Under normal circumstances, the femoral head replacement surgery can be used for 15-20 years afterwards, but the specific factors that affect whether it can be used for 15-20 years are the quality of the prosthesis, the level of installation, and the frequency of use, as follows: 1. the quality of the prosthesis: the life expectancy of the prosthesis varies with the texture of the prosthesis. 2. the level of installation: if the surgical installation is not effective, it will also affect the life expectancy of the prosthesis. 3. the frequency of use by the patient: If excessive weight bearing for a long time to carry out activities, it will also affect the service life of the prosthesis. Usually to extend the life of the femoral head replacement after use, the quality of the selected prosthesis must be relatively good, the need for professional orthopedic surgeons to perform fine surgery, and the need for appropriate local protection at a later stage.