Orthognathic surgery mainly focuses on the study and diagnosis of dental and maxillofacial deformities. Our hospital is one of the early hospitals in China to carry out orthognathic surgery, and the development of this technology has become more and more mature in the 1990s. At present, the Department of Orthognathic Surgery concentrates the directors, deputy directors and attending physicians of Orthodontics, Maxillofacial Surgery, Plastic Surgery and other specialties, and adopts the principle of combined treatment of surgery, plastic surgery and orthodontics to carry out the treatment of dental and maxillofacial malformations and facial contour remodeling, and at the same time, the Department has made remarkable achievements in the clinical application of maxillary distraction osteogenesis in the treatment of dental and maxillofacial malformations and in the diagnosis and treatment of Obstructive Sleep Apnea Syndrome. As a specialty of the hospital, the department has a number of advanced instruments and equipments, including cone-beam CT, American Skryker miniature chainsaw, endoscope, German medicon microdynamic system, German Snake jawbone dynamics system, Crown Eagle Maxillofacial Bone Dynamics System, multifunctional ultrasonic osteotome, multifunctional headlamp and magnifying glass, polysomnography, plasma ablation system, etc. At the same time, the department is equipped with anatomical jaw frame and jaw frame, which are used for the treatment of dental and facial deformities. We also have anatomical maxillofacial frame and a full set of model surgical system, international advanced Synthes Proplan CMF 2D and 3D cranial measurement and prediction analysis system. Orthognathic Surgery is the application of surgery and orthodontics to correct and treat malocclusion of teeth and jaws, on the basis of maxillofacial plastic surgery, taking into account the functional coordination of teeth and jaws and aesthetics, so that the patient not only has a beautiful appearance but also has a neat dental arrangement, thus creating a harmonious and well-proportioned appearance for the patient. Orthognathic surgery is usually performed through an intraoral incision, leaving no scar on the face. The whole treatment has a complete set of rigorous diagnosis and treatment procedures from preoperative diagnosis, preoperative orthodontic treatment, predictive analysis, model surgery, surgical correction, postoperative orthodontic and other links. In the last decade, with the trend of Oriental people’s pursuit of beauty, more and more women change their face shape through jawbone plastic surgery, in order to arrive at a melon face or goose egg face with a harmonious proportion and in line with the beauty of curves. Our hospital adopts the international advanced operation style, and has performed hundreds of cases of high zygomatic bone arch, wide jaw angle, short chin comprehensive overall shaping, so that the beauty seekers get a satisfactory face, and enhance the self-confidence. Various dental and maxillofacial bone deformities and facial bone contour cosmetic remodeling: (1) upper and lower jaw protrusion deformity; (2) upper and lower jaw retraction deformity; (3) open jaw deformity; (4) jaw deviation deformity; (5) short-face syndrome; (6) long-face syndrome; (7) cleft lip and palate secondary bone deformity; (8) high zygomatic bone and zygomatic arch deformity; (9) mandibular angular hypertrophy accompanied by cudgel muscles; (10) chin deformities; (11) old fracture resulting in maxillofacial deformities; (12) half of the facet atrophy of the orthognathic surgery (13) Orthognathic surgical treatment of sleep apnea syndrome; (14) Traction osteogenesis for severe atrophy of alveolar bone; (15) Various congenital craniomaxillofacial malformations.