Reverse Total Shoulder Replacement

Understanding the shoulder joint

The shoulder joint is where the ball-shaped part of the upper arm bone (humerus) meets the cup-shaped socket of the shoulder blade (scapula). A group of muscles and tendons hold the joint together. These muscles and tendons are called the rotator cuff. The muscles let you move your arm and shoulder.

Why reverse total shoulder replacement is done

The surgery may be needed if you have a complete tear of your rotator cuff. The tear may cause long-term problems with your shoulder joint. This is called cuff tear arthropathy. You may need reverse total shoulder replacement surgery if you have any of these:

• A complete tear in your rotator cuff

• Joint problems from the cuff tear (cuff tear arthropathy)

• Previous total shoulder replacement surgery that didn’t relieve symptoms

• Severe pain and trouble moving your shoulder

• No relief with treatments, such as rest, medicines, cortisone injections, or physical therapy

How reverse total shoulder replacement is done

The surgery is the opposite (reverse) of standard total shoulder replacement surgery:

• In the standard surgery, the ball of the humerus is replaced with an artificial ball. The socket of the scapula is replaced with an artificial socket. The new joint still uses the rotator cuff muscles to move the arm and shoulder.

• With the reverse surgery, the ball of the humerus is replaced with an artificial socket. The socket of the scapula is replaced with an artificial ball. Since the rotator cuff muscles are damaged, another muscle (deltoid) moves the arm and shoulder.

Risks of reverse total shoulder replacement

Every surgery has risks. Risks for this surgery include:

• Infection

• Blood loss

• Damage to nerves that may make it hard to move your arm

• Damage to the humerus or scapula

• Artificial joint moving out of position (dislocation)

• Stiffness, pain, and limited function

• Problems with anesthesia

Some risks may be higher if you have had shoulder surgery in the past. Your risks may vary depending on your shoulder problem and your overall health. Talk with your healthcare provider about which risks apply most to you.