1.1 This specification covers shoulder prostheses for total or hemiarthroplasty used to provide functioning articulation by employing glenoid and humeral components. 1.2 Devices for custom applications are not covered b This specification covers shoulder prostheses for total or hemiarthroplasty used to provide functioning articulation by employing glenoid and humeral components. The prostheses may be constrained, partially constrained, or unconstrained. Modular prost