Anchored femoral dome

Abstract

A prosthetic implant for the head of a femur comprises a substantially hemispherical-shaped dome formed with a hole, and having a relatively flat surface, for abutting a sculpted femoral head having a channel prepared through the bone. A compression bolt is insertable through the hole in the dome and through the prepared channel, with the bolt having a first end engageable with the dome and a second end engageable with a nut and washer to hold the dome firmly in position on the femoral head. The hole in the dome is tapered, and the first end of the compression bolt is correspondingly tapered, for fixed engagement of the bolt with the dome. The dome may include anchoring spikes extending from the bottom surface for embedding the dome in the femoral head to secure the dome on the femoral head. In addition, the bottom surface of the dome is textured to prevent slipping, and skirts may also be provided to form a partial ball-shaped dome. A method is also disclosed for attaching the prosthetic implant to the head of the femur.

Dependencies are inferred from the claim text.