstrate A Single Ligamentous Complex ePoster Presentation Miho J. Tanaka, MD, PhD, UNITED STATES Yin Hung, MD, UNITED STATES Jorge Chahla, MD, PhD, UNITED STATES Jorge Alfredo Uquillas, PhD., Msc., NETHERLANDS
How Should I Measure Proximal Femoral Version In Torsional Deformity? A New, Easy And Reproducible Measurement Method Using Maximum Intensity Projection (Mip) Imaging On Ct Scan. ePoster Presentation Federica Rosso, MD, ITALY Marco Bechis, ITALY Giorgio Governale, MD, ITALY Antonino Cantivalli, MD, ITALY Francesco Liberace, MD, ITALY Roberto Rossi, MD, ITALY Davide Bonasia, MD, ITALY
Judet’s extensive quadriceps release and “à la carte” combined procedures for patellar dislocation In flexion ePoster Presentation Moritz Konkel, MD, SWITZERLAND Nicolas Cance, MD, FRANCE Franck P. D. A. Chotel, MD, PhD, Prof., FRANCE
The Short-Term Clinical Results of Isolated Medial Patellofemoral Ligament Reconstruction in Patellar Dislocation: Comparing Superficial Quadriceps Tendon and Hamstring Tendon ePoster Presentation Yuki Suzuki, MD, PhD, JAPAN Yoshimitsu Aoki, MD, PhD, JAPAN Chiharu Inoue, MD, JAPAN Hisashi Matsumoto, PT, JAPAN Satoru Kaneko, MD, JAPAN Kazunori Yasuda, MD, PhD, Prof., JAPAN Tomonori Yagi, MD, PhD, JAPAN Masayuki Inoue, MD, PhD, JAPAN Takuma Katou, MD, JAPAN Eiji Kondo, MD, PhD, JAPAN Harukazu Tohyama, MD, PhD, JAPAN Norimasa Iwasaki, MD, PhD, JAPAN
Return to Sports is Faster with Combined Reconstruction of the MPFL and MQTFL Compared to Isolated MPFL Reconstruction: Preliminary Results ePoster Presentation Luís Duarte Silva, MD, PORTUGAL Cristina Valente, PhD, PORTUGAL Eluana Gomes, PhD, PORTUGAL Cátia Cardoso, Bsc, PORTUGAL Alberto Monteiro, MD, PORTUGAL Nuno Pais, MD, MSc, PhD student, PORTUGAL Bruno S. Pereira, MD, PhD, Prof., PORTUGAL Tiago Barbosa Da Frada, MD, PORTUGAL Renato Andrade, PhD student, PORTUGAL João Espregueira-Mendes, MD, PhD, Full Prof., PORTUGAL
There is a Difference in Preoperative Through-the-Knee Femorotibial Rotation in Pediatric Patients with Anterior Cruciate Ligament Rupture Versus Patients with Patellofemoral Instability ePoster Presentation Danielle E. Chipman, BS, UNITED STATES Nicolas Pascual-Leone, MD, UNITED STATES Preston W Gross, BS, UNITED STATES Emilie Lijesen, BS, UNITED STATES Shae K Simpson, BS, UNITED STATES Roger F Widmann, MD Peter D. Fabricant, MD, MPH, UNITED STATES Daniel W. Green, MD, MS, UNITED STATES
Echo Assisted Reconstruction Of The Medial Patellofemoral Ligament ePoster Presentation Alex Dante Antezana Arzabe, Médico, BOLIVIA
Medial Patellotibial Ligament Reconstruction Obtains A Significant Improvement Of Patellar Stability: Motion Analytic Study ePoster Presentation Nadhaporn Saengpetch, MD, THAILAND Potsawat Surabotsopon, MD, THAILAND
High Success And Low Complication Rates Following Revision Tibial Tubercle Osteotomy ePoster Presentation Nathan Varady, MD, MBA, UNITED STATES Tyler James Uppstrom, MD, UNITED STATES Aakash Shah, BA, UNITED STATES Morgan Rizy, BA, UNITED STATES Ava Neijna, BA, UNITED STATES Andreas H. Gomoll, MD, UNITED STATES Sabrina M. Strickland, MD, UNITED STATES
The Lateral Patellar Retinaculum is Thicker in Pediatric and Adolescent Patients with Patellofemoral Instability ePoster Presentation Danielle E. Chipman, BS, UNITED STATES Peter Cirrincione, MD, UNITED STATES Emilie Lijesen, BS, UNITED STATES Shae K Simpson, BS, UNITED STATES Danielle S Gorelick, NP, UNITED STATES Douglas Mintz, MD, UNITED STATES Daniel W. Green, MD, MS, UNITED STATES
Quantitative Assessment of Knee Joint Kinematics In Patients with Recurrent Patellar Dislocation – Using a 3D-3D Surface Registration Technique and 4-D CT Analysis – ePoster Presentation Kazuya Kaneda, MD, PhD, JAPAN Kengo Harato, MD, PhD, JAPAN Satoshi Oki, MD, PhD, JAPAN Yutaro Morishige, MD, PhD, JAPAN Shu Kobayashi, MD, PhD, JAPAN Yasuo Niki, MD, PhD, JAPAN Tatsuaki Matsumoto, MD, PhD, JAPAN Ryo Sasaki, MD, PhD, JAPAN Masaya Nakamura, MD, PhD, JAPAN Takeo Nagura, MD, JAPAN
The Dejour Classification for Trochlear Dysplasia: Are We Speaking the Same Language? ePoster Presentation Juan Pablo Martinez-Cano, MD, MSc, PhD, COLOMBIA Betina B. Hinckel, MD, PhD, UNITED STATES Alejandro Gallego, MD, COLOMBIA Maria Tuca, MD, CHILE
Cross-Cultural Translation and Validation of The Spanish Version of The Norwich Patellofemoral Instability (NPI) Score ePoster Presentation Juan Pablo Martinez-Cano, MD, MSc, PhD, COLOMBIA Alejandro Gallego, MD, COLOMBIA Maria Camila Gomez Ayala, MD, MSc, COLOMBIA Giovani A. Gravini-Amador, MD, COLOMBIA Sebastián Mejía, MD, COLOMBIA
Anatomical Risk Factors For Patellofemoral Instability Differ Among Patients With Trochlear Dysplasia Depending On Their Dejour Classification ePoster Presentation Martin Hartmann, MD, SWITZERLAND Berfin Caliskan, SWITZERLAND Lazaros Vlachopoulos, MD, PhD, SWITZERLAND Jakob Ackermann, MD, SWITZERLAND Sandro Fucentese, Prof MD, SWITZERLAND
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Translation and Validation of The Spanish Version of The Banff Patellofemoral Instability Instrument 2.0 (BPII) ePoster Presentation Juan Pablo Martinez-Cano, MD, MSc, PhD, COLOMBIA Alejandro Gallego, MD, COLOMBIA Johan Von Heideken, MD, PhD, SWEDEN
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Morphological risk of the femur causing anterior cruciate ligament (ACL) injuries : comparative 3-Dimensional mean model analysis of ACL and non-injured patients ePoster Presentation So Heun Lee, M.S - Ph.D.student, KOREA, REPUBLIC OF Min Jung, MD, PhD, KOREA, REPUBLIC OF Kwangho Chung, MD, KOREA, REPUBLIC OF Hyun-Soo Moon, MD, PhD, KOREA, REPUBLIC OF Se-Han Jung, MD, KOREA, REPUBLIC OF Sung-Hwan Kim, MD, PhD, KOREA, REPUBLIC OF
Weight Matters: The Causal Role Of Birth And Childhood Body Size In Rcurrent Patellar Dislocation ePoster Presentation Chao Zhang, CHINA Qian Wu, CHINA
Significantly Greater Incidence Of Patella Fracture After Medial Patellofemoral Ligament Reconstruction For Patients Age 20 And Under ePoster Presentation Brendan Fitzgerald, BS, UNITED STATES Cale A. Jacobs, PhD, UNITED STATES Christian Lattermann, MD, UNITED STATES Miho J. Tanaka, MD, PhD, UNITED STATES
OCCURRENCE OF PATELLOFEMORAL OSTEOARTHRITIS AT MEDIUM AND LONG-TERMS AFTER ISOLATED RECONSTRUCTION OF THE MEDIAL PATELLOFEMORAL LIGAMENT WITH MEDIAL THIRD OF THE PATELLAR TENDON ePoster Presentation Fabiano Kupczik, MD, PhD, MSc, BRAZIL Marlus Eduardo Gunia Schiavon, BRAZIL Bruno Sbrissia, MD, BRAZIL Marvin Durante Brunet, MD, BRAZIL Riccardo Gomes Gobbi, MD, PhD, BRAZIL
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Efficacy of Single Intra-Articular 2% Sodium Hyaluronate Versus Corticosteroid Injection in Isolated Patellofemoral Osteoarthritis: A Double-Blind, Randomized Controlled Trial ePoster Presentation Pratchaya Manop, MD, THAILAND Korawish Mekariya, MD, THAILAND Bancha Chernchujit, Prof.Dr.med, THAILAND
Three-Dimensional CT Bone Model Improves Interobserver Reliability of Trochlea Dysplasia Using the Dejour Classification in Patients with Patellar Dislocation ePoster Presentation Rika Shigemoto, MD, JAPAN Kanto Nagai, MD, PhD, JAPAN Kyohei Nishida , MD, PhD, JAPAN Kohei Kamada, MD, PhD, UNITED STATES Tetsuya Yamamoto, MD, PhD, JAPAN Yuta Nakanishi, MD, PhD, JAPAN Noriyuki Kanzaki, MD, PhD, JAPAN Yuichi Hoshino, MD, PhD, JAPAN Takehiko Matsushita, MD, PhD, JAPAN Ryosuke Kuroda, MD, PhD, JAPAN
Headless Screw Fixation Lowers Re-Operation Rate Following Tibial Tubercle Osteotomy ePoster Presentation Ran Atzmon, MD, ISRAEL Aimee Steen, MS2, UNITED STATES Kinsley J Pierre, BS (Student), UNITED STATES Monica S. Vel, BS, UNITED STATES Nicole Segovia Pham, MPH, UNITED STATES Kenneth Lin, MD, UNITED STATES Seth L. Sherman, MD, UNITED STATES
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Analyzing the Alignment Error in Tibial Tuberosity-Trochlear Groove Distance (TT-TG) in Clinical Scans Using 2D and 3D Methods ePoster Presentation Johannes M. Sieberer, MSc, AUSTRIA Nancy Park, BS, UNITED STATES Shelby T Desroches, MS, UNITED STATES Albert L. Rancu, BS, UNITED STATES Curtis McDonald, MASc, UNITED STATES Armita Razieh Manafzadeh, PhD, UNITED STATES Steven Tommasini, PhD, UNITED STATES Daniel Wiznia, MD John P. Fulkerson, MD, UNITED STATES
Comparative Clinical and Radiographic Outcomes of Particulated Juvenile Articular Cartilage Implantation in Shouldered and Unshouldered Patella Cartilage Lesions ePoster Presentation Ryann Davie, MD, UNITED STATES Brittany Margaret Ammerman, MD, MBS, UNITED STATES Bennett Propp, BS, UNITED STATES Erick Marigi, MD, UNITED STATES William A. Marmor, MD, UNITED STATES Kiera A. Kingston, MD, UNITED STATES Natalie K. Pahapill, BS, UNITED STATES Alissa J. Burge, MD, UNITED STATES Audrey Christine Wimberly, MPH, UNITED STATES Joseph T. Nguyen, MPH, UNITED STATES Elizabeth Rose Dennis, MD MS, UNITED STATES Beth Ellen Shubin Stein, MD, UNITED STATES
Grading Severity in Trochlear Dysplasia: a Pilot Study ePoster Presentation Juan Pablo Martinez-Cano, MD, MSc, PhD, COLOMBIA
Risk Factors For Patellofemoral Cartilage Lesions In Patients With Trochlear Dysplasia In The Setting Of Patellar Instability ePoster Presentation Jakob Ackermann, MD, SWITZERLAND Berfin Caliskan, SWITZERLAND Martin Hartmann, MD, SWITZERLAND Lazaros Vlachopoulos, MD, PhD, SWITZERLAND Sandro Fucentese, Prof MD, SWITZERLAND
Tibial Tuberosity to Trochlear Groove Distance (TT-TG): A Breakdown into Two Principal Components ePoster Presentation Johannes M. Sieberer, MSc, AUSTRIA Nancy Park, BS, UNITED STATES Shelby T Desroches, MS, UNITED STATES Kelsey Brennan, UNITED STATES Albert L. Rancu, BS, UNITED STATES Armita Razieh Manafzadeh, PhD, UNITED STATES John Andrew Lynch, PhD, UNITED STATES Neil Segal, MD, MS, UNITED STATES Cora E. Lewis, MD, MSPH, UNITED STATES David T. Felson, MD, MPH, UNITED STATES Daniel Wiznia, MD John P. Fulkerson, MD, UNITED STATES
The length of the popliteus on sagittal views correlates with high tibiofemoral rotations and patellar instability ePoster Presentation Shelby T Desroches, MS, UNITED STATES Nancy Park, BS, UNITED STATES David Frumberg, UNITED STATES John P. Fulkerson, MD, UNITED STATES Johannes M. Sieberer, MSc, AUSTRIA
Predictors of Increased Complication Rate Following Tibial Tubercle Osteotomy (TTO) ePoster Presentation Kevin Michael Lehane, DO, UNITED STATES Isabel Wolfe, BA, UNITED STATES Alison Buseck, BS, UNITED STATES Michael Moore, BA, UNITED STATES Larry Chen, BS, UNITED STATES Eric Strauss, UNITED STATES Laith M. Jazrawi, MD, UNITED STATES Alexander Golant, MD, UNITED STATES
Surgical Management of First-Time Patellar Dislocations in Pediatric Patients May Lower Rates of Redislocation Compared to Conservative Management: A Systematic Review and Meta-Analysis ePoster Presentation Benjamin Blackman, BHSc. (Honors), CANADA Joshua Dworsky-Fried, BHSc, CANADA Dan Cohen, MD, CANADA David Slawaska-Eng, MDCM, CANADA Lauren Alexandra Gyemi, MD, CANADA Nicole Simunovic, MSc, CANADA Devin Clarke Peterson, MD, FRCSC, Dip Sport Med, CANADA Olufemi R. Ayeni, MD, PhD, MSc, FRCSC, CANADA Darren L. de SA, MD MBA FRCSC, CANADA
The Effect Of Tibial Tubercle Osteotomy And Trochleoplasty On Femorotibial Rotation In Patients With Patellar Instability ePoster Presentation Martin Hartmann, MD, SWITZERLAND Lukas Jud, MD, SWITZERLAND Florian B. Imhoff, MD, Priv.-Doz., SWITZERLAND Lazaros Vlachopoulos, MD, PhD, SWITZERLAND Jakob Ackermann, MD, SWITZERLAND Sandro Fucentese, Prof MD, SWITZERLAND
The Prevalence Of Associated Anatomical Risk Factors For Patellofemoral Joint Pathology In Patients Undergoing Rotational Osteotomy And The Implication For The Level Of Correction. ePoster Presentation Martyn Snow, FRCS, UNITED KINGDOM Gwithyen Silk, FRCS, MRCS, MBChB, BA (Hons), MA, UNITED KINGDOM Mohammad Mahmoud Mohammad Mahmoud Haikal, MBChB , MSc(Orth), EGYPT
A Prospective Cohort Study Investigating the Safety and Efficacy of Tibial Tubercle Osteotomy Using a Novel Multi-Directional Tibial Tubercle Transfer System ePoster Presentation Ran Atzmon, MD, ISRAEL Aimee Steen, MS2, UNITED STATES Kinsley J Pierre, BS (Student), UNITED STATES Monica S. Vel, BS, UNITED STATES Nicole Segovia Pham, MPH, UNITED STATES Kenneth Lin, MD, UNITED STATES Seth L. Sherman, MD, UNITED STATES
Curvature Analysis Of The Distal Femur As A Tool To Classify Trochlear Dysplasia ePoster Presentation Johannes M. Sieberer, MSc, AUSTRIA Nancy Park, BS, UNITED STATES Armita Razieh Manafzadeh, PhD, UNITED STATES Madhusudhan Venkadesan , PhD, Prof., UNITED STATES John P. Fulkerson, MD, UNITED STATES
How Much Improvement in Patient-Reported Outcome Measures After Isolated Medial Patellofemoral Ligament Reconstruction is Associated with Surgeon-Defined Satisfactory Outcomes? A Jupiter Study ePoster Presentation Shital N. Parikh, MD, UNITED STATES Saral Patel, MD, UNITED STATES Matthew William Veerkamp, BA, UNITED STATES Eric J. Wall, MD, UNITED STATES Daniel W. Green, MD, MS, UNITED STATES Philip Wilson, MD, UNITED STATES Ben E. Heyworth, MD, UNITED STATES Henry B. Ellis, MD, UNITED STATES Marc Tompkins, MD, UNITED STATES Jacqueline M. Brady, MD, UNITED STATES The JUPITER Group, UNITED STATES Beth Ellen Shubin Stein, MD, UNITED STATES
CLINICAL AD RADIOLOGICAL OUTCOMES AFTER ISOLATED MEDIAL PATELLOFEMORAL RECONSTRUCTION FOR RECURRENT PATELLAR DISLOCATION WITH COMPLETELY IMPLANT FREE TECHNIQUE AMONG POPULATION OF YOUNG SPORT PATIENTS ePoster Presentation Matteo Baldassarri, MD, ITALY Luca Perazzo, MD, ITALY Diego Ghinelli, ITALY Sarino Ricciardello, MD, ITALY Alessandro Parma, MD, ITALY Roberto Buda, Prof., ITALY
Outcomes of Skeletally Immature Patients Undergoing Isolated Medial Patellofemoral Ligament Reconstruction: Data from the JUPITER Cohort ePoster Presentation Lauren H Redler, MD, UNITED STATES Elizabeth Rose Dennis, MD MS, UNITED STATES Bennett Propp, BS, UNITED STATES Heath Patrick Gould, MD, UNITED STATES Natalie K. Pahapill, BS, UNITED STATES Audrey Christine Wimberly, MPH, UNITED STATES Matthew William Veerkamp, BA, UNITED STATES Joseph T. Nguyen, MPH, UNITED STATES Eric J. Wall, MD, UNITED STATES Daniel W. Green, MD, MS, UNITED STATES Beth Ellen Shubin Stein, MD, UNITED STATES Shital N. Parikh, MD, UNITED STATES
Increased TT-TG and Sulcus Angle are Associated with Patella Osteochondritis Dissecans ePoster Presentation Emilie Lijesen, BS, UNITED STATES Akshitha Adhiyaman, BS, UNITED STATES Olivia C. Tracey, BA, UNITED STATES Joshua T. Bram, MD, UNITED STATES Nnaoma M Oji, MD, UNITED STATES Danielle E. Chipman, BS, UNITED STATES Shae K Simpson, BS, UNITED STATES Douglas Mintz, MD, UNITED STATES Peter D. Fabricant, MD, MPH, UNITED STATES Daniel W. Green, MD, MS, UNITED STATES
Utility of 3D biomodels in the surgical planning of femoral derotational osteotomies ePoster Presentation Caterina Chiappe , MD, SPAIN Alejandro Roselló-Añón, PhD, SPAIN Vicente Sanchis-Alfonso, MD, PhD, SPAIN Joan Carles Monllau, MD, PhD, Prof., SPAIN Julio Domenech-Fernández, PhD, SPAIN
The Flexion Angle and the Intra-Articular Version in Different MRI Recording Techniques Influence the Tibial Tuberosity - Trochlea Groove Distance ePoster Presentation Ole Grunenberg, MD, GERMANY Lucas K. Palma Kries, MD, GERMANY Michael J. Raschke, MD, Prof., GERMANY Christian Peez, MD, GERMANY Luise M. Hägerich, MD, GERMANY Elmar Herbst, MD, PhD, GERMANY Christoph Kittl, MD, MD(res), GERMANY Adrian Deichsel, MD, GERMANY
TT-TG Ratio Provides a More Accurate Estimation of the Amount of Tibial Tubercle Medialization Needed in Patellofemoral Instability ePoster Presentation Tomas Pineda, MD, CHILE Nicolas Cance, MD, FRANCE Michael J. Dan, Mbbs, PhD, MSc(res), FRACS(oath), AUSTRALIA Guillaume Demey, MD, FRANCE David H. Dejour, MD, FRANCE
Pure Distalization Tibial Tubercle Osteotomy Does Not Result In Posteriorization Of The Tibial Tubercle ePoster Presentation Nathan Varady, MD, MBA, UNITED STATES Nicolas Pascual-Leone, MD, UNITED STATES Ava Neijna, BA, UNITED STATES Andreas H. Gomoll, MD, UNITED STATES Sabrina M. Strickland, MD, UNITED STATES
Effects of Fear of Re-Injury, Other Psychological Factors, and Sport Played on Return to Sport Following Operative Treatment for Patellar Instability ePoster Presentation Patrick C. Ryan, MS, UNITED STATES Idaleen C. Ching, BS, UNITED STATES Victoria K. Ierulli, MS, UNITED STATES Mary K. Mulcahey, MD, UNITED STATES
Is it correct to perform lateral release in combination with MPFL reconstruction in patients with acute patellar dislocation? A finite element analysis study ePoster Presentation Giuseppe Salvatore, MD, PhD, ITALY Alessandra Berton, MD, ITALY Alexander Orsi, PhD, AUSTRALIA Jonathan Egan, BS, MEng, UNITED STATES Amin Mohamadi, MD, MPH, UNITED STATES Joseph P. DeAngelis, MD, UNITED STATES Arun Ramappa, MD, UNITED STATES Umile Giuseppe Longo, MD, MSc, PhD, Prof., ITALY Ara Nazarian, PhD, UNITED STATES
Association Between Articular Incongruence Post-Trochleoplasty And Long-Term Patellofemoral Osteoarthritis ePoster Presentation Tomas Pineda, MD, CHILE Nicolas Cance, MD, FRANCE Michael J. Dan, Mbbs, PhD, MSc(res), FRACS(oath), AUSTRALIA Guillaume Demey, MD, FRANCE David H. Dejour, MD, FRANCE
Results Of Mpfl Reconstruction Using Soft Tissue Fixation Technique Associated With A Procedure On The Att For Patellar Instability : An Average Follow-Up Of 8.8 Years ePoster Presentation Marine Aubey, Student, FRANCE Aurore Emery, Resident, FRANCE Alexandre FERREIRA, PhD, FRANCE Rachel Le Dréau, MD, FRANCE Gregoire Duval, MD, FRANCE Gaëlle MAROTEAU, MD, FRANCE Christophe H. Hulet, MD, Prof., FRANCE
Accuracy Of The Patella Alta Assesment Is Poor – Dynamic Vs Static Patellar Height In Relation To Femoral Trochlea ePoster Presentation Petri J. Sillanpää, MD, PhD, FINLAND Timo Rahnel, MD, ESTONIA Aleksi Reito, MD, PhD, FINLAND Antti Launonen, MD, PhD, FINLAND
Partial Lateral Patellar Facetectomy Is Beneficial For Patients With Patellofemoral Osteoarthritis: A Systematic Review and Meta-Analysis ePoster Presentation Kennan Yeo, MBBS, SINGAPORE Shawn Js Seah, MBBS, SINGAPORE Mark H.X. Yeo, MBBS, SINGAPORE Winston Lim, MBBS, MRCS, M.Med, SINGAPORE Denny T. T. Lie, MBBS, FRCS, FAMS, SINGAPORE
Effect Of Distal Femoral Osteotomy For Valgus Correction On Change In Patellar Height ePoster Presentation Jacob Milner, MD, UNITED STATES Michael Moore, BA, UNITED STATES Jose Perez MD, MD, UNITED STATES Eric Strauss, UNITED STATES Michael J Alaia, MD, UNITED STATES Abigail Campbell, MD, UNITED STATES Alexander Golant, MD, UNITED STATES
Adductor Sling Versus Anatomical Technique In Medial Patellofemoral Ligament Reconstruction: A Retrospective Multicenter Study ePoster Presentation Rodrigo Guiloff, MD, Prof, CHILE Jose Tomas Arteaga, MD, Knee fellow, CHILE Jorge Simon Isla, MD, CHILE José Luis Prado, Md, CHILE Francisco Figueroa, MD, CHILE Alex Vaisman, MD, Prof., CHILE Rafael Calvo, MD, CHILE David H. Figueroa, MD, CHILE
Intra And Inter-Observer Reliability Of The Dh Dejour V2 Classification For Trochlear Dysplasia Using Radiographs Combined With Mri. ePoster Presentation Michael J. Dan, Mbbs, PhD, MSc(res), FRACS(oath), AUSTRALIA Nicolas Cance, MD, FRANCE Edoardo Giovannetti De Sanctis, MD, FRANCE Tomas Pineda, MD, CHILE David H. Dejour, MD, FRANCE
Straight Anteriorization Tibial Tubercle Osteotomy Is Safe and Effective for Patellofemoral Cartilage Lesions ePoster Presentation Nathan Varady, MD, MBA, UNITED STATES Arjun Khorana, BA, UNITED STATES Riley J. Williams, MD, UNITED STATES
3D-Pass (3D Patellar Instability Anatomical Severity Score): A Novel Metric Using Machine Learning To Predict Treatment Outcome In Patella Instability ePoster Presentation Marissa Lee Sinopoli, PhD, UNITED STATES Anthony Gatti, PhD, UNITED STATES Christian E Wright, BS, UNITED STATES Anna Bartsch, MD, SWITZERLAND Matthew William Veerkamp, BA, UNITED STATES Akshay Chaudhari, PhD, UNITED STATES Beth Ellen Shubin Stein, MD, UNITED STATES Shital N. Parikh, MD, UNITED STATES Kevin G. Shea, MD, UNITED STATES Scott Delp, PhD, UNITED STATES Seth L. Sherman, MD, UNITED STATES The JUPITER Group, UNITED STATES
From Clinic To Smartphone: A Randomized Controlled Trial Of A Novel Digital Therapeutic For Patellofemoral Pain Integrating Exercise And Cognitive-Behavioral Therapy ePoster Presentation Jae-Young Park, MD, KOREA, REPUBLIC OF Sanghee Lee, MD, KOREA, REPUBLIC OF Chan Yoon, MD, MS, KOREA, REPUBLIC OF Jin-Goo Kim, MD, PhD, KOREA, REPUBLIC OF Jong-Min Kim, MD, PhD, KOREA, REPUBLIC OF Sang Hak Lee, MD, PhD, KOREA, REPUBLIC OF Moon Jong Chang, Prof., KOREA, REPUBLIC OF Kyu Sung Chung, MD, PhD, Prof., KOREA, REPUBLIC OF Man-Soo Kim, MD, PhD, KOREA, REPUBLIC OF Seong-Hwan Kim, MD,Ph.D, MStat, KOREA, REPUBLIC OF Dong Jin Ryu, MD, PhD, Prof., KOREA, REPUBLIC OF Chong Bum Chang, MD, PhD, KOREA, REPUBLIC OF
3D Curvature Analysis as a Visualization Tool for Trochlea Dysplasia ePoster Presentation Johannes M. Sieberer, MSc, AUSTRIA Nancy Park, BS, UNITED STATES Shelby T Desroches, MS, UNITED STATES Curtis McDonald, MASc, UNITED STATES Kelsey Brennan, UNITED STATES Armita Razieh Manafzadeh, PhD, UNITED STATES Steven Tommasini, PhD, UNITED STATES Daniel Wiznia, MD John P. Fulkerson, MD, UNITED STATES

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An Oblique Transposition Quadricepsplasty Provides Excellent Outcomes For The Treatment Of Type Iv (Obligatory, Flexion-Range) Patellar Dislocation

An Oblique Transposition Quadricepsplasty Provides Excellent Outcomes For The Treatment Of Type Iv (Obligatory, Flexion-Range) Patellar Dislocation

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Results

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An Oblique Transposition Quadricepsplasty Provides Excellent Outcomes For The Treatment Of Type Iv (Obligatory, Flexion-Range) Patellar Dislocation

An Oblique Transposition Quadricepsplasty Provides Excellent Outcomes For The Treatment Of Type Iv (Obligatory, Flexion-Range) Patellar Dislocation

Methods

Results

Conclusions