The precautions to be taken in the process of orthodontic treatment are as follows: First: fixed aligners are bonded to the teeth by special materials, in which the teeth may feel sore due to the force during two to five days. The oral mucosa may also be bruised by the aligners, but these can be tolerated and prevented, and will disappear automatically after one week, usually without medication, and patients may feel tightness and pain in the teeth after each subsequent follow-up, but it is very mild, on the contrary, severe pain is not normal. Second: you can brush your teeth after wearing orthodontic appliances, and you have to be more careful, you must pay attention to oral hygiene and correct brushing method. Third: orthodontic treatment will not affect eating. You should also pay attention to what you eat. Foods that are too hard and sticky will damage the aligners or cause them to fall off, thus affecting the treatment effect (these foods include: hard candy, soft candy, plums, peanuts, bones, barbecue, sugar cane, apples, pears, etc.). The daily rice, green vegetables, eggs, meat, etc. can be eaten as usual, some food really want to eat is not without a solution, such as ribs, chicken and duck, you can pick off the meat to enjoy, apples and pears can be peeled into slices to eat, sugar cane can be squeezed to drink, so it seems to eat will not have a great impact. Fourth: After the orthodontic appliances are placed, the follow-up visit is usually once a month. Fifth: near the end of the treatment, according to the patient’s situation to make a retainer, in order to maintain the achieved orthodontic effect, as long as adherence to wear, generally will not recur.