Arthroplasty is a surgical procedure to restore the integrity and function of a joint. A joint can be restored by resurfacing the bones. An artificial joint (called prosthesis) may also be used. Various types of arthritis may affect the joints. Osteoarthritis, or degenerative joint disease, is a loss of the cartilage or cushion in a joint, and is the most common reason for Arthroplasty. Joints are formed where bones meet. Most joints are mobile, allowing the bones to move. Joints consist of elements like Cartilage, Synovial membrane, Ligament, Tendon, Bursa and Meniscus. People who have arthroplasty generally have substantial improvement in their joint pain, ability to perform activities, and quality of life, so these are important reasons for the procedure as well. Most joint surgery involves the hip and knee, with surgery on the ankle, elbow, shoulder, and fingers being performed less often. There may be other reasons for your doctor to recommend arthroplasty. Please see hip replacement and knee replacement surgical procedures for more specific information.