What is a dental sealant?

A Answers (3)

  • 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.

    Thorough brushing and flossing help remove food particles and plaque from smooth surfaces of teeth. But toothbrush bristles cannot reach all the way into the depressions and grooves to extract food and plaque. Sealants protect these vulnerable areas by sealing out plaque and food.
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  • AHealthwise answered
    A sealant is a clear or white liquid plastic that may be applied to the grooves and pits on the chewing surfaces of the back teeth. The sealant hardens on the teeth and helps protect them from decay.

    Sealants can be used in children, starting at about age 6, and in teens and adults.

    This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. To learn more visit

    © Healthwise, Incorporated.

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  • ARealAge answered

    A dental sealant is one way that you can prevent cavities from developing on the chewing surface of your teeth. The sealant is a liquid plastic that is filled into the grooves of your back molars. The liquid hardens and forms a protective covering over the enamel of the tooth. The covering stops any existing bacteria in the grooves from forming acid because food cannot get stuck in the teeth anymore. With no acid in the plaque, cavities are less likely to develop. Dental sealants only need occasional repair, but can last up to 10 years. They are recommended to all children.

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