Humeral Head Resurfacing Total shoulder replacement typically involves inserting a metal (titanium or cobalt chromium) stem inside the humerus (upper arm bone) and resurfacing the glenoid (shoulder socket) with a plastic (polyethylene) component. While total shoulder replacement is an extremely effective treatment option for most people, not everyone is a candidate for the procedure. The alternative surgical option to total shoulder replacement is partial shoulder resurfacing.   Humeral head resurfacing utilizes a metal (cobalt chromium) cap that resurfaces the head of the humerus. This conservative procedure makes the technique less invasive than traditional shoulder replacement surgery. This technique may require a smaller incision and less bone removal, which can allow you to recover more quickly and with less pain. The implant can also help prolong or avoid the need for future total shoulder replacement. However, if you should need total shoulder replacement in the future, humeral head resurfacing allows your surgeon the ability to perform the procedure with a less-invasive approach. Complications While uncommon, complications can occur during and after surgery. Some complications include infection, blood clots, implant breakage, misalignment, and premature wear. Although implant surgery is extremely successful in most cases, some patients still experience stiffness and pain. No implant will last forever and factors such as the patient's postoperative activities and weight can affect longevity. Be sure to discuss these and other risks with your surgeon. Humeral head resurfacing is one option available to you and your surgeon. Only your orthopedic surgeon can determine if you are a candidate for this implant or if another type of implant would better suit your unique situation.