Large taper modular shoulder prosthesis

摘要

A kit for assembly of a modular joint prosthesis (10) includes at least two shank/body elements (22/20) sized for insertion into the shank of the bone and at least two head members (48) sized to replace one bearing surface of the joint. Each shank/body element (22/20) has a collar (58) that has a shallow width and a circular plan view and that is formed to overhang a resected level of the bone. The collar (58) has a male taper on its side wall (64). Each head member (48) has a first geometric axis (52) therethrough and defines a part spherical cavity (49) with a skirt (66) extending about the cavity (49). The skirt (66) provides a female taper for receiving and providing a mechanical connection with the male taper on the side wall (64) of each collar (58). A second axis extends (55) through the skirt (66). The first axis (52) and second axis (55) may be coincident or offset from one another.