Knights wear armor to protect them in battle. Sealants are like armor for your teeth. They seal the parts of your teeth you use to chew, and keep out the food and bacteria that make cavities. Cavities are holes in your teeth.

Sealants are put on your back teeth. These teeth are called molars and premolars. The tops of these teeth have little grooves. Food gets stuck in these grooves and a toothbrush can't always get it out. Sealants fill in the grooves and keep the food out