Humeral component of a shoulder prosthesis

摘要

A humeral component of a shoulder prosthesis encloses a stem module which has a shank and an upper shank portion with a stem support surface. A joint adapter is adapted to hold either a liner or a spherical cap. The joint adapter has an adapter support surface which interfaces with the stem support surface. Further, the stem support surface and the adapter support surface have corresponding radial arc shaped sections which allow positioning of the joint adapter against the stem module at different inclination angles. For fastening the joint adapter to the stem module, a bolt or screw is provided.

主权项

1. A humeral component of a shoulder prosthesis comprising:
a stem module comprising a shank and an upper shank portion with a stem support surface, and a joint adapter adapted to hold either a liner or a spherical cap, the joint adapter having an adapter support surface which interfaces with the stem support surface, the joint adapter having a plurality of holes for inserting a fastening device dependent on an inclination angle corresponding to the inclination angle of a patient's humeral joint; wherein the stem support surface and the adapter support surface have corresponding approximately radial arc shaped sections which comprise segments of a cylinder shell surface with a radius and a center axis for positioning of the joint adapter against the stem module at different inclination angles between the longitudinal axis of the stem module and the center axis of the joint adapter; and wherein the joint adapter is fastened to the stem module.