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Trochleaplasty–Functional and Subjective Results: A Follow–Up Study

Abstract

Study background: We investigated the clinical, radiographic and subjective outcomes of 39 patients (42 knees) treated with trochleaplasty for recurrent dislocation of the patella at our institution. Methods: We retrospectively reviewed our operative experience of this technique both, clinically and radiographically. All patients had trochlea dysplasia of at least Dejour type B. The mean follow–up was 48.9 months (range 12–109). Validated questionnaires were used (SF–36, Tegner–Score, Lysholm–Score). Results: There was no postoperative recurrence of patellar dislocation. There were no wound problems, infections or thromboembolic complications. One patient required an evacuation of haematoma. The average of Tegner's activity Score was 5 points (55% reached 5 or more points). Mean Lysholm- Score was 81.3 points, 57, 1% (24/42) had >/= 84 points (good results), 40, 5% (17/42) >/= 90 points (excellent results). Conclusion: Trochleaplasty is a technically demanding surgical procedure yet it can reliably address recurrent patellar dislocations and promote excellent function and quality of life. Future studies will elucidate whether trochleaplasty will check or prevent patellofemoral osteoarthritis in the long term.

Bering J MD, Wyatt MC MD, Lütolf J, Rosenkranz J MD, Sossai R MD , Bereiter H MD and Müller U MD

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