Dental sealants are placed as a barrier to prevent against cavities. They are a plastic material that is most applied to the chewing surfaces of the back teeth where decay occurs most often. Sealant material fills the grooves, pits and fissures on the tooth surface to prevent food and plaque from accumulating in these areas. Sealants are easily applied in a single visit. The plastic resin is painted on and bonded to the tooth surface. When a sealant is intact the tooth surface is protected from decay. During your regular dental check-ups the condition of your sealants will be evaluated and reapplied when necessary. The likelihood of developing pit and fissure decay begins early in life, so children and teenagers are obvious candidates. But adults can benefit from sealants as well.