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Trochleoplasty in major trochlear dysplasia: current concepts.
Philippe Beaufils1, Mathieu Thaunat, Nicolas Pujol
1Orthopaedic Surgery Department, Centre Hospitalier de Versailles, Versailles, France. pbeaufils@ch-versailles.fr.
Summary
Trochleoplasty surgery addresses severe trochlear dysplasia with a prominence greater than 5 mm. This procedure shows encouraging results in preventing re-dislocation and improving outcomes, despite potential post-operative stiffness.
Area of Science:
- Orthopedic surgery
- Knee joint biomechanics
Background:
- Persistent pain and instability in trochlear dysplasia can significantly impact quality of life.
- Trochlear dysplasia is characterized by both flatness and prominence of the trochlea.
- The surgical threshold for prominence has not been definitively established, with 5 mm often cited as a guideline.
Purpose of the Study:
- To evaluate trochleoplasty as a surgical solution for symptomatic trochlear dysplasia.
- To discuss the indications, outcomes, and potential complications of trochleoplasty.
- To introduce a modified recession wedge trochleoplasty technique.
Main Methods:
- Review of published results for trochleoplasty in managing trochlear dysplasia.
- Discussion of indications for primary and salvage trochleoplasty.
- Description of the recession wedge trochleoplasty technique, often combined with other extensor realignment procedures.
Main Results:
- Trochleoplasty demonstrates encouraging outcomes in preventing re-dislocation and improving patient satisfaction and radiological results.
- Stabilization is achieved in most cases, though mild anterior knee pain may persist.
- Post-operative stiffness is the most common complication, manageable with interventions like manipulation under anesthesia or arthrolysis.
Conclusions:
- Trochleoplasty is a viable option for major trochlear dysplasia (>5 mm prominence) and as a salvage procedure for failed prior surgeries.
- The recession wedge technique offers a potentially simpler approach to trochleoplasty.
- This procedure should be considered in selected patients after thorough discussion, often as part of a comprehensive extensor apparatus realignment strategy.
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