Orthodontic treatment indications are common in the following cases: 1, first of all, the patient has the desire for treatment, certainly have their own complaints, and then the patient examination, after making a diagnosis, that the patient’s condition is a malocclusion needs to be corrected, according to the requirements that the complaints hope to achieve, that can be achieved, it can be done; 2, the patient has no contraindications to the orthodontic treatment, whether or not the orthodontic treatment, first of all, consider whether or not the patient will have a systemic Diseases or systemic diseases, or acute and chronic disorders, if there is a need to go for treatment before doing orthodontics; 3, stomatology specialties, the patient’s oral environment is suitable for orthodontics now, if the patient has acute or the most serious is the progression of periodontitis, such as some of the adult patients, at this time whether the orthodontics can be done, if it is the acute stage must be asked to periodontist for basic maintenance and periodontal Treatment, to be perfected before doing orthodontics, that is, must be the general condition and oral local condition without contraindications, and is healthy before starting orthodontic treatment.