A total shoulder replacement is a surgery that replaces the bones of the shoulder joint with artificial parts.
The shoulder is made of a ball and socket joint, where the round end of the arm connects into the shoulder opening, according to the NIH.
During the replacement, the round end of the arm bone will be replaced with an artificial piece with a round metal end. That end will fit into a socket part that has been replaced by a smooth plastic shell. The shell piece is secured with special cement, according to the NIH.
Total shoulder replacement arthroplasty is a well-established surgery for restoring comfort and function to the arthritic shoulder. In this procedure the arthritic ball is replaced by a smooth met- al ball fixed to the arm bone (humerus) by a stem that fits within it.
Total shoulder arthroplasty, or TSA, is a procedure used to replace the diseased or damaged ball and socket joint of the shoulder with a prosthesis made of polyethylene and metal components. The “ball” is the proximal head of the humerus and the “socket” refers to the concave depression of the scapula referred to as the glenoid