Tooth Decay is a result of bacteria in the mouth that makes acids that eat away at the tooth. When sugar and starches are consumed on a regular basis and plaque is left on the teeth, it produces acids and destroys tooth enamel over a period of time. Tooth decay will often lead to cavities if left untreated.
Treatment
Most tooth decay can be treated by using fluoride, a filling, or, in more extreme cases, through a root canal or a crown.
Prevention
You can prevent tooth decay by regularly brushing and flossing your teeth, regularly scheduling hygiene checkups with your dentist, and limiting foods that are high in sugar.