Caries: Tooth decay, which leads to a cavity.

Cementum: Holds the root of each tooth to the jawbone.

Centrals and laterals: The four front teeth on the upper and lower jaws (also called incisors).

Cuspids: The teeth near the front of the mouth that come to a single point. Sometimes called the "eye teeth" or "canines." Canine means "of or like a dog."

Dentin: Makes up the largest part of the tooth. Dentin is like bone and is almost as hard as enamel.

Enamel: A hard, shiny substance that works as a barrier to guard the inside parts of the tooth.

Molars: Teeth with a broad chewing surface for grinding food, located in the back of the mouth. See what's inside a molar.

Orthodontics: Straightening or moving misaligned teeth and/or jaws usually with braces.

Pediatric dentist/pedodontist: A dentist who treats children from birth through the teen years.

Plaque: A bacteria-containing substance that collects on your teeth. Get rid of plaque by brushing and flossing every day.

Pulp: Where each tooth's nerve endings are.

Retainer: A device used to stabilize teeth after orthodontic treatment is complete.

Sealant: A thin plastic material used to cover the biting surface of teeth to prevent tooth decay.