Cavity Prevention for Kids
Dental Sealants
A thin, protective coating that seals out the bacteria and food particles that cause cavities. Quick, gentle, and remarkably effective.
Reviewed by Dr. Mini Nair, DDS — Updated 2026
What is a dental sealant?
A dental sealant is a thin, tooth-colored resin that's painted onto the biting surfaces of the back teeth (molars and premolars). It flows into the deep grooves and pits where toothbrush bristles struggle to reach, then hardens into a smooth, protective barrier.
Who benefits most?
- Children and teens, as their permanent molars come in (ages 6 and 12 are the most common windows).
- Adults with deep grooves in their molars who are cavity-prone.
- Any patient whose home brushing struggles to reach the back of their mouth thoroughly.
Why sealants work
The majority of cavities in children form in the tiny grooves on the chewing surfaces of back teeth. Those grooves are physically smaller than a toothbrush bristle — so no matter how carefully you brush, food and bacteria get stuck in them. Sealants fill those grooves in, leaving nowhere for decay to take hold.
Studies show sealants can reduce the risk of cavities on back teeth by up to 80%. They're one of the highest-ROI preventive treatments in all of dentistry.
The process
- No drilling, no numbing, no pain.
- The tooth is cleaned and dried.
- A mild conditioning gel is applied briefly to help the sealant bond.
- The sealant is painted on and hardened with a curing light.
- Your child is done — usually in less than 10 minutes per tooth.
How long do they last?
Sealants can last up to 10 years, though they'll be checked at every routine visit. If any are chipped or worn, we reapply them.
For adults, too
Sealants aren't just for kids. If you're an adult prone to cavities — particularly in the back teeth — ask us whether sealants are a good fit for you.
Frequently Asked Questions
What age should my child get dental sealants?+
The best time is as soon as permanent molars come in, usually around age 6 for the first set and age 12 for the second. Sealing these teeth early gives them the best protection against cavities during the most cavity-prone years.
Do dental sealants hurt?+
Not at all. There's no drilling, no numbing, and no pain. The sealant is simply painted onto the tooth and hardened with a curing light. Most kids are done in less than 10 minutes per tooth.
How long do sealants last?+
Sealants can last up to 10 years with normal wear. We check them at every routine visit at Shenandoah Dental Center and reapply them if any have chipped or worn down.
Can adults get dental sealants?+
Yes. Adults with deep grooves in their molars who are prone to cavities can benefit from sealants too. Ask us during your next visit whether sealants make sense for you.
Are dental sealants covered by insurance?+
Many dental insurance plans cover sealants for children up to a certain age (often 14 or 16). Our front office team can check your specific plan before the appointment so you know what to expect.
Do sealants replace brushing and flossing?+
No. Sealants protect the chewing surfaces of back teeth, but brushing and flossing are still essential for cleaning the sides and between teeth. Think of sealants as an extra layer of defense, not a substitute for daily care.
Ready When You Are
Let's write the next chapter
of your smile's story.
Schedule an appointment online, or give us a call. We're accepting new patients of every age — and we'll walk you through every step.