Fig. 2.

A diagram illustrates the method of evaluating graft coverage. CE = angle between the vertical line of the socket center and the original lateral edge of the acetabulum (which was also the medial edge of the graft bone) immediately postoperatively; CE II = angle between the vertical line of the socket center and the lateral edge of the graft bone immediately postoperatively; CE III = angle between the vertical line of the socket center and the lateral edge of the graft bone on the last visit.