1.What is artificial joint? Liu Pengcheng, Department of Orthopedics, Xinjiang Uygur Autonomous Region Hospital of Traditional Chinese Medicine, said that artificial joints are artificial organs designed to replace diseased joints in human body to save the function of joints, which are friendly with human body and generally have no adverse reactions. 2. What is artificial joint replacement? Artificial joint replacement is a type of surgery to use artificial prosthesis to replace diseased joints in human body to alleviate pain, correct deformity, and restore and improve the function of joint movements. 3. Who needs to do artificial joint replacement surgery terminal joint destruction, other treatment methods are ineffective in terms of patients, need to do artificial joint replacement, such as knee osteoarthritis, femoral head necrosis, endogenous rheumatoid arthritis and other advanced diseases. One case of knee arthroplasty, the cartilage surface was severely worn during the operation.