All missing maxillary teeth can be restored with full fixed implant denture, which belongs to the fixed restoration with good stability and cannot be taken off and worn by oneself, as follows. 1. Full maxillary fixed implant denture is made from the bottom crown or bracket and screws to fix the upper structure directly on the implant abutment, the patient can not take off and wear it by himself, the support and retention of the upper structure is completely borne by the implant, generally 4~10 implants are needed, and the upper structure can be designed as a whole or in segments. 2. Full jaw fixed implant has good stability, high chewing efficiency and comfortable use. However, it is not suitable for those who have jawbone defects, large intermaxillary space, poor oral hygiene maintenance, etc. For the same disease, patients with different conditions will choose different treatments. It is recommended to go to the hospital for targeted treatment.