Fig. 4A–C.

(A) A postoperative radiograph shows a press-fit, grit-blasted tripod dual-mobility cup implanted in a 65-year-old active woman during THA for advanced primary osteoarthritis. (B) Seven years later, the patient reported excellent hip function and radiographic control looked optimal. (C) In the eighth postoperative year, hip function deteriorated slightly, and the cup migrated medially. The upper fixation screw broke, while bone density at the acetabular roof increased. The patient has declined reoperation.