Technique for recurrent dislocation of peroneal tendon. A, With tendons retracted, cortical osteoperiosteal flap is raised along posterolateral aspect of distal fibula, leaving posteromedial border intact as hinge. B, Flap is hinged posteriorly, and cancellous bone is removed from posterior aspect of fibula to deepen groove. C, Periosteal flap is swung posteriorly over tendons in groove. SEE TECHNIQUE 48.37.