Dental sealants are one of the best ways to lower the chances of getting a cavity. Sealants are recommended for children as soon as their teeth are fully erupted into the mouth. Sealants protect the teeth from developing occlusal cavities. Occlusal means the biting surface of the tooth. By penetrating the pits and fissures (grooves) of the teeth, the sealant material is a physical barrier against cavities because it prevents food and bacteria from getting trapped. Sealants can also help arrest the early stages of an existing cavity.
The evidence shows that dental sealants are safe and very effective at protecting teeth from occlusal decay in both baby teeth and adult teeth.