When I graduated from dental school, the toothpaste aisle was relatively small. Now, there are countless options and it's confusing.
As an orthodontist, I get asked this question all the time:
“Is fluoride required, or is nano-hydroxyapatite a great alternative?”
Let’s break it down simply.
What fluoride does
Fluoride has been the standard in dentistry for decades.
It works by:
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Strengthening enamel
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Helping prevent cavities
There’s strong evidence that fluoride reduces cavity risk, which is why it’s widely recommended by organizations like the American Dental Association (ADA) and Centers for Disease Control and Prevention (CDC).
What nano-hydroxyapatite (nHAP) does
Studies have shown that nano-hydroxyapatite is as effective as fluoride in preventing cavities, while also directly repairing enamel.
In fact, it’s actually what your teeth are made of.
Your enamel is primarily composed of hydroxyapatite.
Nano-hydroxyapatite works by:
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Rebuilding and reinforcing enamel
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Fills in microscopic weak spots
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Smoothing the tooth surface
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Supporting natural whitening
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Helping reduce sensitivity
The key difference
Here’s the simplest way to understand it:
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Fluoride helps protect enamel
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Nano-hydroxyapatite helps rebuild enamel
Both support remineralization—but they do it in different ways and both help prevent cavities.
What I tell my patients
In my practice, I see a wide range of patients—kids, teens in braces, and adults.
Here’s how I think about it:
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Fluoride is well-established and effective
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Nano-hydroxyapatite is especially great for enamel repair and sensitivity
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Many families today are looking for fluoride-free options
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Both are equally effective for preventing cavities
Nano-hydroxyapatite is great for patients who:
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Prefer fluoride-free products
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Have sensitivity
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Want to focus on enamel rebuilding
While there are lots of choices when it comes to toothpastes with nano-hydroxyapatite, I usually recommend Pearl Pop to my patients because it makes brushing fun so kids brush more often. Since Pearl Pop is in a gummy-like form, it will stick to your teeth and the nano-hydroxyapatite can work even longer. You can spit, but don’t rinse after brushing.
Still not sure which is right for you?
→ Take this 30-second quiz to get a personalized recommendation based on your goals
Why this matters for kids
Getting kids to brush consistently is half the battle.
What I often see:
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Kids resist strong mint flavors
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Foam can feel overwhelming
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Brushing becomes a daily struggle
When brushing becomes easier and more enjoyable, consistency improves—and that’s what really protects teeth long-term.
What I personally recommend
The “best” toothpaste is ultimately the one your family will use consistently and that helps prevent cavities.
That said, I look for:
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Ingredients that support enamel health
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A brushing experience people will stick with
Final thoughts
Fluoride isn’t “bad.” Nano-hydroxyapatite isn’t just a trend.
They’re simply equally good approaches to protecting your teeth.
The right choice depends on:
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Your preferences
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Your needs
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What you’ll actually use every day
The most important thing is that your toothpaste contains fluoride or nano-hydroxyapatite. You need one of those two ingredients to protect your teeth.
If you’re looking for a more natural or clean toothpaste without fluoride, you should definitely make sure you are using one with nano-hydroxyapatite.
FAQ (Quick Answers)
Is nano-hydroxyapatite better than fluoride?
Not necessarily better—just different. It may be especially helpful for enamel repair and sensitivity.
Is fluoride safe?
Fluoride is considered safe as well as effective when used as directed and when not consumed in large doses by kids.
Can nano-hydroxyapatite rebuild enamel?
It can help repair and remineralize early enamel damage.
Is nano-hydroxyapatite safe for kids?
Yes, it is considered safe and is often used in fluoride-free formulations.
Still not sure which is right for you?
→ Take this 30-second quiz to get a personalized recommendation based on your goals
And if you're struggling to get your kids to brush...
→Check out our Co-Founder Kimber Crandall's (a mom of four) tips on how to make brushing teeth easier
Dr. Mark H. Holt is a nationally recognized orthodontist with more than 30 years of clinical experience specializing in advanced orthodontic care, including clear aligner treatment and complex bite correction. He is the founder of Holt Orthodontics, a leading multi-location practice in Northern California known for delivering high-quality, patient-centered treatment.
Dr. Holt earned his Doctor of Dental Surgery degree from the University of California, San Francisco, followed by a Master of Science and advanced orthodontic training at the University of Oklahoma.
Throughout his career, Dr. Holt has remained at the forefront of orthodontic innovation. He has served as an Invisalign Faculty member, teaching other orthodontists across the country and lecturing in more than 40 cities on advanced treatment techniques and digital orthodontic planning. His practice has been recognized as a Top 1% Invisalign provider, reflecting both the volume and complexity of cases treated. Over the years, he has completed more than 10,000 cases with clear aligners.
Known for his patient-first philosophy, Dr. Holt approaches each case with the perspective of both a clinician and a parent—prioritizing long-term oral health, function, and confidence. His work has helped transform tens of thousands of smiles, with a focus on improving not just dental alignment, but on instilling confidence in every smile.