Summary: Nearly one-in-four patients with a patellar instability event may have an osteochondral fracture, and the risk of future osteochondral fracture without surgical stabilization is just less than 20%.

Background

Radiologic risk factors for osteochondral fractures associated with patellar instability events are rarely studied, particularly in patients with recurrent instability. Presence of an osteochondral fracture increases injury severity and often necessitates surgical stabilization. We hypothesize that specific radiologic characteristics will relate to increased prevalence of osteochondral fractures associated with patellar instability.

Methods

Patient data (N=730) in a prospective multi-center study were reviewed for radiologic findings. Trochlear Crossing Sign and Caton-Deschamps Index were measured on radiographs while tibial tubercle-trochlear groove (TT-TG) distance, patellar tilt, trochlear depth, trochlear bump, sulcus angle, and patellar subluxation were measured on magnetic resonance imaging. Potential radiologic risk factors were classified as At-Risk or Not At-Risk based on pathologic thresholds for general patellar instability. Patients were grouped according to presence or absence of an osteochondral fracture and analyzed with Mann-Whitney tests, Chi-Square tests, and multivariate regression modeling with a 95% confidence interval.

Results

In the total cohort (17.0 +/- 4.4 years; 57.3% female), 170/730 (23.3%) patients had an osteochondral fracture, while 76/413 (18.4%) of those with recurrent instability had an osteochondral fracture. High Caton-Deschamps Index (>1.2) was found to be protective of an osteochondral fracture with an odds ratio of 0.43, while high TT-TG distance (>=13mm) was found to be a risk factor for an osteochondral fracture with 2.17 times increased odds. Though first-time dislocations increased odds of an osteochondral fracture by 4.72 times, those with recurrent instability were found to have a similar predictive relationship of Caton-Deschamps Index and TT-TG with osteochondral fracture incidence. In Chi-Square analyses, lower Caton-Deschamps Index, shallower Trochlear Depth, smaller Trochlear Bump, and presence of Patellar Subluxation were more common in patients with osteochondral fractures. Lower Caton-Deschamps Index, positive Trochlear Crossing Sign, and shallower Trochlear Depth were more common among those with osteochondral fractures in a subset of patients with recurrent instability.

Conclusion

Nearly one-in-four patients with a patellar instability event may have an osteochondral fracture, and the risk of future osteochondral fracture without surgical stabilization is just less than 20%. Patella alta was found to be protective of osteochondral fractures in patients with first-time and recurrent instability while a lateralized tibial tubercle was found to be a risk factor. These radiologic characteristics should guide healthcare professionals on the risk of future osteochondral fracture during treatment planning after a patellar instability event.

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
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
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
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
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
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
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
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
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
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
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
Grading Severity in Trochlear Dysplasia: a Pilot Study ePoster Presentation Juan Pablo Martinez-Cano, MD, MSc, PhD, COLOMBIA
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
Weight Matters: The Causal Role Of Birth And Childhood Body Size In Rcurrent Patellar Dislocation ePoster Presentation Chao Zhang, CHINA Qian Wu, CHINA
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
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
Patellar Dislocation During Examination Under Anesthesia As A Diagnostic Test For Patellar Instability: Data From Jupiter Cohort ePoster Presentation Shital N. Parikh, MD, UNITED STATES Audrey Christine Wimberly, MPH, UNITED STATES Matthew William Veerkamp, BA, UNITED STATES Natalie K. Pahapill, BS, 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 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
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
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
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
Reporting Bias is Highly Prevalent in Systematic Reviews and Meta-Analyses of Medial Patellofemoral Ligament Reconstruction ePoster Presentation Kenneth T Nguyen, BS, UNITED STATES Erin L Brown, BA, UNITED STATES William C Rittmeyer, BS, UNITED STATES Mia Rumps, MS, UNITED STATES Mary K. Mulcahey, MD, UNITED STATES
FEMORAL MALTORSION INFLUENCES BOTH PATELLOFEMORAL AND TIBIOFEMORAL CONTACT PRESSURE. A BIOMECHANICAL EVALUATION ePoster Presentation Caterina Chiappe , MD, SPAIN Rodolfo Morales-Avalos, MD, PhD., MEXICO Joan Carles Monllau, MD, PhD, Prof., SPAIN Vicente Sanchis-Alfonso, MD, PhD, SPAIN
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
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
Factors Associated with the Decision to Perform a Lateral Retinacular Release or Lengthening During Medial Patellofemoral Ligament Reconstruction in the JUPITER Cohort ePoster Presentation Joshua T. Bram, MD, UNITED STATES Emilie Lijesen, BS, UNITED STATES Daniel W. Green, MD, MS, UNITED STATES Shae K Simpson, BS, UNITED STATES Ben E. Heyworth, MD, UNITED STATES Eric J. Wall, MD, UNITED STATES Adam B. Yanke, MD, UNITED STATES Jacqueline M. Brady, MD, UNITED STATES Lauren H Redler, MD, UNITED STATES Beth Ellen Shubin Stein, MD, UNITED STATES Shital N. Parikh, MD, UNITED STATES
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
Isolated Medial Patellofemoral Ligament Reconstruction for Recurrent Patellar Instability Regardless of Tibial Tubercle-Trochlear Groove Distance and Patellar Height: Differential Outcomes for Chondral Defects ePoster Presentation Michael Davies, MD, UNITED STATES Bennett Propp, BS, UNITED STATES William A. Marmor, MD, UNITED STATES Natalie K. Pahapill, BS, UNITED STATES Audrey Christine Wimberly, MPH, UNITED STATES Joseph T. Nguyen, MPH, UNITED STATES Beth Ellen Shubin Stein, MD, UNITED STATES Elizabeth Rose Dennis, MD MS, UNITED STATES
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
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
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
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
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
Patellar Tendon To Lateral Trochlear Ridge (PT-LTR) as an Indicator of Patellar Instability With Malalignment ePoster Presentation Brittany Margaret Ammerman, MD, MBS, UNITED STATES Ryann Davie, MD, UNITED STATES Natalie K. Pahapill, BS, UNITED STATES Bennett Propp, BS, UNITED STATES Simone Gruber, MS, UNITED STATES Joseph T. Nguyen, MPH, UNITED STATES Audrey Christine Wimberly, MPH, UNITED STATES Michelle E. Kew, MD, UNITED STATES Elizabeth Rose Dennis, MD MS, UNITED STATES Beth Ellen Shubin Stein, MD, UNITED STATES
Your Patella Dislocated: Will It Happen Again? An Assessment Of Mri Criteria For Recurrent Patella Dislocation After An Initial Event ePoster Presentation Mauricio Drummond, Jr., MD, UNITED STATES Jason Brenner, MS, UNITED STATES Steven Henick, MD, UNITED STATES Leila M. Alvandi, PhD, UNITED STATES Edina Gjonbalaj, BS, UNITED STATES Benjamin Levy, UNITED STATES Jacob Schulz, UNITED STATES Eric D. Fornari, MD, 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
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
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
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
Medial Patellotibial Ligament Reconstruction Obtains A Significant Improvement Of Patellar Stability: Motion Analytic Study ePoster Presentation Nadhaporn Saengpetch, MD, THAILAND Potsawat Surabotsopon, MD, THAILAND
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
Medial PatelloTibial Ligament Reconstruction in Pediatric and Adolescent Patients with Patella Dislocation in Flexion ePoster Presentation Olivia C. Tracey, BA, UNITED STATES Joshua T. Bram, MD, UNITED STATES Emilie Lijesen, BS, UNITED STATES Akshitha Adhiyaman, BS, UNITED STATES Ruth H. Jones, BS, UNITED STATES Shae K Simpson, BS, UNITED STATES Ryann Davie, MD, UNITED STATES Yasir Alabdulkarim, MD, SAUDI ARABIA Daniel W. Green, MD, MS, UNITED STATES
Echo Assisted Reconstruction Of The Medial Patellofemoral Ligament ePoster Presentation Alex Dante Antezana Arzabe, Médico, BOLIVIA
Outcomes of Isolated Medial Patellofemoral Ligament Reconstruction after First-Time and Recurrent Patellar Instability: Recurrence, Return to Sport, And Osteochondral Injury: Data from the JUPITER Cohort ePoster Presentation Jacqueline M. Brady, MD, UNITED STATES Bennett Propp, BS, UNITED STATES Erick Marigi, MD, UNITED STATES Elizabeth Rose Dennis, MD MS, UNITED STATES Natalie K. Pahapill, BS, UNITED STATES Haley D. Smith, BS, UNITED STATES Audrey Christine Wimberly, MPH, 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
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
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
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
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
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
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
New Sagittal Measurements To Distinguish Between Patellar Instability And Control Patients ePoster Presentation Marc Tompkins, MD, UNITED STATES Thomas Johnstone, BS, UNITED STATES Raimundo Vial, MD, CHILE Jaren LaGreca, MD, UNITED STATES Elizabeth A. Arendt, MD, UNITED STATES
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
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
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
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
An Oblique Transposition Quadricepsplasty Provides Excellent Outcomes For The Treatment Of Type Iv (Obligatory, Flexion-Range) Patellar Dislocation ePoster Presentation Philip Wilson, MD, UNITED STATES Clarissa Meza, MD, UNITED STATES Charles W. Wyatt, CPNP, UNITED STATES V. Claire Clark, BS, UNITED STATES Benjamin Johnson, PA-C, UNITED STATES Henry B. Ellis, 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
Genetic Evidence Suggests Education Reduces Risk Of Patellar Dislocation: Insights From Mendelian Randomization ePoster Presentation Chao Zhang, CHINA Qian Wu, CHINA
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
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
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
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
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
Torsional Limb Deformities In Patients With Lateral Patellar Dislocation: An Expert Survey Of The International Patellofemoral Study Group. ePoster Presentation Guido Wierer, MD, AUSTRIA Danko Dan Milinkovic, MD, GERMANY Gerd Seitlinger, MD, AUSTRIA Michael C. Liebensteiner, MD, PhD, AUSTRIA William R. Post, MD, UNITED STATES Philipp Wilhelm Winkler, MD, Assoc. Prof., AUSTRIA
Outcomes Of Arthroscopic Patella Realignment In Children And Adolescents With A Minimum 2-Year Follow Up ePoster Presentation Serafina Faith Zotter, BS, UNITED STATES Georgia Butler, -, UNITED STATES Wei Shao Tung, BS, UNITED STATES Connor Thomas Wright, BA, UNITED STATES Kristen N. Reikersdorfer, BA, UNITED STATES Nikolaos K. Paschos, MD, PhD, UNITED STATES
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
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
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
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
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
Initial Results from the Creation of a Normative Database for the Banff Patellar Instability Instrument ePoster Presentation Mark Lafave, PhD, CAT(C), CANADA Laurie A. Hiemstra, MD, PhD, FRCSC, CANADA Sarah Kerslake, BPhty, MSc, CANADA Daniel Stolear, MA, CANADA
Influence of tibial tuberosity movement direction on postoperative outcomes of combined Maquet procedure and autologous cartilage implantation for patellofemoral cartilage injury ePoster Presentation Junya Tsukisaka , MD, JAPAN Atsuo Nakamae, MD, PhD, JAPAN Akinori Nekomoto, MD, PhD, JAPAN Naofumi Hashiguchi, MD,MPH, JAPAN Shunya Tsuji, MD, JAPAN Nobuo Adachi, MD, PhD, JAPAN
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
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
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

Menu

Search Filters

Radiologic Risk Factors for Osteochondral Fractures in First-Time and Recurrent Patellar Instability Patients

Radiologic Risk Factors for Osteochondral Fractures in First-Time and Recurrent Patellar Instability Patients

Background

Methods

Results

Conclusion

Knee Patellofemoral ePosters

Sign-in to ISAKOS

Radiologic Risk Factors for Osteochondral Fractures in First-Time and Recurrent Patellar Instability Patients

Radiologic Risk Factors for Osteochondral Fractures in First-Time and Recurrent Patellar Instability Patients

Background

Methods

Results

Conclusion