The most likely location for a cavity to develop in your child’s mouth is on the chewing surfaces of the back teeth. Run your tongue over this area in your mouth, and you will feel the reason why: These surfaces are not smooth, as other areas of your teeth are. Instead, they are filled with deep grooves referred to as “pits and fissures,” which trap bacteria and food particles. The bristles on a toothbrush can’t always reach all the way into these dark, moist little crevices. This creates the perfect conditions for tooth decay.
Dental sealants are a thin coating that covers and smooths out the chewing surfaces of the back teeth, making them resistant to decay. A sealed tooth is far less likely to develop a cavity, require more expensive dental treatment later on, or, most importantly, cause your child pain.