Many patients undergo artificial joint replacement surgery for advanced joint disease for a variety of reasons. So far, artificial hip and knee joint replacements have been proven to be effective worldwide, especially hip replacements, which have been successfully used for more than 30 years after the initial replacement. This type of surgery has been performed in our country for 20 – 30 years, and we have accumulated a lot of successful experience in this area. Many patients who need surgery do not receive it in a timely manner for a variety of reasons, such as concerns about surgery and cost. Many patients and families ask the question, “How many years will the artificial joint last? This question cannot be answered simply, as it is related to the following factors. The quality of the artificial joint varies depending on the material, design and composition of the friction surface, but once assembled in the human body, the key to timely stability and proper functioning is the quality of the surgery. The quality of surgery depends on the extent of the condition, the surgeon’s understanding and proper application of joint replacement techniques, and the prevention of various complications. An important factor affecting the wear rate of artificial joints is how to reduce unnecessary wear. After years of use, artificial joints can produce wear particles that can induce local and systemic reactions in body tissues. This reaction can further cause osteolytic changes in the bone surrounding the joint. If the osteolytic reaction around the prosthesis develops to a certain extent it can have an adverse effect on the stability of the joint and eventually lead to loosening of the prosthesis. Therefore, it is important to reduce the wear and tear of the joint. The purpose of surgery is to eliminate pain and improve the quality of life, as long as the postoperative reasonable use, generally will not affect the normal use of the joint years. Generally speaking, there is no problem with normal use for more than 15 – 20 years. Strenuous exercise and injury should be avoided in life, which will certainly extend the use time, and 25 years is not impossible. The quality of the artificial joint itself is also an important factor that affects the life of the joint. At present, the surface treatment technology of the biologically fixed joint has been significantly improved, and as long as the surgical installation technology is in place, the bone will grow in smoothly and reach biological stability within 2-3 months after surgery. The immediate and long-term stability of the prosthesis has improved significantly due to the 3rd-4th generation of surgical techniques for bone cement fixation. The composition of the joint friction surface has also improved significantly, such as metal-metal pairing, ceramic-ceramic pairing, and metal-polymer polyethylene pairing, significantly reducing friction. Theoretically, with a low wear rate of joint friction surfaces, there will be less osteolytic reaction caused by joint wear particles and less harm to joint stability. There is also a practical issue to be addressed, the ideal joint prosthesis can compensate for the technical deficiencies of the surgeon, and any good prosthesis to achieve excellent results can only be achieved through the superb technical operation of the surgeon. The technology of artificial joint surgery and the quality of joint prostheses has significantly improved to a whole new level in the last 10 years. Because there are still many unknowns about biomaterials and the body’s biological response, and because many primary diseases, such as rheumatoid arthritis, cannot be cured by a single surgery, and because osteoporosis, for example, can affect the long-term stability of the prosthesis, the technology is not yet able to serve patients for life at any age. Artificial joints can be surgically revised after loosening, and they can still serve patients after the revision. It is believed that with the development of science, it is only a matter of time before the era of “zero” wear and tear of artificial joints will arrive.