The life span of dentures varies according to the type of dentures, as follows: 1. The life span of movable dentures is about 3-5 years, with a review of about 1-2 years. Because the movable denture has a substrate under, need to use the ring, jaw support for fixed, easy to break or broken in the process of use, if broken, broken, it is recommended to go to the hospital immediately to repair. If after repeated repair, no longer adapt to the intraoral situation, can not function properly, it is recommended to replace the movable denture; 2, fixed denture service life varies from person to person, depending on the doctor’s approach, selection of materials, post-operative maintenance and different, it is recommended 3-5 years to review 1 time, in time to find abnormalities, effectively extend its life.