Orthodontics is a specialty branch of dentistry with focus on dental and dentofacial irregularities.
The purpose of orthodontic treatment is to create a healthy, functional “bite,” which is part tooth alignment and part jaw position. When jaws and teeth line up correctly, they are able to function as nature intended. This promotes oral health and general physical health. That orthodontic treatment also brings about an attractive smile is an added bonus (aaoinfo.org)