Arthroplasty is a procedure to restore the function of a joint. A joint can be restored by resurfacing the bones. An artificial joint may be used, depending on the requirement of the surgery. Unlike any other surgical procedure, complications can happen. Some possible complications may include are Bleeding, Infection, Blood clots in the legs or lungs and Loosening of prosthetic parts Nerves or blood vessels in the area of surgery may be injured. This results in weakness or numbness. The joint pain may not be relieved by the surgery and complete function may not return.