Dental sealants are a great way to help stop cavities before they they start! Brushing and flossing help remove food and plaque from smooth surfaces of teeth, but toothbrush bristles can't reach all the way into the depressions and grooves. Sealants protect these areas by "sealing out" plaque and food, and as long as the sealant remains intact, the tooth surface will be protected from decay. Sealants are painless and easy for your dentist to apply. The sealant is painted onto the teeth and hardens, acting as a barrier to protect the enamel from plaque and acids. Sealants hold up well under the force of normal chewing and may last several years before they need to be reapplied.
Ask your dentist if sealants would be a benefit to you. In the meantime, happy brushing!
Info from www.mouthhealthy.org