Abstract: A articulating hemiarthroplasty prosthesis (10) for implantation into the human anatomy (14) is provided. The prosthesis includes a cup (12) for engagement with the human anatomy (14). The cup (12) has a portion (64) having a reduced thickness (T2) to permit at least a portion of the cup (12) to be mechanically separated from the cup (12) to form an opening (66) through the cup (12).

Abstract: A biodegradable screw is used to secure a prosthesis component to bone, the screw disclosed having a head portion, a threaded portion, and a bore extending along the screw's longitudinal axis through the head portion and through at least a substantial length of the threaded portion.

Abstract: A prosthetic joint system includes a body having at least one aperture into which an elongate sleeve component is engageable. A screw for securing the body to bone is insertable into the bone via a bore in the sleeve. The bore has a length that is sufficient to accommodate movement of the screw as the prosthesis subsides over time. More particularly, the sleeve allows the screw head to move longitudinally such that the screw is prevented from damaging an inner member of the prosthesis system that provides an articulation surface for a corresponding prosthetic joint component. In one embodiment, a prosthesis system includes an acetabular cup for a prosthetic hip joint.