Perry, O’Brien, and Hodgson operation for genu recurvatum. A, Origin of medial head of gastrocnemius has been released, leaving proximal strap. Broad flap of posterior capsule is released for future advancement. B, Semitendinosus and gracilis tendons are divided at musculotendinous junctions. Each is passed through tunnel in tibia, then across exterior of joint, and then through tunnel in femur. Flap of posterior capsule is advanced and sutured snugly with knee flexed 20 degrees. C, Cross straps are made with biceps femoris and iliotibial band. SEE TECHNIQUE 34.17.