A dental sealant is a thin, plastic coating that is applied to the chewing surfaces of the back teeth (molars and premolars). The sealant forms a barrier that protects the teeth from decay-causing bacteria and food particles that can get trapped in the deep grooves and pits of these teeth.

Sealants are typically applied to the teeth of children and teenagers, as these teeth are more prone to decay due to the difficulty in cleaning the deep grooves and pits. However, adults can also benefit from sealants.

The application of a sealant is a quick and painless process that involves cleaning the teeth, drying them, and then applying the sealant material to the chewing surfaces. The material is then cured with a special light to harden it.

Sealants can last for several years and can be reapplied if necessary. However, they do not replace the need for regular brushing and flossing, and a healthy diet to maintain good oral hygiene.