Guide to Total Shoulder Replacement

Physical Therapist’s Guide to Total Shoulder Replacement (Arthroplasty)

Total shoulder arthroplasty (TSA), often called a total shoulder replacement, is a surgical procedure in which part or all of the shoulder joint is replaced. It is estimated that 53,000 people in the United States have shoulder replacement surgery each year, according to the Agency for Healthcare Research and Quality. That number compares to the more than 900,000 Americans a year who have knee and hip replacement surgery. Physical therapists can help patients who undergo a TSA return to their previous levels of physical activity, including fitness training, or participation in sports like swimming or golf.

What is Total Shoulder Arthroplasty?

Total shoulder arthroplasty is a surgical procedure in which part or all of the shoulder joint is replaced. It is performed on the shoulder when medical interventions, such as other conservative surgeries, medication, and physical therapy no longer provide pain relief. The decision to have a TSA is made following consultation with your orthopedic surgeon and your physical therapist.

A shoulder replacement may be needed if you have any of the following conditions affecting the shoulder, causing severe shoulder pain and limiting your ability to use the affected shoulder:

• Osteoarthritis

• Rheumatoid arthritis

• Severe shoulder fracture

• Rotator cuff disease (a muscle tear or soft-tissue breakdown of the rotator cuff)

• Osteonecrosis of the shoulder (death of the bone tissue at the head of the humerus)

A TSA involves removing the ends of the bone at the shoulder joint, and replacing them with artificial parts. The upper part of the arm bone (humerus) is shaped like a ball; it is called the “head” of the humerus. During a TSA, the head of the humerus is replaced by a metal ball. The socket that the head of the humerus sits in is called the glenoid fossa. During a TSA, the socket is replaced by a plastic cup.

Due to various physical limitations, your orthopedic surgeon may decide that you are a candidate for another form of TSA, such as:

• Shoulder hemiarthroplasty, where only the head of the humerus is replaced with a metal ball.

• Reverse TSA, where the metal ball and plastic socket are reversed. This procedure is recommended when the rotator cuff muscles of the shoulder are damaged. The plastic socket is attached to the top of the humerus, and the metal ball is attached to the socket. This procedure allows another shoulder muscle, called the deltoid, to take over for the damaged rotator cuff muscles, improving functional range of motion, strength, and stability of the shoulder.

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