Buckteeth are commonly called maxillary protrusion in medicine, and the treatment depends on what causes it. It is suggested to go to the stomatology department of a regular hospital or the orthodontics department of a big hospital for clinical examination, take lateral cephalometric photos and make cephalometric measurements. Experienced doctors judge whether it is odontogenic maxillary protrusion or osteogenic maxillary protrusion. If it is odontogenic maxillary protrusion, it means that the maxilla is normal, and the protruding teeth can be restored to the correct position through orthodontic treatment, and it may be necessary to pull out the teeth with less function. If it is osteogenic maxillary protrusion, simply correcting teeth can't solve the problem, and orthognathic surgery may be needed. At this time, it is necessary to perform preoperative orthodontics according to the requirements of orthognathic surgery, then perform surgery, and may also adjust the occlusal relationship with orthodontics after surgery.