Dental implants are theoretically permanent, but in clinical work, it is impossible to assess how many years the teeth can be used, mainly related to the following factors: 1, oral hygiene: after implantation of dental implants and bone form an osseointegration between the implant and the bone, the upper part is a restorative crown, and the crown is fixed with an abutment screw between the crown and the implant. As long as the oral hygiene is ideal, there is no bacteria and food residue around the implant, it is less prone to peri-implantitis, and the life of the implant without inflammation will be longer; 2. Restoration materials: Currently, metal porcelain or all-ceramic materials are the main materials for restoration, which have a certain degree of wear resistance and strength, but also a certain degree of brittleness. Patients should not chew particularly hard food or bones during use, so that the restoration will not have too many problems; 3. Chewing habits: for example, some people grind their teeth at night, which will affect the service life of the implant.