SynthesisKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2019
Recurrent patellar dislocations: trochleoplasty improves the results of medial patellofemoral ligament surgery only in severe trochlear dysplasia.
Synthesis in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 53 citations in OpenAlex.
- Medial patellofemoral ligament reconstruction with and without trochleoplasty for patients with patella instability-correlation of trochlear dysplasia and patient outcome, classification and outcome measure in the past decade-a systematic review.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2022Pooled it
- Femoral tunnel malposition is the most common indication for revision medial patellofemoral ligament reconstruction with promising early outcomes following revision reconstruction: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022Pooled it
- Surgical Treatment of Patellofemoral Instability in Children: Lessons From a 10-Year Single-Center Experience.Cureus · 2026Article
- Beyond the medial patellofemoral ligament: The role of concomitant bony procedures in recurrent patellar instability.Bulletin of the Hospital for Joint Disease (2013) · 2026Review
- Very low dislocation rate and good clinical outcome after Bereiter trochleoplasty and additional procedures following the Copenhagen patella-femoral instability algorithm: One- and two-years outcomes from a consecutive cohort of 368 cases.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- Post-operative joint stiffness after Bereiter trochleoplasty does not affect 2-year improvement in patient-reported outcomes. A prospective cohort study of 374 Bereiter trochleoplasties.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- Management of first-time patellar dislocation: The ESSKA 2024 formal consensus-Part 2.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- Thin flap sulcus-deepening trochleoplasty in patellar instability yields good functional outcomes without progressive cartilage deterioration in the short-term follow-up-A retrospective single-surgeon cohort study.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- A Landscape of Recent Literature on the Predictors of Success and Failure in Medial Patellofemoral Ligament Reconstruction.Orthopedic reviews · 2025Article
- The 50 most cited studies on trochleoplasty.Journal of experimental orthopaedics · 2025Review
- The Femoral Sulcus Deepening Trochleoplasty of Lyon.Arthroscopy techniques · 2023Article
- The Influence of Surgical Realignment Procedures on Dynamic Patellar Tracking: A Dynamic Magnetic Resonance Imaging-Controlled Feasibility Study.Diagnostics (Basel, Switzerland) · 2022Article
- The severity of patellar and trochlear dysplasia are correlated.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022Article
- A new factor predicting excessive femoral anteversion in patients with recurrent patellar dislocation.Journal of orthopaedic surgery and research · 2022Article
- Derotational Femoral Osteotomy for Treating Recurrent Patellar Dislocation in the Presence of Increased Femoral Anteversion: A Systematic Review.Orthopaedic journal of sports medicine · 2021Review
- The presence of a preoperative high-grade J-sign and femoral tunnel malposition are associated with residual graft laxity after MPFL reconstruction.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021Article
- Clinical Outcomes and Prognostic Factors in Patients With Recurrent Patellar Lateral Dislocation Treated With Isolated Medial Patellofemoral Ligament Reconstruction: A Retrospective Single-Center Analysis.Orthopaedic journal of sports medicine · 2021Article
- Malalignment sign on knee magnetic resonance imaging: a new predictor for excessive femoral anteversion in patients with patellar dislocation.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021Article
- Evidence-based Risk Stratification for Sport Medicine Procedures During the COVID-19 Pandemic.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2020Article
- Precise Arthroscopic Mini-trochleoplasty and Medial Patellofemoral Ligament Reconstruction for Recurrent Patellar Instability With Severe Trochlear Dysplasia.Arthroscopy techniques · 2020Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeMedial patellofemoral ligament (MPFL) surgery combined with trochleoplasty (TP), is often performed to restore the normal patellofemoral biomechanics avoiding recurrent lateral patellar dislocation (LPD) in patients with trochlear dysplasia (TD). However, it is still unclear whether combining TP and MPFL surgery would be more beneficial than performing MPFL surgery on its own. This meta-analysis quantitatively synthesizes and compares published data on the outcomes of recurrent LPD treatment using MPFL surgery without or with TP in patients affected by TD.
methodsA systematic literature search about the treatment of recurrent LPD in the presence of TD was conducted. The primary outcome was redislocation rate, analyzed for different types of TD. Kujala, and IKDC scores, as well as complication rate, were also analyzed through a separate meta-analysis.
resultsNo statistically significant difference was found in the overall redislocation rate of MPFL surgery without and with TP. There was, however, a statistically significant difference (p < 0.001) in redislocation rate after MPFL surgery without TP between patients with type A or B TD (2.7%) and in patients with type C or D TD (18.6%). In the analysis for every single type of TD, the following results were obtained: redislocation rate of 1.8% in type A, 3.2% in type B, 11.9% in type C, and 7.4% in type D. A statistically significant difference in the complication rate, favouring MPFL surgery without TP, was documented. Both surgical approaches provided a significant improvement with no difference in Kujala and IKDC scores. These results were confirmed when data were analyzed including only patients with type B, C, or D TD, or without additional bone remodelling procedures.
conclusionIsolated MPFL is as effective as combined TP and MPFL surgery in preventing redislocation and improving clinical and functional outcomes in patients with recurrent LPD and knees affected by moderate TD. However, in case of severe TD, the redislocation rate is lower when TP is performed in combination with MPFL surgery, although with comparable clinical outcomes and a higher risk of post-operative range of motion (ROM) limitation. LEVEL OF EVIDENCE: Systematic review and meta-analysis, Level IV.
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