Acetabular cup prosthesis assembly

摘要: An acetabular cup prosthesis assembly has an outer shell, a bearing insert, locking collar, and ring. The insert is retained within the which generally smooth, hemispherical surface. adapted to receive femoral head of hip prosthesis. opening first diameter smaller than head, elastically expandable second allow for passage through opening. collar movable from disengaged position engaged adjacent prevent expanding so as lock in insert. ring disposed circumferential groove inner surface serves maintain may be assembled into sub-assembly separately packed sterilized use by orthopedic surgeon. form two-component system easily manipulated during implantation procedure.