Summary: The study evaluates the impact of medial or lateral displacement of the tibial tuberosity on clinical outcomes one year after combining the Maquet procedure with Autologous Cartilage Implantation (ACI) for patellofemoral cartilage injuries, revealing that although significant improvement was observed in KOOS Quality of Life scores, patients with increased tibial tuberosity to trochlear groove (TT

Background

The Maquet tibial tubercle elevating procedure is a well-established surgical intervention for patellofemoral (PF) cartilage injuries. At our institution, we employ a combined approach of the Maquet procedure with Autologous Cartilage Implantation (ACI) for extensive PF cartilage damage. This study aims to evaluate the impact of medial or lateral displacement of the tibial tuberosity on clinical outcomes one year postoperatively.

Methods

From 2014 to 2022, nine patients (10 knees) with PF cartilage injuries who underwent the combined Maquet procedure and ACI were retrospectively reviewed. The mean cartilage defect size was 536.4 ± 213.4 mm². Clinical outcomes were assessed using the Lysholm score, International Knee Documentation Committee (IKDC) score, and Knee Injury and Osteoarthritis Outcome Score (KOOS) across five subscales both preoperatively and one year postoperatively. Patients were divided into two groups based on postoperative changes in the tibial tuberosity to trochlear groove (TT-TG) distance: Group L (increased TT-TG distance) and Group N (no change or decrease in TT-TG distance). Differences in tibial tuberosity elevation, as well as pre- and postoperative scores, were compared between the groups.

Results

There was a significant improvement in KOOS Quality of Life (QOL) scores (preoperative: 45.6 ± 16.4, postoperative: 56.3 ± 15.6) at one year postoperatively. No significant differences about the other clinical outcome measures between pre- and postoperative were observed. Comparing the two groups, there were no significant differences in tibial tuberosity elevation, preoperative Lysholm score, IKDC score, or KOOS subscales. However, postoperative IKDC scores were significantly lower in Group L (51.1 ± 6.4) compared to Group N (68.7 ± 3.3) (p < 0.05). Although there were no significant differences in postoperative Lysholm scores (L: 74.2 ± 16.9, N: 88.3 ± 8.3), KOOS Symptoms (L: 82.1 ± 8.1, N: 92.0 ± 9.4), KOOS Pain (L: 77.8 ± 11.5, N: 86.1 ± 5.6), KOOS Activities of Daily Living (ADL) (L: 87.5 ± 8.5, N: 93.7 ± 3.7), KOOS Sports (L: 53.3 ± 8.2, N: 65.0 ± 14.7), or KOOS QOL (L: 51.0 ± 17.0, N: 64.1 ± 10.7), Group L showed a trend toward lower scores in all measures.

Conclusion

The combined Maquet procedure and ACI resulted in significant improvement in KOOS QOL scores at one year postoperatively. However, Group L was associated with significantly lower IKDC scores and a trend toward poorer outcomes in other measures. These findings suggest that lateral displacement of the tibial tuberosity may be a risk factor for suboptimal clinical outcomes one year after surgery.

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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
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
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
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
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
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
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
Medial Patellotibial Ligament Reconstruction Obtains A Significant Improvement Of Patellar Stability: Motion Analytic Study ePoster Presentation Nadhaporn Saengpetch, MD, THAILAND Potsawat Surabotsopon, MD, THAILAND
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
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
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
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
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
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
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

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Influence of tibial tuberosity movement direction on postoperative outcomes of combined Maquet procedure and autologous cartilage implantation for patellofemoral cartilage injury

Influence of tibial tuberosity movement direction on postoperative outcomes of combined Maquet procedure and autologous cartilage implantation for patellofemoral cartilage injury

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Results

Conclusion

Knee Patellofemoral ePosters

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Influence of tibial tuberosity movement direction on postoperative outcomes of combined Maquet procedure and autologous cartilage implantation for patellofemoral cartilage injury

Influence of tibial tuberosity movement direction on postoperative outcomes of combined Maquet procedure and autologous cartilage implantation for patellofemoral cartilage injury

Background

Methods

Results

Conclusion