Dental Sealants: Do Children (and Adults) Actually Need Them?

Dental sealants are thin protective coatings applied to the chewing surfaces of the back teeth — the molars and premolars — where the deep grooves and pits make them especially vulnerable to cavities. Despite being one of the most evidence-supported preventive procedures in dentistry, sealants remain underutilized. The CDC estimates that school-age children without sealants have almost three times more cavities than children with them.

Why Back Teeth Are Vulnerable

The chewing surfaces of molars and premolars have deep grooves (called fissures) and pits that are so narrow that toothbrush bristles cannot reach the bottom. Food and bacteria accumulate in these spaces and, over time, cause cavities — even in patients who brush and floss consistently. Sealants fill and seal these grooves, creating a smooth surface that's easy to clean and resistant to decay.

Who Should Get Sealants?

Children are the primary candidates. The CDC and ADA recommend sealants on permanent molars as soon as they emerge: first permanent molars typically around age 6, and second permanent molars around age 12. Applying sealants immediately after eruption — before cavities have a chance to form — provides maximum protection during the most cavity-prone years. Adults with deep grooves and no existing decay or fillings in their molars can also benefit from sealants, though the window of maximum benefit is during childhood and adolescence.

The Sealant Procedure

Applying dental sealants is painless, quick, and requires no anesthesia. The tooth is cleaned, a mild acid solution is applied briefly to roughen the surface for better bonding, the acid is rinsed off, the tooth is dried, and the liquid sealant is painted into the grooves. A curing light hardens the sealant in seconds. The entire process takes a few minutes per tooth. Patients can eat and drink normally immediately after.

How Long Do Sealants Last?

Sealants typically last 5 to 10 years with normal chewing wear. They're checked at each routine dental visit and can be repaired or reapplied when they show wear. Even a sealant that has partially worn away still provides protection in the areas that remain sealed. The cost of reapplying sealants is always less than the cost of filling the cavities they prevent.

Cost and Insurance Coverage

Dental sealants typically cost $30 to $60 per tooth. Most dental insurance plans cover sealants for children up to age 18 on permanent molars as a preventive benefit — often at 100% cost sharing. Some plans also cover sealants for adults in certain circumstances. Check your plan's specific benefit language, as coverage cutoff ages vary.

Are Sealants Safe?

Sealant safety has been studied extensively. Earlier sealants contained BPA-releasing compounds; modern sealant materials are reformulated and the amount of any BPA exposure from dental sealants is far below safety thresholds according to both the ADA and American Academy of Pediatric Dentistry. The established benefit of preventing tooth decay — which requires drilling, anesthesia, and filling materials — far exceeds any theoretical concern about modern sealant materials.

Final Thoughts

Dental sealants are a straightforward, painless, evidence-based preventive measure that reduces cavity risk in the most vulnerable teeth. For children getting their first and second molars, sealants should be a routine part of pediatric dental care. Ask your dentist or your child's dentist whether sealants are appropriate at the next visit.