Fluoride has decades of research and the backing of major dental associations. Hydroxyapatite is a newer, fluoride-free option with promising results, including an 18-month trial where it matched fluoride toothpaste for preventing cavities in adults. Here's how they compare, side by side.
Key takeaways
- Both help protect enamel, in different ways: fluoride makes enamel more resistant to acid; hydroxyapatite supplies the same mineral enamel is made of.
- A 2023 randomized trial found 10% hydroxyapatite toothpaste was not inferior to 1,450 ppm fluoride toothpaste for cavity prevention in adults over 18 months.
- The ADA and pediatric dental groups still recommend fluoride toothpaste, especially for people at high cavity risk and for children.
- Some people use both: hydroxyapatite at one brushing, fluoride at the other. Ask your dentist what suits you.
Hydroxyapatite vs. fluoride at a glance
| Hydroxyapatite | Fluoride | |
|---|---|---|
| What it is | Calcium phosphate, the main mineral in tooth enamel | A mineral ion (as sodium fluoride, stannous fluoride or MFP) |
| How it works | Particles fill tiny surface defects and support remineralization | Forms more acid-resistant fluorapatite and slows enamel breakdown |
| Evidence | Growing; fewer large trials | Extensive, over decades |
| Dental association position | No ADA Seal; not yet in US guidelines | Recommended by the ADA |
| Safety review | EU SCCS: nano form safe in toothpaste up to 10% | Safe at toothpaste levels; children should use a small amount and not swallow it |
| Who often chooses it | People who prefer fluoride-free products | Most people, and anyone at high risk of cavities |
What the research says
The strongest head-to-head evidence is the 2023 Paszynska trial in Frontiers in Public Health: adults brushed with either 10% hydroxyapatite or 1,450 ppm fluoride toothpaste for 18 months, and hydroxyapatite was found non-inferior for preventing new cavities. It's one trial, so it doesn't overturn the much larger body of fluoride research, but it's the reason many dentists now see hydroxyapatite as a reasonable fluoride-free option.
Which should you use?
- Choose fluoride if you've had several cavities, have dry mouth, wear braces, or your dentist recommends it.
- Hydroxyapatite is a reasonable option if you want fluoride-free, prefer an ingredient that's not a concern if swallowed, or want to add it alongside fluoride.
- For kids, follow your child's dentist. Pediatric groups recommend fluoride toothpaste in age-appropriate amounts. See fluoride-free toothpaste for kids.
Hydroxyapatite toothpaste we stock
We stock 22 hydroxyapatite products, including tubes, toothpaste tablets, mouthwash tablets and mints. Popular picks include Chomp, Tidalove and Kaylaan. See them all in hydroxyapatite toothpaste, or read our full hydroxyapatite toothpaste guide with every product compared. We don't currently sell fluoride toothpaste.
FAQ
Is hydroxyapatite as good as fluoride?
One 18-month trial in adults found 10% hydroxyapatite toothpaste worked as well as fluoride toothpaste at preventing cavities. Fluoride still has far more evidence behind it.
Can I use hydroxyapatite and fluoride together?
Yes. Some people alternate them, or use a hydroxyapatite toothpaste with a fluoride mouthwash. Ask your dentist.
Is hydroxyapatite safe to swallow?
Hydroxyapatite is the mineral teeth and bones are made of, and the EU's safety committee found the nano form safe in toothpaste at up to 10%. Toothpaste still isn't meant to be swallowed.
Why doesn't hydroxyapatite toothpaste have the ADA Seal?
The ADA Seal for cavity-prevention toothpaste currently requires fluoride.
Sources: Paszynska et al., Frontiers in Public Health (2023); European Commission SCCS, Hydroxyapatite (nano); ADA, Toothpastes.
This guide is general information, not medical advice. Patch-test new products and ask a dermatologist or doctor about skin or health concerns.
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