The lifespan of dental implants can vary from less than 1 year to more than 40 years. In itself, it is related to many factors and cannot be generalized. First of all, it is related to the patient’s individual condition, including the patient’s age, the quality and width of the alveolar bone, the thickness and width of the alveolar bone, and whether the patient has diabetes. Secondly, it is closely related to the specific way of operation used by the surgeon, the material used for the implant, and the postoperative maintenance. In some cases, the dental implants were used for more than 40 years after the implantation, and until the patient’s death, the implants were still intact in the patient’s mouth, providing a good service for the patient’s chewing function. However, there are also many clinical cases of dental implants that can exist due to improper implant operations and other patients who have endured greater external forces after implantation and relatively poor periodontal maintenance, and the implants have fallen out 1 year after implantation.