The short version
- Painted onto the chewing surfaces of molars, no drilling or needles
- Prevent about 80% of cavities for 2 years and about 50% for up to 4 years (CDC)
- Best timing: as the 6-year and 12-year molars come in
The chewing surfaces of back teeth are full of tiny grooves that trap food and bacteria, and a toothbrush bristle is often too big to clean them. That is why, according to the CDC, 9 in 10 cavities in school-age children happen in the back teeth.
What a sealant is
A sealant is a thin coating painted onto those chewing surfaces. It flows into the grooves and hardens, creating a smooth surface that is easy to keep clean. There are no needles and no drilling. Each tooth takes a few minutes, and kids can eat normally right after.
How well they work
- Prevent about 80% of cavities in the back teeth for 2 years after they are placed
- Continue to protect against about 50% of cavities for up to 4 years
- Children ages 6 to 11 without sealants are almost three times more likely to have cavities in their first molars than those with sealants
When to get them
The best time is soon after the permanent molars come in: the first set around age 6 and the second set around age 12. We check sealants at every visit and touch them up if needed. They are covered as a preventive service for children by Virginia Medicaid and by most dental plans.
Sealants are a partner to fluoride, not a replacement. Keep up twice-daily brushing with fluoride toothpaste.
Sources
- CDC: About dental sealants
- CDC Vital Signs: Dental sealants prevent cavities
- Virginia DMAS: Cardinal Care Smiles member guide
General information, not a diagnosis. Talk with your child's dentist about their specific needs.