Dental Sealants for Kids: Are They Worth It?

By Lovik Mirzaeian, DDS. Updated September 2026.

Dental sealants are worth it for most children. They are a thin protective coating painted into the deep grooves of the back teeth, they take a few minutes per tooth with no drilling and no numbing, and they prevent the large majority of cavities that would otherwise form in those grooves. The best time is soon after the first permanent molars arrive, around age six, and again around twelve.

Parents often hear about sealants for the first time at a check-up and are not sure whether it is a genuine recommendation or an add-on. It is genuine, and here is why.

Why Back Teeth Get Cavities

The chewing surfaces of molars are not flat. They are a landscape of pits and fissures, and some of those grooves are narrower than a single toothbrush bristle. Food and bacteria pack into them and nothing gets them out. Fluoride helps the smooth surfaces of teeth far more than it helps these grooves, which is why a child with good brushing habits can still get cavities on the chewing surfaces of their molars.

Most childhood cavities in permanent teeth start in exactly these grooves. Sealants exist for that one specific problem.

What a Sealant Is

A liquid resin, usually white or clear, painted into the grooves and hardened with a light. It flows into the fissures and sets, turning a landscape of traps into a smooth surface a toothbrush can clean. That is the whole idea.

The tooth is cleaned and dried, a mild conditioning gel is applied for a few seconds and rinsed off, the sealant is painted on and cured. No drilling, no injection, no removal of tooth structure. A child who can sit still for a couple of minutes can have it done.

How Well They Work

Very well. The American Dental Association and the CDC both report that sealants prevent around eighty percent of cavities in the grooves of back teeth in the first two years, and continue protecting for years after with occasional touch-ups. Children without sealants get roughly three times as many cavities in those teeth as children with them.

Few things in dentistry have evidence that clear.

When to Have Them Done

The first permanent molars, often called six-year molars, come through behind the baby teeth around age six without any baby tooth falling out first, which is why parents often miss them. Sealing them soon after they fully erupt gives protection during the years a child is worst at brushing.

The second permanent molars arrive around twelve and should be sealed then. Premolars, which replace the baby molars between ten and twelve, sometimes have deep grooves worth sealing too.

Baby molars are occasionally sealed if the grooves are deep and the child is at high risk, but that is a case by case decision.

How Long They Last

Five to ten years is typical, though they wear and can chip. They are checked at every routine dental exam and touched up or replaced where needed. A sealant that has partly worn still protects the part it covers.

Common Concerns

Do They Hide Cavities

No. The tooth is examined before sealing, and a sealant is not placed over active decay. A tiny amount of very early demineralisation under a sealant actually stops progressing, because it is cut off from the bacteria and sugar that feed it.

What About BPA

Some sealants contain trace compounds related to BPA. The amount is minute, exposure is momentary during placement, and it is far lower than everyday exposure from food packaging. The ADA position is that the cavity protection vastly outweighs any theoretical concern. If it worries you, ask for a BPA-free material, which is available.

Can Adults Have Them

Yes, if the grooves are deep and free of decay and fillings. It is less common because most adults have already had those teeth filled, but it is a reasonable preventive step for an adult with untouched molars and a history of cavities.

Sealants Are Not a Substitute

They protect the chewing surface. Cavities between teeth, at the gumline and on smooth surfaces still need brushing, flossing and fluoride. Sealants cover the part that brushing genuinely cannot reach, which is why the two together work so well. Our piece on a child first dental visit covers the rest of early prevention.

Frequently Asked Questions

Are dental sealants worth it for kids?

Yes, for most children. Sealants prevent around eighty percent of cavities in the grooves of back teeth, which is where most childhood cavities in permanent teeth start. They take minutes, involve no drilling, and last years. Few preventive treatments have evidence this strong.

At what age should a child get sealants?

Soon after the first permanent molars arrive, usually around age six, and again when the second molars come in around twelve. Those molars erupt behind the baby teeth without any tooth falling out, so parents often do not notice them.

Do sealants hurt?

No. The tooth is cleaned, dried, conditioned with a gel for a few seconds, then the sealant is painted on and hardened with a light. There is no drilling and no injection. The whole thing takes a couple of minutes per tooth.

How long do dental sealants last?

Typically five to ten years. They are checked at each routine exam and can be touched up or replaced if they chip or wear. A partly worn sealant still protects the grooves it covers.

Has Your Child Got Their Six-Year Molars Yet? Ask Us

Those first permanent molars arrive quietly, and sealing them early is one of the highest value few minutes in a child dental care. We check for them at every visit and will tell you when the timing is right. Contact us to set up a consultation for your family.

Lovik Mirzaeian, DDS has achieved extensive training in multidisciplinary dental treatments. His credentials include Dental Implants, Cosmetic Dentistry, Full Mouth Reconstruction, Endodontics, Oral Surgery, Orthodontics, and Sleep Sedation. Our office puts your comfort and smile first, and we are dedicated to giving you top-notch dental care. Get ready to show off your perfect smile!

Looking for a trusted family dentist in Clovis? Dr. Mirzaeian welcomes new patients of all ages.