THE NEW YORK TIMES | Austin Frakt | September 19, 2016

Your dentist has probably offered dental sealants for your child. Mine has. Without knowing whether they work, I’ve always accepted them. Turns out, this was a good move.

Introduced in the 1960s, dental sealants are plastic coatings applied to the surfaces of teeth. They fill in and seal pits and grooves of teeth, making them more resistant to bacteria that can cause cavities.

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