Total knee surface replacement” is what is commonly referred to as “total knee arthroplasty”. The surface replacement procedure involves the removal of the diseased femoral, tibial and patellar articular surfaces and their replacement with metal articular surfaces separated by a polymer polyethylene pad. The metal materials used are t-molybdenum and titanium alloys, which have good histocompatibility with human tissue and no rejection; at the same time, the modern artificial knee joint is designed to be more compatible with human biomechanics. You can usually get down and start functional exercises a few days after surgery and be discharged from the hospital about a week after surgery. With a successful knee replacement, the patient’s painful symptoms disappear and he or she is able to resume his or her normal walking, up and down stairs functions and appropriate physical exercise for a life span of more than 20 years.