Buck teeth are generally called maxillary protrusion in medicine. The treatment method depends on the cause. It is recommended to go to the dental department of a regular hospital or the orthodontic department of a large hospital for clinical examination, take lateral cephalograms, and perform cephalometric measurements. According to the judgment of an experienced doctor, it is an odontogenic maxillary protrusion or an osteogenic maxillary protrusion. If it is odontogenic maxillary protrusion, it means that the maxillary bone is normal, and the protruding teeth can be returned to the correct position through orthodontic treatment, and the teeth with relatively small functions may need to be extracted. If it is bone-derived maxillary protrusion, straightening the teeth alone cannot solve the problem, and orthognathic surgery may be required. At this time, preoperative orthodontics according to the requirements of orthognathic surgery are required, and then surgery is performed. Postoperative orthodontics may also be required to adjust the occlusal relationship.