For patients who are older (usually more than 50 years old), with a large necrosis area (more than 30%), serious collapse (more than 4mm) and involvement of the lateral column of the femoral head, obvious degeneration of the articular cartilage and narrowing of the joint space, there is a higher chance of failure of hip preservation treatment, and it is not suitable for hip preservation treatment, and it is recommended to choose artificial joint replacement. In addition, some patients with primary disease that is difficult to control and requires long-term hormone therapy and significant collapse of the femoral head necrosis can also be considered for artificial joint replacement, although they are younger. For these patients, the doctor should clearly inform them that they will need to undergo joint revision surgery after several years.