Classification of XXXX as predictor of clinical outcome after trochleoplasty.

@entity1 @entity10460 @entity39 @entity158 @entity6125 @entity1141
PURPOSE: Sulcus-deepening trochleoplasty restores the trochlear groove in @entity1 with patellofemoral instability and underlying @entity6125 . There are types of @entity1141 both with (B and D) and without (A and C) a supratrochlear spur. The aim of this study was to identify influencing factors for the clinical outcome following trochleoplasty. METHODS: Forty-four knees in 38 @entity1 who underwent trochleoplasty for instability (type A in 9, B in 15, C in 9 and D in 11 knees) were assessed clinically with the Kujala score and radiologically with radiographs and MRI. The median follow-up was 4 (2-7.8) years. RESULTS: At follow-up, the median Kujala score had improved from 68 (29-84) to 90 (42-100) points (P  <  0.001). Instability (P  <  0.001) and @entity158 (P  =  0.027) decreased significantly, but in 3 knees, @entity158 was worse postoperatively. Twenty-seven knees were ranked as excellent, 10 as good, 2 as fair and 5 as poor. Overall, @entity1141 types B and D benefited more from surgery than types A and C. The postoperative MRI revealed no @entity39 , but deterioration of cartilage on the lateral trochlear facet was identified. CONCLUSION: Trochleoplasty is a useful and reliable surgical technique to improve patellofemoral instability in @entity1 with a @entity10460 . While improved stability is predictable, @entity158 is less predictable and may even increase following surgery. The overall results were directly dependent on the type of the @entity1141 , with a significantly better clinical outcome in type B and D. The clinical relevance of this study is that severe @entity1141 can successfully be treated with trochleoplasty. LEVEL OF EVIDENCE: III.
