First, why should pay attention to oral hygiene maintenance during orthodontic treatment 1, due to the interference of the brackets, food residue is not easy to clean easily stored on the teeth, so that the plaque collection growth. 2, long-term accumulation of plaque is easy to cause gingivitis, periodontitis, resulting in red and swollen gums, easy to bleed. 3, plaque and soft scale for a long time around the bracket and the neck of the teeth is very easy to cause demineralization of teeth, affecting the beauty of teeth. Second, how to maintain oral hygiene 1, diligent brushing teeth every morning and evening, after meals should be carefully brushed, time about 3 minutes, the strength should be appropriate. In brushing, the bristles should be 45 degrees from the tooth surface and chatter back and forth along the tooth space and tooth surface, and the bristles of the toothbrush should be stretched into the area between the brackets and the arch wire as far as possible. If possible, you can use orthodontic toothbrush. When you drink or eat and cannot brush your teeth immediately, you should rinse your mouth in time. In case of gum inflammation, you should rinse your mouth with special mouthwash under the guidance of your doctor. When there is a lot of calculus or gingivitis or periodontitis, supragingival scaling or subgingival scaling should be performed under the doctor’s recommendation. 4.Regular periodontal maintenance Generally, periodontal tissue maintenance treatment should be carried out once every 3 months of orthodontic treatment, and periodontal tissue maintenance can also be carried out regularly according to the doctor’s recommendation. Third, other precautions 1, should avoid eating harder things, such as nuts, crabs, ribs, etc. 2, should avoid biting, gnawing action, such as large mouth gnawing apples, etc.. That will damage the orthodontic appliance and affect the treatment effect. You can cut food such as apples into small pieces to eat. 3, should avoid eating sticky things. Sticky things adhering to the aligners and dental surface is not easy to clean, but also may be orthodontic attachments stick down. 4, when wearing movable aligners or retainers, they should be cleaned daily and kept in cool water when not in use.