Abstract: A prosthetic humeral head component (60) comprising: a convex external head surface (62); an internal cavity (64) formed opposite to the head surface (62); and a plurality of fixation elements (70) protruding from said cavity (64) oppositely to said head surface (62) for location into a peripheral portion (17b) of an epiphyseal plate (17) of the humerus (14) to secure the component (60) to the humerus (14), wherein the component is formed as a single, unitary piece. The fixation elements may comprise pegs (70), fins (1080), or keels (2090), or combinations thereof.

Abstract: A prosthetic glenoid component (10) comprising a concave external bearing surface (12), a glenoid-contacting surface (14) opposite to the bearing surface, and a plurality of fixation elements (16) protruding from said glenoid-contacting surface (14) oppositely to said bearing surface (12) for location into a peripheral portion (104b) of a glenoid cavity (104) to secure the component to the scapula (102), wherein a central portion (15) of the glenoid-contacting surface (14) is free of fixation elements so as to preserve the integrity of the glenoid vault.