The humeral head is the “ball” part of the socket and ball joint; in case of a severe injury, the humeral head can be replaced by an artificial head and the glenoid (socket part) by an artificial socket in order to regain mobility in the shoulder joint and to guarantee healing (Walch and Boileau, 2009).
Main aim is to reconstruct the tuberosita and rotator cuff around the prosthesis;
Although there are different protocols how to proceed post surgery, for the first 3 weeks active movement might be forbidden (passive movement by a physiotherapist is advised); active movements: elbow, wrist, fingers, scapula setting and pendular exercises out of the sling are beneficial. After that period weaning off the sling and regaining of range of movement is the near and future goal.
Walch G. and Boileau P., Shoulder Arthroplasty, Springer Verlag, Berlin, Germany, p: 13