The correct term for braces should be orthodontic appliances, orthognathic surgery is generally required to wear orthodontic appliances to cooperate with the treatment, usually need to wear orthodontic appliances before orthognathic surgery and after orthognathic surgery, as follows. 1. Before orthognathic surgery: If the position of teeth in the jawbone is abnormal, patients who need orthognathic surgery need to wear orthodontic appliances before orthognathic surgery for orthodontic treatment, which is beneficial to adjust the teeth to the appropriate position and provide reference for the boundaries of orthognathic surgery. 2. After orthognathic surgery: It is necessary to cooperate with orthodontic treatment to make fine adjustments to the position of the teeth and establish a normal occlusal relationship, which helps to maintain the efficacy of orthognathic surgery. It is recommended to go to the hospital to receive professional and regular treatment.