When kids turn about six years old, their first permanent molars begin to emerge. As you probably know, molars are the largest teeth in the mouth, and they have all sorts of little rough grooves and valleys – perfect places for food and bacteria to become stuck and start causing cavities.
Sealants are like a white paint that fill in the deepest parts of those grooves and valleys, which we make hard by shining a blue light on the material. These hard sealants block food and bacteria from becoming stuck there, and prevent cavities on the biting surfaces of teeth.