Osteotomies are oral orthognathic surgeries that generally take about 4 to 6 weeks to heal essentially after surgery on the upper jaw, while the lower jaw takes about 6 to 8 weeks to heal. Osteotomy is clinically known as orthognathic surgery, which is an orthodontic procedure in which part of the alveolar bone is cut in order to pull the teeth to the desired position. Due to the regenerative function of the alveolar bone, after a period of time, the truncated alveolar bone heals and then starts the orthodontic program. Since the bone quality of the maxillary alveolar bone is relatively loose, it usually takes 4 to 6 weeks for the amputated alveolar bone to heal, while the bone quality of the mandibular alveolar bone is relatively stable, so the healing time is prolonged to 6 to 8 weeks. In addition, the healing time of osteotomy surgery is also related to the patient’s physical condition, oral hygiene and other factors, generally poor physical condition, poor oral hygiene, the healing time after osteotomy surgery will also be extended.