Implant technology is currently the most advanced means of mature treatment to restore missing teeth. Compared with the previous restoration methods, it has the following points: 1. alveolar bone support, stable retention, and basically restores the function of the original natural teeth; 2. no damage to adjacent teeth, avoiding excessive bite force burden on adjacent teeth; 3. long restoration time, as long as there is good osseointegration, it can be used for a long time; 4. no lasting effect on alveolar bone resorption; 5. cosmetic effect, for anterior teeth The ideal cosmetic effect can be achieved by dental implant treatment for missing front teeth; 6. Dental implants also have shortcomings, mainly the following two: 1) long treatment period, usually three months for maxillary teeth and six months for mandibular teeth; 2) treatment cost is more expensive than general dental implants.