How does a sealant help prevent decay?
Teeth that have deep depressions and grooves on their biting surfaces are prime candidates for developing decay. The surface of the tooth is first cleaned off, and then the sealant is bonded to the tooth (all accomplished without anesthetic). The sealant acts as a barrier, protecting the tooth from plaque, sugars, and acids that cause decay.
Although thorough brushing and flossing helps keep your teeth clean, the bristles cannot remove everything from the deep grooves on the biting surfaces. Sealants help to protect these susceptible areas by “sealing out” plaque and food. Sealants are an excellent way of helping to prevent decay, usually lasting several years before reapplication is needed.