What is a Sealant?

How does a sealant help prevent decay? A sealant is a plastic material that is usually applied to the chewing surfaces of the back teeth—premolars and molars. This plastic resin bonds into the depressions and grooves (pits and fissures) of the chewing surfaces of back teeth. The sealant acts as a barrier, protecting enamel from plaque and acids. Sealants are serious protection against decay, and are worth looking into.