An implant assembly for re-establishing a glenohumeral joint between scapula and humerus bones. A substantially spherical shaped element is adapted to being mounted a reconditioned glenoid cavity defined in the scapula and exhibits a second convex exterior surface projecting from the bone surface. A receiver component has a base with a first convex bone contacting surface adapted to being mounted to a reconditioned humeral head associated with the humerus, the receiver component exhibiting a second convex exterior surface projecting away from the bone surface and exposing a concave profile exhibiting only a rim edge therebetween at an outer exposed seating end of said second convex surface for supporting the components in inter-articulating fashion.
