Fig. 1.

Radiographic and computed tomographic (CT) scanning evaluation of osteolysis of both hips of a 43-year-old man with osteonecrosis of both hips. a An anteroposterior radiograph of both hips 10 years after surgery demonstrated that Duraloc optional cementless cups are fixed in a satisfactory position by bone ingrowth. There in no radiolucent line or osteolysis around the acetabular or femoral components. Grade 3 bone loss is observed in the calcar region of both hips. b CT scanning of both hips taken 10 years after surgery reveals no evidence of osteolysis around the acetabular or femoral components