Fig. 1A–D.

(A) A preoperative radiograph shows osteoarthritis secondary to septic sequelae of a femoral shaft fracture in a 24-year-old woman. The indication for THA was retained. (B) A postoperative radiograph shows a bipolar cementless THA with a hard-on-soft bearing surface. (C) A radiograph taken at the 4-year followup shows, despite an asymptomatic hip, there is considerable polyethylene liner wear without acetabular osteolysis, which led to revision. (D) Acetabular revision was performed with a new cup (polyethylene insert) fixed with five screws without bone graft.