After eating, food debris will collect around the aligner, if not removed in time, the surface of the teeth will be demineralized and form chalky plaque in the light, or cavities will be formed and the dental pulp will be injured in the heavy cases. In addition, bacteria can also cause gingivitis and produce bad odor. The picture below is a typical lesson, because of poor cleaning during orthodontic period, although the teeth are aligned neatly, a large amount of white demineralized lesions are produced, which seriously affects the aesthetics. Therefore, it is important to brush carefully after each meal (including three meals and snacking) to clean the food and soft white scale left around the aligners. Please bring your toothbrush with you when you are at school or when you eat out; please also bring your toothbrush with you every time you come to the hospital. It is recommended to buy a travel toothbrush bag for easy carrying. Also brackets damage the bristles, so you need to get a new toothbrush every month during orthodontic treatment. If food is hidden in some small gaps where ordinary toothbrushes cannot enter, a special “interdental brush” is needed. For those who are particularly susceptible to caries, especially adjacent surface caries, they also need to learn to floss while wearing braces. For those who are prone to gingivitis, mouthwash should also be used in conjunction. Chewing gum can also be helpful when occasionally going out without a toothbrush (without causing the brackets to fall out). In addition, care should be taken to clean your teeth regularly during orthodontic treatment with the advice of your doctor. Teeth not only need to be straight, they must also be healthy to be truly beautiful!