Orthodontics is the branch of dentistry that corrects the position of teeth and jaws positioned improperly. Crooked teeth or teeth that do not fit properly are difficult to be kept clean and can be lost early due to decay and periodontal disease. Also cause additional stress to the chewing muscles that can lead to headaches, TMJ syndrome and pain in the neck, shoulders and back. Crooked teeth or poorly positioned also impair its appearance. Can be divided into preventive, interceptive and corrective. In addition, many devices can be used depending on the problem, including among them the aesthetic and lingual appliances.