A dental sealant is a plastic material applied to the chewing surfaces of the back teeth. This plastic resin bonds into the depressions and grooves of the chewing surfaces of the back teeth.
The sealant acts as a barrier, protecting enamel from plaque and acids. Cleaning teeth by thoroughly 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. Dental sealants protect these vulnerable areas by “sealing out” plaque and food.