Complete tooth loss, the conventional method is the traditional complete denture restoration, the use of alveolar bone and mucous membrane support, atmospheric pressure and the adhesion of saliva to prevent falling off. At present, the oral implant technology is becoming more and more mature and widely used. Complete dentures have also become an option, with better retention and support than traditional complete dentures, and a high clinical success rate has been guaranteed. However, the implantation of complete dentures requires higher costs and a longer production cycle, and also has certain requirements on the patient's oral local conditions and systemic conditions.