Shoulder Replacement

Similar to other joint replacement procedures, shoulder replacement surgery is generally done to address persistent pain that is not controlled by non-surgical therapy. Less commonly, poor shoulder motion may also be a reason for replacement surgery.

The shoulder is a ball-and-socket joint, with the top of the arm bone (humeral head) fitting into a socket known as the glenoid. Muscles and tendons, such as the rotator cuff, help hold the joint in place. Surgery involves replacing the humeral head and the glenoid with artificial components. The humeral head replacement is generally made from a metal alloy, while the glenoid component is made from polyethylene plastic. The new components may be anchored by cement or press-fit into place so that the bone grows in around them. Conditions for Shoulder Replacement Surgery: Shoulder replacement surgery may be required in following conditions: Osteoarthritis (degenerative joint disease) Rheumatoid arthritis Post-traumatic arthritis Rotator cuff tear arthropathy (a combination of severe arthritis and a massive non-reparable rotator cuff tendon tear) Avascular necrosis (osteonecrosis) Failed previous shoulder replacement surgery Shoulder Replacement Surgery Preparation: Before Shoulder replacement surgery surgeon provides information on the state of the joint space, the position of the humeral head in relation to the glenoid, the presence of bony defects or deformity, and the quality of the bone. If glenoid wear is observed, a computed tomography (CT) scan is usually performed to evaluate the degree of bone loss. The treating physician usually performs a general medical evaluation several weeks before shoulder joint replacement surgery to assess the patient's general health condition and risk for anesthesia. The results of this examination are forwarded to the orthopedic surgeon, along with a surgical clearance. Patients are advised to eat properly and take a daily iron supplement some weeks before surgery. Several types of tests are usually required, including blood tests, a cardiogram, a urine sample, and a chest x ray. Patients may be required to stop taking certain medications until surgery is over.