A shoulder replacement is a procedure that tries to eliminate the source of pain and dysfunction by replacing damaged parts of the shoulder joint with artificial components called prostheses. The most common reasons for a shoulder replacement surgery are osteoarthritis, rotator cuff tear arthropathy, avascular necrosis or rheumatoid arthritis. A shoulder replacement is a procedure that tries to eliminate the source of pain and dysfunction by replacing damaged parts of the shoulder joint with artificial components called prostheses. The most common reasons for a shoulder replacement surgery are osteoarthritis, rotator cuff tear arthropathy, avascular necrosis or rheumatoid arthritis. A shoulder replacement is a procedure that tries to eliminate the source of pain and dysfunction by replacing damaged parts of the shoulder joint with artificial components called prostheses. The most common reasons for a shoulder replacement surgery are osteoarthritis, rotator cuff tear arthropathy, avascular necrosis or rheumatoid arthritis.