The elderly implants have several characteristics compared to the young and middle-aged: I. The elderly own physical condition: In fact, dental implants generally do not have age restrictions, the elderly can also be implanted, there have been cases of successful implantation of dentures for 80-year-olds abroad. However, the prerequisite is that chronic diseases common to the elderly such as diabetes, hypertension, heart disease and cerebrovascular disease have been well controlled. Second, the elderly’s own oral condition: compared to young people, the elderly wear dentures for years or a long time suffering from dental disease, alveolar bone atrophy is more serious. For patients with poor alveolar bone condition, the oral surgeon can increase the height and width of the alveolar bone by implanting bone before the dental implant surgery, and the alveolar bone can fully meet the requirements of dental implants after the surgery. In general, elderly people with certain medical conditions or diseases that are well controlled can undergo dental implant surgery and complete the dental implant restoration as long as they can afford to have their teeth extracted. In addition, the oral cavity should be free of inflammation and mucosal disease. Third, the elderly generally have more missing teeth in their mouths, and the design of implants is different from that of young and middle-aged people. Young people are usually missing a single tooth and are usually made into a fixed denture. In contrast, the elderly have to choose the restoration method according to their conditions. For example, in the case of the patient we mentioned earlier, he had no teeth in the lower half of his mouth, so he could have two types of restorations. It requires 6-8 implants and the chewing effect is well restored. 2. Implant-supported overdenture. 2-4 implants are needed to provide retention and support. Fourth, the psychological situation and economic situation. There are many elderly people who think that it is normal to lose teeth when they get older, and that it is okay to eat when you are old, so it is troublesome to set teeth. This is not the right way to think. Li Yan pointed out that if you don’t deal with the tooth loss, the empty place will not only affect the beauty and chewing, but also the tooth bed and alveolar bone will be absorbed over time, and the surrounding teeth will also be tilted to the empty place. If this happens for a long time, not only will the function of the teeth be damaged, but it will also be more difficult to set the teeth again. Fifth, the complexity of dental implants for the elderly is higher than that of young people. The ultimate goal of dental implants is to set teeth and restore chewing function. Because there are more teeth missing in the elderly, it is not possible to plant them immediately in the hospital. First of all, we have to take a study mold, simulate the final effect on the model, then communicate with the patient, sometimes we have to make the teeth and try them out in the patient’s mouth, and then make an implant guide according to the design and the actual alveolar bone condition of the patient, and determine the implant position on the alveolar bone according to the guide. Only after all these are done can the implant be started.