Shoulder dislocation prevention surgery, illustration. This procedure is an operation to prevent recurrence of shoulder dislocations. It involves removing and reattaching parts of the bones and muscles tendons in the glenoid cavity (the shoulder socket). Here, seen in frontal view, part of the coracoid process of the scapula (shoulder blade) has been removed (shown across top) and fixed to the front of the shoulder socket (shown across bottom), with the final set-up shown from the side at bottom right.