Hello! 1. If you have dental caries, periodontitis, oral ulcer and other oral diseases, you should cure them first before orthodontics and convex plastic surgery. Men should stop smoking for a period of time before undergoing orthodontics and plastic surgery. 3. Female friends should avoid menstrual period and pregnancy when doing orthodontic plastic surgery. Contraceptive pills and some anti-inflammatory drugs can lead to increased bleeding, so these drugs should be stopped some time before orthodontic plastic surgery.