When dentists perform restorative treatment on patients, they are often asked, “How many years will my dentures last?” Such a question. Dr. Meng Xiangfeng, deputy director of the Department of Prosthodontics, introduced that because of the many types of dentures (denture), the materials used to make them are not exhaustive, and the conventional clinical forms of prosthetics are fixed denture, removable partial denture, full denture, etc.; the health condition of the soft and hard tissues in the patient’s mouth, the use and maintenance of the denture after wearing it, many factors affect the service life of the denture. Fixed denture, in the process of daily use, should try to avoid chewing too hard food, to prevent the surface of the teeth ornamental porcelain chipped or long-term excessive biting force caused by the loosening of the abutment teeth, reducing the service life of the denture. In addition, because this type of denture can not be removed, the maintenance of oral hygiene is particularly important, in addition to correct brushing, you can also use dental floss to clean the adjacent space that is not easy to clean, and regular hospital checkups to prevent the occurrence of secondary caries and periodontal disease. If you can use your fixed denture correctly and take good care of it, it can usually last for more than 10 years or even a lifetime. Unlike fixed dentures, removable partial dentures can be designed to take into account the remaining teeth that may be missing in the mouth in the future. In the event that the remaining teeth cannot be retained, the denture can be repaired, extending the life span and reducing the financial burden on the patient. In addition, the correct removal and maintenance of the denture directly affects the service life. For example, the denture should be placed in the correct position and seated when worn, rather than using the teeth to bite into position to prevent deformation due to improper force. After 3-5 years of denture use, the mucosa, alveolar bone and other soft and hard tissues supporting the denture in the oral cavity will be altered, resulting in a poor fit with the denture, creating fulcrum points and causing discomfort such as pressure and pain. If these changes in the patient’s mouth are not significant, the tissue surface of the denture can be relined and the repaired denture can continue to be used. When the changes are significant and not suitable for repair, a new denture will be required. In addition, a full denture will also face the need for relining or remaking after 3-5 years of use as well. In short, the life of a pair of dentures, in addition to the constraints of the material and characteristics of the dentures themselves, is also closely related to the patient’s own health status, oral hygiene habits, and regular review. In order to maximize the effectiveness of dentures, patients should learn to use dentures correctly and seek medical attention when problems are detected.