Patent ID: 6953478

Claim:
A shoulder prosthesis assembly, comprising: a metaglenoid element comprising a plate that includes a central tubular adapter having an axial bore that is threaded over a fraction of a length of said axial bore, said tubular adapter coacts with at least one anchoring member to anchor said metaglenoid element in a glenoid cavity; and a glenoid sphere adapted to be fitted over said metaglenoid element and having an axial screw that is capable of being screwed into said tubular adapter, said glenoid sphere having a joint surface for co-operating with a cup of an associated humeral prosthesis, wherein said axial screw includes cylindrical means for guiding said glenoid sphere with respect to said metaglenoid element, said means for guiding cooperates with a smooth cylindrical zone arranged in an inlet of said axial bore of said tubular adapter and allows axial insertion of said axial screw into said axial bore of said tubular adapter without damaging threads of said axial bore.