Partial Head Replacement

Partial head replacement, also known as partial shoulder replacement or hemiarthroplasty, is a surgical procedure in which only the damaged head of the humerus (upper arm bone) is replaced with a prosthetic implant. This procedure is often indicated when the humeral head is severely damaged due to conditions such as arthritis, fractures, or osteonecrosis, but the socket (glenoid) of the shoulder joint remains relatively healthy. The goal of partial head replacement is to relieve pain, restore function, and improve the range of motion in the shoulder.

During the surgery, the damaged humeral head is removed and replaced with a metal or ceramic prosthesis. The new implant is designed to fit into the natural socket of the shoulder joint, allowing for smooth and pain-free movement. This procedure can be less invasive and involve a shorter recovery time compared to total shoulder replacement, making it a suitable option for certain patients.

Causes for Partial Head Replacement

• Severe Fractures: Complex fractures of the humeral head that cannot be repaired effectively through other means.
• Osteoarthritis: Degenerative joint disease affecting the humeral head while the glenoid remains relatively unaffected.
• Rheumatoid Arthritis: Autoimmune condition causing inflammation and damage to the humeral head.
• Osteonecrosis: Death of bone tissue in the humeral head due to loss of blood supply.
• Failed Previous Treatments: Ineffectiveness of conservative treatments, such as medications or physical therapy, in managing shoulder pain and dysfunction.
• Traumatic Injuries: Injuries causing significant damage to the humeral head, necessitating replacement to restore shoulder function.