Hernigou et al. medial opening wedge tibial osteotomy. A, Osteotomy proximal to tibial tubercle begins 3.5 cm distal to medial joint line and is directed toward proximal tip of fibula, leaving lateral part of cortex intact. B, Osteotomy is pried open, and wedge-shaped bicortical iliac bone grafts are inserted. Osteotomy is fixed with plate and screws.