In the past, total hip replacements often bled a lot and required blood transfusions due to the long operation time (sometimes more than 3 hours) and large incisions, as well as slow recovery and high risks. In contrast, Professor Yin Feng of the Department of Orthopedics at Shanghai Oriental Hospital, a nationally renowned expert in joint surgery, carries out hip replacements that enable patients to bleed less (basically no blood transfusion), have a short operation time (only about 45 minutes), and recover quickly. After more than 30 years of clinical practice, the therapeutic effect of artificial hip replacement has been fully affirmed and has developed into a reliable treatment. The main purpose of arthroplasty is to relieve joint pain, correct deformities, and restore and improve joint motion. Osteoarthritis is the first indication for arthroplasty, followed by aseptic necrosis of the bone (e.g., femoral head necrosis), certain hip fractures (e.g., femoral neck fractures), rheumatoid arthritis, traumatic arthritis, benign and malignant bone tumors, and ankylosing spondylitis. In short, any disease with x-ray signs of joint destruction, with moderate to severe persistent joint pain and dysfunction, and which cannot be relieved by various other non-surgical treatments, has indications for artificial joint replacement. In patients with bilateral femoral head necrosis, bilateral hip or bilateral knee osteoarthritis, bilateral hip or bilateral knee arthroplasty is sometimes required simultaneously or sequentially. In patients with severe rheumatoid arthritis and ankylosing spondylitis, multiple joint replacement is often required due to pain, stiffness and dysfunction of multiple joints. In the past, 60-75 years of age was considered the most appropriate age range for total hip and total knee arthroplasty. In the last decade, the indications have been expanded to include older and younger patients. However, because of the high activity level of young patients, the long postoperative life span and the limited life span of artificial joints, young patients may have to face the possibility of a second or even a third joint revision surgery after surgery. Artificial joints started in the 1940s abroad and were gradually carried out in China after the 1960s. At present, artificial hip and knee joint replacement are considered to be the treatment methods with very positive results in artificial joint replacement, and other artificial joints such as artificial elbow joint, artificial shoulder joint and artificial ankle joint replacement have been carried out in the orthopedic department of Oriental Hospital, which have brought good news to patients with various joint diseases. Artificial hip joint replacement is a kind of prosthesis similar to human bone joints made of metal materials with good biocompatibility and mechanical properties, which is used to surgically replace the joint surface damaged by disease or injury.