Abnormal jaw development is one of the common dental and maxillofacial deformities, often affecting facial aesthetics and occlusal function. Orthodontic treatment alone can correct odontogenic and some mild osteogenic asymmetrical deformities, but for adult patients with dental and maxillofacial deformities whose growth and development have stopped, the only way to treat them is to solve serious bone and soft tissue deformities through combined orthodontic and orthognathic surgery, in order to obtain a perfect occlusal relationship and normal jaw relationship, and to restore oromandibular function and The purpose is to restore the function of the mouth and jaw and improve the aesthetics. Wang Zhaoling, Department of Stomatology, General Hospital of Jinan Military Region Simple dental deformities can be treated by orthodontic methods, but serious dental and maxillofacial deformities often involve the deformity of the three-dimensional space of facial length, width and height, and need to be treated by modern orthognathic surgery techniques, which integrates maxillofacial surgery and orthodontic means to recombine facial bone positions according to the ideal facial structural relationships and ratios, in order to heal deformities, change facial shape, restore orofacial function and achieve facial aesthetics. The purpose of facial aesthetics is to heal deformity, change facial shape, restore orofacial function and achieve facial beauty. The normal proportional relationship between the jaws, teeth and surrounding tissues is the basis for the harmony and beauty of the face. However, due to genetic, developmental malformations and acquired factors can cause a variety of malformations (called dental and maxillofacial malformations) caused by the relationship between teeth, cranial and jaw surface, thus causing significant defects in aesthetic appearance and functional disorders of the oral and jaw system (such as poor chewing, induced oral diseases, etc.), which directly affect the quality of life of patients. Common dental and maxillofacial malformations include: protrusion of the lower jaw (geodontia), protrusion of the upper jaw (bruxism), small lower jaw (bird’s mouth deformity), receding upper jaw (discoid face), asymmetric facial deformity (crooked face), enlarged jaw angle and bite muscle (square face) and too high or too low zygomatic bone, etc. The establishment of the principle of combined surgical-orthodontic treatment has perfected the surgical treatment of dental and maxillofacial deformities, truly entering a new period of combining function and morphology, and realizing the wish of patients with dental and maxillofacial deformities to change their faces. Our department adopts standard orthognathic surgical procedures to treat patients with dental and maxillofacial malformations, generally using intraoral approach to avoid facial scars, and the technique is now very mature and reliable.