Tooth malocclusion, it is recommended to go to the stomatology department of a regular hospital or the orthodontics department of a big hospital for examination. It is necessary to take a cephalometric film and measure it by an experienced doctor to determine whether it is due to odontogenic tooth arrangement or osteogenic jaw deformity. If the odontogenic teeth are not arranged neatly, it is generally because the sum of crown widths is greater than the length of dental arch, which is medically called that the number of teeth is greater than the number of bones. It is necessary to use an appliance to correct the teeth, and it may be necessary to pull out the teeth with less function and then correct them. If the bone-derived teeth are not arranged properly, it is jaw deformity. On the basis of orthodontics, the occlusal relationship can be adjusted with orthognathic surgery, and then orthodontics can be carried out after surgery.