During the elbow replacement surgery, the surgeon removes damaged tissue and parts of the two arm bones, the humerus and the ulna meeting at the elbow joint. Once the tissue and the bone is removed, the elbow joint is replaced with an artificial joint called Prosthesis. The prosthesis consists of two implants that are attached to the insides of the ulna and the humerus. The Prosthesis is joined using a metal and plastic hinge. There are various types of implants available that fit joints of varying sizes. Elbow replacement is relatively uncommon but it is similar to hip and knee replacement