These are used to prevent decay forming on primary and permanent teeth - the purpose is to fill in the groove on the biting surface or side of the tooth.

The deeper the groove, the more poor the diet, the less brushing practiced -- the more need for sealants!

They utilize the bonding technique to adhere the unfilled resin to the tooth - it is best to avoid very sticky and hard foods (ice) to keep the sealants in place.