Implant technology is currently a mature treatment for restoring missing teeth. Compared with the previous restoration methods, it has the following advantages: 1. alveolar bone support, stable retention, and basically restoring the function of the original natural teeth; 2. no damage to the adjacent teeth, avoiding overburdening the adjacent teeth with biting force; 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. very good cosmetic effect, dental implants for missing anterior teeth The ideal cosmetic effect can be achieved with dental implants for missing anterior teeth; 6. The difficulty of restoring missing teeth at the free end can be solved; 7. Dental implants also have shortcomings, mainly the following two: 1, the treatment period is long, generally requires three months for the maxillary teeth and six months for the mandibular teeth; 2, the treatment cost is more expensive than the general dental implants.