Do I need orthodontic treatment before and after orthognathic surgery? Is it risky? Do I need orthodontic treatment before and after orthognathic surgery? Orthognathic surgery is a complex and delicate procedure. In order for the surgeon to move the bone segments conveniently during the surgery and position the jaws accurately, it is necessary for the orthodontist to complete some work before the surgery, which is the content of the preoperative orthodontics, which includes: aligning the teeth, eliminating the interference of dental tires, eliminating the upper and lower anterior teeth compensatory labial tilt or lingual tilt, so that the orthognathic surgery can be carried out correctly. Preoperative orthodontics is an important step in ensuring the success of surgical orthodontics and takes from one to one and a half years. After the orthodontic patient has completed the surgical procedure and the mylar plate has been removed, the orthodontist should carefully examine the patient’s dental relationships and make further fine adjustments for malocclusion of the remaining individual teeth in order to perfect the dental tire relationships. This is postoperative orthodontics and takes about six months. Is orthognathic surgery risky? There are risks associated with any surgery, even the smallest, such as postoperative incision infections and nerve damage, but there is no greater risk than a life-threatening situation. For orthognathic surgery, it is a relatively large operation with high requirements on anesthesia, surgical techniques, site conditions, nursing care and rehabilitation, so it needs to be done in a hospital with standardized management and good technical strength, where the doctors can minimize the possible risks through their surgical techniques and clinical experience.