Dental sealant is a dental treatment intended to prevent tooth decay. Teeth have recesses on their biting surfaces. The back teeth have fissures or grooves and some front teeth have cingulum pits. It is these pits and fissures which are most vulnerable to tooth decay.
Food sticks in them and they are hard-to-clean areas. Dental sealants are materials placed in these pits and fissures to fill them in, creating a smooth surface that is easy to clean.
Dental sealants are mainly used in children who are at higher risk of tooth decay, and typically they are placed as soon as the adult molar teeth come through.