
Parents ask us this all the time: “Does my child need sealants or fluoride?” The short answer is that they do different jobs. Here’s how sealants vs fluoride stack up, and why many kids do best with both.
What a Sealant Does
Back teeth have deep grooves. Food and germs settle in them, and a toothbrush can’t always reach the bottom. That’s where many kids’ cavities start.
A sealant is a thin coating we paint over those grooves. It bonds to the tooth and keeps food out. There’s no drilling and no numbing. Our dental sealants take about 30 minutes for four back teeth.
Sealants usually go on when the first adult molars come in, around age 6, and again around age 12. They often last 5 to 10 years, and we check them at every cleaning.
What Fluoride Does
Fluoride is a mineral that helps make tooth enamel stronger. A stronger surface holds up better against the acid that causes cavities.
A fluoride treatment helps protect the whole tooth surface, not just the grooves. Sealants only cover the chewing surface of back teeth.
Side by Side
- Sealants guard the chewing surfaces of back teeth
- Fluoride helps protect every surface of every tooth
- Sealants block food and germs out of deep grooves
- Fluoride helps enamel stand up to acid
- Sealants last for years and get checked at every cleaning
Does Your Tap Water Have Fluoride?
This is worth checking. Some towns add fluoride to tap water, and some don’t.
Your water provider is the best place to find out. Every water utility has to give customers a yearly water quality report, and it includes fluoride levels. You can also look up your system with the CDC’s My Water’s Fluoride tool. In Rexburg, the city water system is run by the Public Works office, at 208-359-3020.
Bring what you find to your child’s visit, and we can talk it through.
What If You’d Rather Skip Fluoride?
Some parents prefer to avoid fluoride. That’s your call, and we respect it. We offer fluoride-free treatments, too.
If you skip fluoride, sealants matter even more. They protect the back teeth without any fluoride at all. Good brushing, flossing, and fewer sugary snacks help, too.
So, Which One Does Your Child Need?
For most kids, the answer is both. Sealants guard the grooves, and fluoride protects the rest. Dr. Craig Stout will look at your child’s teeth and X-rays and tell you what makes sense. He won’t suggest treatment your child doesn’t need.
Many dental plans cover sealants for kids, often in full. We’ll check your benefits before we start. We see kids ages 4 and up as part of our pediatric dental care.
Want to protect your child’s teeth? Call Family First Dental at (208) 400-9946 or book online. Saturday and evening visits are available.




