After the patient has registered and visited the orthodontic department, the orthodontic treatment can be started after the doctor has examined, diagnosed and received the patient. Before treatment, a series of preparation work is needed. Such as taking a dental model, taking a facial image, taking X-rays, and testing liver function, etc. The doctor has to determine the diagnosis and make the orthodontic treatment plan based on the model analysis and X-ray cephalometric data results. For complex cases, expert professors will be consulted. Before orthodontic treatment, it is also necessary to treat dental and periodontal diseases in the oral cavity, such as treatment of dental caries and cleaning of dental calculus. The course of orthodontic treatment is long, usually 1.5-2 years. Regular follow-up visits (about once a month) are also required. Therefore, patients should be fully prepared and should not be in a hurry and should try to avoid stopping halfway. After the patient wears the aligner, he or she should strictly follow the doctor’s instructions and actively cooperate with the doctor so as to ensure the effectiveness of the treatment. Parents should do a good job of education and help. Patients and parents should trust the doctor and have confidence in the treatment, all of which are conducive to the smooth progress of treatment. Patients wearing orthotics, there will be mild pain, soreness and other uncomfortable feelings, the orthotics also do not adapt to the normal phenomenon. It takes some time to adapt to the process, and during the orthodontic period, there will be a certain degree of impact on eating. Note that you can not eat too hard, too sticky food, front teeth can not directly chew hard food to prevent damage to the aligner. It is very important to maintain good oral hygiene during orthodontic treatment, because the resistance of teeth and periodontal tissues is reduced during orthodontic treatment, and poor oral hygiene will lead to teeth and periodontal caries and gingivitis more easily than usual. So you must insist on brushing your teeth carefully in the morning and evening and after meals. Especially for fixed aligners, it is not easy to clean them, so each time you brush your teeth, you must be clean and thorough, not to cope. Live aligners should also be brushed and cleaned every day, otherwise there will be a bad smell over time. Children are growing and the aligners restrict the intake of some foods, so children should be properly nourished during the orthodontic period. Patients must have regular follow-up appointments to avoid affecting the progress of orthodontic treatment, prolonging the course of treatment, or even causing damage to the periodontal tissue. Active orthodontic appliances and require patients to hang their own rubber band traction, should be worn according to the time prescribed by the doctor, can not be removed at will to play, not to mention simply do not wear because it is uncomfortable or unattractive, patients should cherish the orthodontic appliances to avoid damage, loss, and can not disassemble and add force because of curiosity, these are not conducive to normal orthodontic treatment. Patients who find accidental damage, such as plastic substrate or wire breakage in movable aligners, brackets in fixed aligners, band rings falling off, broken arch wires, etc., or some symptoms, such as prolonged tooth pain, significant tooth loosening, aligners irritating oral soft tissues, etc., should contact the doctor promptly so that they can be dealt with as soon as possible. Various problems may also occur during orthodontic treatment. Patients should promptly reflect the problems to the doctor at each follow-up visit, and should never take matters into their own hands to avoid adverse consequences.