Dental sealants are thin protective coatings that are usually placed on the chewing surface of the permanent back teeth to help protect them from decay.

The chewing surfaces of the molar and premolar teeth have grooves that make them vulnerable to decay. These grooves can be deep, are difficult to clean, and can be narrower than even a single bristle of a toothbrush. Plaque accumulates in these areas, and the acid from bacteria in the plaque attacks the enamel and cavities can develop. Fluoride helps prevent decay and helps protect all the surfaces of the teeth, dental sealants provide extra protection for the grooved and pitted areas by providing a smooth surface covering over the grooved area.