Dental implant is a highly recommended method to treat dentition defect in clinic at present. Compared with traditional fixed denture and removable denture, it has less damage to adjacent teeth and is a good denture restoration method. It is very suitable for dental implant restoration of adjacent teeth that cannot be used as abutment, teeth with free end missing or mandibular alveolar ridge severely atrophied, which cannot be repaired with traditional dentures, and has high requirements for restoration and aesthetics, insufficient bone height and thickness, insufficient attached gums, or unilateral or bilateral jaw defects. However, if the patient's general condition is poor, his bones are poor, his teeth are loose or he grinds his teeth habitually, and his oral hygiene is poor, such a person cannot implant his teeth.