Surgery is generally divided into three steps. In short, orthodontics-orthognathic-combined therapy is divided into three parts: preoperative orthodontics, orthognathic surgery and postoperative orthodontics. Because of the surgical treatment of patients with dentofacial deformity, it is necessary to cut and move the odontoid complex according to the deformity and treatment requirements, rebuild the three-dimensional spatial relationship and function of normal dentofacial structure, and obtain satisfactory maxillofacial cosmetic results. Therefore, we should accurately consider and design the treatment plan, the adjustment of the relationship between teeth and jaws, the position of bone incision, the moving direction and distance of bone fragments and the choice of surgical plan before operation, and predict the expected treatment effect of the selected plan before operation. After the orthognathic surgical treatment plan for dentofacial malformation is determined, strict treatment procedures must be followed in order to obtain the best expected effect and avoid possible mistakes.
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