Clinically, many patients visit the clinic for maxillary protrusion, but some patients can be solved by orthodontic extraction, but some patients can not be solved by orthodontic extraction, the main reason is the different causes of maxillary protrusion: 1, dental maxillary protrusion, can be corrected by orthodontic extraction; 2, bony maxillary protrusion, need to be treated with the help of surgery on the basis of orthodontics, specific bone can be divided into Therefore, patients need to go to a regular hospital for clinical examination and imaging examination to determine the cause of maxillary protrusion and to develop a complete treatment plan for the cause in order to achieve the ideal treatment effect.