A, Medial patellofemoral ligament detached from medial femoral epicondyle after acute patellar dislocation. B, Medial patellofemoral ligament with firm edge of vastus medialis obliquus muscle reinserted to periosteum of medial femoral epicondyle, and adductor magnus tendon harvested. C, Adductor magnus tendon fixed near medial border of patella, and retinaculum duplicated.