Even if your child brushes and flosses carefully, it is difficult (sometimes impossible) to clean the tiny grooves and pits on certain teeth. Food and bacteria build up in these crevices, placing your child in danger of tooth decay. Sealants "seal out" food and plaque, thus reduce the risk of dental decay (cavities).
Sealants are protective coatings helping to keep teeth cavity-free. They are made of clear or tooth-colored plastic applied to the grooved and pitted surfaces of the teeth. Generally, sealants are applied to the chewing surfaces of back teeth where most cavities in children are found.