Resorption of femoral head autograft. A, After total hip arthroplasty with femoral head autograft for superior and posterior segment deficits. Graft is united at 6 months. Portion of graft protrudes beyond edge of component. B, Two years after surgery, unstressed lateral portion of graft has resorbed. Note medial migration of washers. Function is excellent, component shows no migration, and there is no resorption of graft that supports socket.