A total knee replacement is also known as a total knee arthroplasty. The surgery involves opening the knee joint through an incision on the front of the knee. The damaged surfaces of the joint are surgically removed. The joint is then resurfaced with metal and plastic parts. The parts are typically cemented into position. All three bones of the knee are resurfaced—the femur, tibia and patella. This surgery may be performed with a surgical robot or computer navigation system. You are allowed to walk immediately after surgery. The surgery can be performed as an outpatient, or it may require a very short hospital stay.