Metal back prosthetic glenoid component with cemented pegs and hollow metal cage screw
A prosthetic glenoid component for attachment to a glenoid surface of a scapula to replace a natural socket of a shoulder and to provide a bearing surface for a head portion of an arm bone or humerus. The glenoid component has a metal back with integrally formed attachment legs which are cemented into corresponding holes formed in the glenoid surface, and also has an opening for receiving a hollow metal cage which is screwed into the glenoid surface.
1. A method of attaching a glenoid prosthesis, comprising:
resecting a portion of the glenoid cavity on the surface of a scapula to provide a resected scapula surface;
drilling at least two holes substantially perpendicular to the resected scapula surface;
filling the holes with cement;
providing a metallic glenoid prosthesis comprising at least two pegs and a central aperture;
inserting the at least two pegs of the glenoid prosthesis in the drilled holes filled with cement, the pegs each having a plurality of circumferential grooves disposed around the full circumference of the pegs; and
advancing a hollow metal cage screw with fenestrations and circumferential threads through the central aperture of the glenoid prosthesis and into a hole in the scapula to affix the glenoid prosthesis to the resected scapula surface.
2. The method of claim 1 , wherein the holes are formed by drilling.
3. The method of claim 1 , further comprising the step of forming a cylindrical hole in the scapula for receiving the hollow metal cage screw.
4. The method of claim 3 , wherein the cylindrical hole is formed with a coring reamer.