Generally speaking, with the development of various complex dental implant surgery techniques, any patient with a tooth loss or missing teeth can rebuild the occlusal function with dental implants. However, the prerequisite for the success of dental implants is a good oral environment with good healing ability and resistance to infection. Dental implants are suitable for the following cases: 1, neighboring teeth are not suitable for abutment teeth or do not want to grind both good teeth 2, posterior teeth are missing or all posterior teeth are missing 3, the whole mouth is missing, alveolar bone atrophy is serious, the traditional full denture restoration is poorly fixed 4, the movable denture is poorly fixed, the gums can not withstand the force or pressure 5, the high demand for denture restoration, and the conventional denture can not meet 6, tumor or trauma caused by unilateral or bilateral Jaw bone defect, need functional repair 7, ear, nose, eye – intra-orbital soft tissue and cranial angle defect of the jaw surface pseudo-reinforcement body fixation