1, orthodontic appliances (brackets) are fixed to the tooth surface by bonding, and under normal circumstances, including eating, will not fall off. However, if you eat something too hard, especially after gnawing on the bone or eating tougher food, the brackets will fall off from the tooth surface and lose their orthodontic effect. Therefore, orthodontic period avoid eating food with bones, including chicken, rabbit, ribs, etc.; of course, has been removed from the bone of the net meat no problem. In addition, do not swallow, chew slowly. If you feel a hard object against the bracket when chewing, you cannot continue to bite. Once the brackets fall off, the tooth will be out of control, which will affect the efficacy of treatment, prolong the course of treatment, and additional costs will be incurred for re-gluing the brackets. At this time, you should contact your orthodontist in order to make timely treatment. 2, after eating, food residue will gather around the aligner, if not removed in time, will corrode the teeth, causing gingivitis and odor. Therefore, after each meal (including three meals and snacks), you need to brush your teeth immediately and carefully check whether there is food or white soft scale left around the aligners. If you are at school at noon, please bring your toothbrush to school. Please also bring your toothbrush with you every time you come to the hospital for a follow-up appointment. For small gaps where a regular toothbrush cannot get in, you will need to buy a “small head” toothbrush or an “interdental brush”. These can be found on Taobao. For those who are especially prone to caries, especially adjacent surface caries, you need to learn to floss while wearing braces. In the case of going out without toothbrush, it is necessary to rinse the mouth in time to minimize the food residue. 3.After each rechecking and strengthening, the tooth will produce a slight pain. And the pain is all gradually reduced. This pain is usually tolerable and no medication is needed. The pain usually lasts for 3 to 5 days and rarely more than 1 week. To reduce pain, choose foods that are as soft as possible. At the beginning of treatment, ulcers may develop due to the irritation of the mucosa by the brackets, at which point mucosal protective wax may be used. If a sharp part of the aligner (such as the end of the wire) is suddenly found to pierce the mucosa, it can be treated at our clinic at any time. If the attending doctor is not at work, there is a special doctor on duty to deal with; if there is a sudden accident at night, you can also go to our emergency department to deal with