The molars and premolars at the back of the mouth have deep pits and fissures that collect food and plaque, and bristles simply cannot reach the bottom of them. A dental sealant is a thin protective coating painted onto these chewing surfaces, sealing out the bacteria and acid that start cavities.
Applying a sealant is quick and painless, needs no drilling or anaesthetic, and is especially valuable for children soon after their adult back teeth arrive. Sealants complement rather than replace brushing and fluoride, so ask at your next check-up whether they would help protect your family's teeth.