[Complications after total hip endoprosthesis: fracture of the femur and simultaneous fracture of the cement mount of the acetabulum (author's transl)].

Report about a rare complication after total hip endoprosthesis with a simultaneous rupture of the cement mount in the acetabulum (due to a trauma) and a fracture of the femur. The x-rays and the intraoperative findings were interpreted erroneously; therefore the diagnosis was delayed. A second operation was needed to reimplant the acetabulum. During the same operation a wrong position of the prosthesis (outward rotation) had to be corrected.