Posted by David Chotiner
on April 14, 2026
Patients ask me this question more than almost any other: "Should I use hydroxyapatite or fluoride?" The short answer is that both work. The longer answer — the one that actually helps you decide — requires understanding how differently they work.
I'm Dr. Dave Chotiner. I've been practicing dentistry for over 25 years, and I use fluoride in my practice every day. I also formulated RevitaBite around nano-hydroxyapatite. Those aren't contradictions. They're tools with different jobs.
What fluoride actually does
Fluoride doesn't "add minerals" to your teeth. It converts the mineral that's already there. When fluoride ions reach your enamel, they swap into the crystal structure and form a new, slightly different mineral called fluorapatite. Fluorapatite is more resistant to acid attack than the original hydroxyapatite your teeth were made of. That's why fluoride lowers cavity rates — it's making your existing enamel harder to dissolve.
This is a well-established, safe mechanism. Community water fluoridation is one of the most studied public health interventions in history. In my practice, I use fluoride varnishes and prescription-strength rinses for patients at elevated cavity risk, and I'll continue to.
What hydroxyapatite actually does
Hydroxyapatite is the mineral your enamel is already made of — roughly 97% of it. When you deliver nano-sized hydroxyapatite particles to your tooth surface, they can integrate directly into microscopic surface damage. Not by converting what's there. By replacing what's been lost.
Japan approved nano-hydroxyapatite as a cavity-preventive ingredient in 1993. The peer-reviewed research since then — including randomized clinical trials — has shown it's comparable to low-concentration fluoride for early-stage enamel remineralization. Not "pretty good for a natural alternative." Statistically comparable.
Who should use which?
Use fluoride if: you're at elevated cavity risk, have a history of decay, or your dentist has recommended prescription-strength fluoride. It's the gold-standard intervention for active caries risk.
Use hydroxyapatite if: you want enamel support without fluoride (for any reason), you have sensitivity, you're post-whitening, or you're looking for an ingredient that works between brushing — which is the specific problem I designed RevitaBite to solve.
Use both? Absolutely. There's no clinical reason they can't coexist. A fluoride toothpaste at night plus RevitaBite after meals is a reasonable routine for many patients.
The honest bottom line
Fluoride isn't bad. Hydroxyapatite isn't a gimmick. The question isn't which is "better" — it's which problem you're trying to solve. For most of my patients, the gap in their oral care isn't the 4 minutes of brushing. It's the 20+ hours between. That's where hydroxyapatite, delivered continuously while you chew, does something nothing else can.
FAQ
Is hydroxyapatite safer than fluoride?
Both are safe when used as directed. Hydroxyapatite has no dosage ceiling because it's the mineral your body already uses — swallowing it isn't a concern. Fluoride requires more care with young children.
Does hydroxyapatite actually remineralize cavities?
It remineralizes early-stage enamel damage (white spot lesions, microscopic surface loss). Neither hydroxyapatite nor fluoride can repair a fully formed cavity — those need a dentist.
Can I use both?
Yes. They're complementary, not competing.
Why doesn't RevitaBite contain fluoride?
Because a chewing gum isn't the right delivery vehicle for fluoride. The dose would be either too low to matter or high enough to worry about. Hydroxyapatite doesn't have that problem.
Last medically reviewed by Dr. David Chotiner, DDS on April 6, 2026.
