1. After osteotomy, push the maxilla backward, remove alveolar bone and unnecessary bone, and move the maxillary anterior bone block backward to the required position.

2. Pull out the supernumerary teeth in the upper dental arch, correct the dislocation of the front teeth, and coordinate the length and size of the upper and lower dental arches.

3. Correct the distal position of mandible at an early stage, stimulate the normal development of mandible and inhibit the overgrowth of maxilla.

4. Maxillary protrusion surgery is feasible for patients with severe jaw deformity.

5, the need for surgical treatment, can be in accordance with the doctor's advice before and after maxillary protrusion surgery for nursing work, routine use of anti-infective drugs.