A full denture is based on the amount of bone it has. Some people are missing teeth for a short period of time, but the bone volume is very sufficient, in this case, usually 6-8 implants are placed in the upper jaw and 6 implants are placed in the lower jaw. When the initial stability of all the implants reaches more than 35N.cm, immediate weight-bearing can be done after surgery, that is, the same day for implantation, the same day on the line for full fixed prosthesis restoration, the patient in the morning implantation, in the afternoon there will be teeth can be used. However, if the posterior area is not enough bone, some patients are born with low maxillary sinus floor bilaterally, the bone volume is only 2-3mm, while the anterior area is more adequate, in this case, you can use All-on-4 implant technology, that is, the anterior area of the implant 2 straight implants, and the posterior area of the implant 2 oblique implant, so that two inverted triangles are formed to increase the stability of the prosthesis, that is, the use of 4 implants to support the no-loading, that is, the use of 4 implants to support the no-loading, that is, the patient will have teeth in the morning, the afternoon can be used. This is a fixed restoration of the edentulous jaw supported by 4 implants. Important anatomical structures can be avoided intraoperatively, such as the maxillary sinuses bilaterally, the mandibular nerve, and procedures such as bone grafting can also be avoided. However, the initial stability of all 4 implants is required to be at least 35 N.cm before immediate weight bearing is possible. Immediate implantation and immediate restoration of all the teeth can significantly shorten the waiting time of patients, allowing them to have their teeth on the same day of implantation. It increases patient satisfaction, improves patient quality of life, and can also reduce patient pain.