Fig. 2A–D.

(A) An AP radiograph shows prosthetic cup loosening with severe acetabular osteolysis 14 years postoperatively in a 70-year-old woman. (B) A CT-based three-dimensional (3-D) reconstruction of the patient’s acetabulum is shown. (C) An individualized custom cage with an artificial iliac wing, 3-D printed support augment, and obturator hook was constructed, and installation was simulated using the rapid-prototyping model. (D) A postoperative AP radiograph shows excellent restoration of the rotational center of the hip.