calcium
(KAL-see-um) A chemical found in teeth and bones. Eating foods with calcium helps your teeth stay strong. Milk has lots of calcium in it.
saliva
(suh-LY-vuh) The clear liquid in your mouth. It keeps your mouth wet and helps you swallow food. It also washes your mouth as you eat.
cavities
(KAV-uh-teez) Rotten spots or holes in teeth.
