The service life of the artificial joint is related to many factors, such as the material of the prosthesis, the amount of movement of the patient, the brand of the artificial prosthesis, the surgeon’s surgical technique and their own conditions. The metal parts of the artificial joint were once made of stainless steel, and later cobalt alloy materials were developed, which have better corrosion resistance, wear resistance and mechanical properties. Recently, the development of titanium and titanium alloy materials, titanium materials containing not only corrosion resistance, and small specific gravity, easier to grow together with the human body of bone, is the ideal material. Metal parts of the artificial joint are generally padded with high-density polyethylene as a friction surface, and metal-to-metal or ceramic-to-ceramic friction can also be used, with metal and ceramic having better friction resistance, especially ceramic, which is less toxic. The strength and wear resistance of artificial knee joint materials have been tested hundreds of times through wear and tear, and with advances in materials science, most can meet the needs of patients for more than 10-15 years, and there are many artificial joints that have been used for more than 20 years. A successful prosthetic joint replacement allows you to live a pain-free life and meet your daily activities, but just like people wear shoes, prosthetic joints can wear out while walking. Excessive exercise and frequent impact sports can lead to excessive wear and tear on the joint, which can lead to loosening and fracture, shortening its life span, so there are limits to the amount of exercise you can do after surgery. There is no absolute difference in the service life of different brands of joints. Of course, some brands of prosthesis have been clinically used for a long time to achieve better bone growth into and stability and higher survival rate. For the surgeon’s surgical technique, the proper angle, size, and early stability of the implant are as relevant as the longevity of the prosthesis. Because of the surgical procedure and the patient’s constitution, some patients may develop postoperative infections that can affect the life of the artificial joint as well. The orthopaedic community is currently working with engineers and material scientists, among others, to continuously improve artificial joint materials, processes, and surgical techniques. For those patients who have no choice but to improve their quality of life with joint replacement and want to be healthy and pain-free, choosing a surgeon who is qualified and who you can trust will be an important guarantee of success. We believe that advances in materials science and technology will benefit patients with joint disease even more.