Deepening Trochleoplasty in Patellar Dislocation: Thick-Flap Technique

Deepening trochleoplasty is a technically demanding operation that is rarely required for most of the patients presenting with recurrent dislocation of the patella. However, in the presence of significant trochlear dysplasia, standard extensor mechanism realignment techniques can fail. A deepening trochleoplasty using a thick osteochondral flap technique is a logical solution for severe dysplasia and does not rely on the presence of normal articular cartilage in the trochlea. Satisfactory outcomes, including returning to sports for those who actively participate is usual. Theoretical complications such as chondrolysis and progression of patellofemoral osteoarthritis have not been found. This article describes the step-by-step operative technique with illustrations.