How long a new joint can last after an artificial hip replacement is a great concern for patients and their families. In fact, with the widespread use of new technologies and materials, the service life of artificial hip joints has been greatly improved. For example, ceramic technology has evolved from the first generation to the fourth generation, and plastic polyethylene liners have evolved from ordinary polyethylene to cross-linked polyethylene, to the current use of highly cross-linked polyethylene, which is increasingly wear-resistant. The study found that the wear situation is less than 0.1 mm per decade. It is safe to say that with the use of new materials, the rate of prosthesis failure due to friction has become less and less. In addition, the design of artificial hip joints is becoming more and more consistent with human anatomy and physiology. For example, technology now allows the patient’s own bones to grow inside the artificial hip joint, so that the fixation between the hip joint and the bones is more secure, ensuring the longevity of the new joint. From the latest literature, as well as many registry systems, such as the Swedish registry system, the American registry system, and the British registry system, it is found that, except for factors such as infection and trauma, the excellent rate of artificial hip joints after 15-20 years of use is 90%-95%, and the excellent rate after 20-30 years is 85%-90%. In other words, after 20~30 years of artificial hip joint installation, 85~90 out of 100 patients can still continue to use it.