“Orthodontic treatment is used to correct a “bad bite,” a condition known as a malocclusion that involves teeth that are crowded or crooked. Correcting the problem can create a nice-looking smile, but more important, orthodontic treatment results in a healthier mouth. That’s because crooked and crowded teeth make cleaning the mouth difficult, which can lead to tooth decay, periodontal disease and possibly tooth loss.”

-colgate.com

Here is a great video about Orthodontics! from Spear Education