Symptoms for Shoulder Replacement
Treatment of Chronic Shoulder Pain
Shoulder joint components may be held in place with cement. Or they may be made with material that allows new bone to grow into the joint component over time to hold it in place without cement.
The top end of the upper arm bone (humerus) is shaped like a ball. Muscles and ligaments hold this ball against the cup-shaped part of the shoulder bone (scapula). Shoulder replacement surgery involves either replacing or capping the ends of a damaged humerus with an artificial surface made of metal and/or plastic. If the cup-shaped surface of the scapula is also damaged, doctors smooth it and then cap it with a similar artificial surface.
Shoulder replacement surgery was first performed in the United States in the 1950s to treat severe shoulder fractures. Over the years, shoulder joint replacement has come to be used for many other painful conditions of the shoulder, such as different forms of arthritis.
The most common shoulder replacement procedures are:
Total Shoulder Replacement
In a total shoulder replacement, the shoulder socket is fitted with a plastic mount and a metal ball replaces the top of the arm bone.
Partial Shoulder Replacement
In a partial shoulder replacement, only the ball portion of the shoulder joint is replaced.
“Reverse” Total Shoulder Replacement
The same wear and tear that can bring about arthritis of the joint is often responsible for degeneration of the muscle and tendons that form the rotator cuff. An intact rotator cuff is critical to shoulder comfort and mobility. A “reverse” total shoulder replacement uses muscle outside the rotator cuff group to do the job of the rotator cuff.
In this procedure, the socket portion of the implant is attached directly to the top of the arm bone. This allows the deltoid muscle, which overlays the shoulder joint, to function more like the rotator cuff muscles.