Before undergoing orthodontic treatment, it is important to pay attention to oral hygiene, and if inflammation of the gums occurs, it is important to wait until it is cured before “shaping”. It is important to note that orthodontics is not just about wearing braces. Some patients may have overcrowded teeth and not enough space, so one or more teeth will need to be removed to ensure their final aesthetic appearance. Once the aligners are on, it is important to pay attention to the cleanliness of the mouth. The surface of the aligners is often less smooth and food tends to stick to it, which requires careful removal of debris when brushing the teeth. In addition, the braces are a delicate device that requires careful care. Avoid eating hard foods as much as possible and be gentle when brushing your teeth to prevent the treatment effect from being affected by damage to the braces. Some people may experience tooth soreness and even pain when they first start wearing braces, so patients need to be prepared and believe that they will get through it.