Before we perform a joint replacement, the question that doctors are often asked by patients and families is how many years will my prosthesis last? This question is often difficult for doctors to answer, because the prosthesis is a replacement for the joint, but not a complete replacement, it has many differences with the real joint, it does not completely replace the function of the joint, it is non-physiological, so it has a service life, if it is used normally it will last a long time, if it is used incorrectly it will last a short time, we often see joints that have been used for 20 years, but we can also see joints that have been repaired in 1 or 2 years. However, our patients are often elderly, or lack of medical knowledge, and often forget what the doctor tells them, and cannot use the joint correctly according to the doctor’s requirements. This requires our patients to establish a good communication relationship with their doctors, to follow up regularly, to prevent falls, to prevent overuse, and to make our joints last as long as possible.