Shoulder replacement is surgery to replace the bones of the shoulder joint with artificial joint parts.

You may receive general anesthesia before this surgery. This means you will be unconscious and unable to feel pain. Or, you may have regional anesthesia. Your arm and shoulder area will be numbed so that you do not feel any pain in this area. If you receive regional anesthesia, you will also be given medicine to help you relax during the operation.

The shoulder is a ball and socket joint. The round end of one bone fits into a cavity, or socket, at the end of another bone. This type of joint allows you to move your arm in most directions.

For total shoulder replacement, the round end of your arm bone will be replaced with an artificial stem that has a rounded metal head. The socket part of your shoulder joint will be replaced with a smooth plastic shell (lining) that will be held in place with a special cement. If only 1 of these 2 bones needs to be replaced, the surgery is called a partial shoulder replacement.

For shoulder joint replacement, your surgeon will make an incision (cut) over your shoulder joint to open up the area. Then your surgeon will:

• Remove the head (top) of your upper arm bone (humerus)
• Cement the new metal head and stem into place
• Smooth the surface of the old socket and cement the new shell in place
• Close your incision with staples or sutures
• Place a dressing (bandage) over your wound

Your surgeon may place a drain in this area to carry out fluid that may build up in the joint. The drain will be removed when you no longer need it.

This surgery usually takes 1 to 3 hours.

Shoulder replacement surgery is usually done when the joint is badly damaged and there is pain or loss of motion. Causes of damage include:

• Osteoarthritis
• Poor result from a former shoulder surgery
• Rheumatoid arthritis
• Badly broken bone in the arm near the shoulder
• Badly damaged or torn tissues in the shoulder
• Tumor in or around the shoulder