Why Hydroxyapatite Is the Smarter Choice for Sensitive Teeth
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Time to read 5 min
The sensitivity problem most people just accept
Tooth sensitivity affects roughly one in three adults at any given time. That sharp, sudden pain when you drink something cold, breathe in cold air, or press a toothbrush against your gumline, most people assume it's just something to manage, not solve.
The standard answer from the toothpaste aisle has been fluoride-based desensitising formulas. They work, to a degree. But the science has moved on and the results are hard to ignore.
44 clinical trials. One clear conclusion.
A 2023 peer-reviewed systematic review and meta-analysis published in Biomimetics set out to examine every available clinical trial on hydroxyapatite and tooth sensitivity. Researchers screened nearly 40,000 titles, ultimately identifying 44 published human clinical trials that met rigorous inclusion criteria — with more than half rated as high quality by GRADE scoring standards. nih
That scale matters. A single study can be an outlier. Forty-four trials, conducted across multiple countries, age groups, and product formats — toothpastes, gels, professional in-office treatments, even chewing gum — represent a body of evidence that's difficult to argue with.
The results were consistent: HAP significantly reduced dentin hypersensitivity compared to placebo by 39.5%, and outperformed fluoride by 23% in controlling sensitivity. The researchers concluded that HAP is a more effective agent than fluoride in controlling dentin hypersensitivity and may be superior to other desensitising agents. nih
Across all 44 trials, only one failed to show a statistically significant clinical benefit from hydroxyapatite. Every other study — regardless of format, concentration, country of origin, or application method — pointed the same direction.
What those trials actually tested
The breadth of the evidence is worth understanding. The 44 trials covered:
- At-home toothpaste used twice daily over periods ranging from one week to six months
- Professional in-office single applications
-Post-bleaching sensitivity treatment
- Patients recovering from periodontal therapy
- Children with hypomineralised teeth (MIH)
- Comparisons against fluoride, strontium chloride, arginine, and other leading desensitising agents
In every category, hydroxyapatite performed as well as or better than the alternatives. That's not a niche result for one type of patient or one type of product it's consistent across the full spectrum of clinical scenarios where sensitivity is a problem.
Why hydroxyapatite works differently
Most sensitivity toothpastes try to numb the nerve signal. Hydroxyapatite works on the source of the problem instead.
Sensitivity typically results from exposed dentin, the layer beneath enamel where tiny tubules connect directly to the nerve. When fluid moves through those tubules in response to cold, heat, or pressure, it triggers pain. See Image
Hydroxyapatite particles are small enough to physically occlude those tubules. Over time and with regular use, they don't just block the entrance they contribute to remineralisation deeper within the tubule, creating lasting relief rather than a temporary mask.
Both intact hydroxyapatite molecules and ions released during use contribute to remineralisation of the dentin surface, producing long-term reduction in hypersensitivity.
Fluoride-free and effective
For people seeking a fluoride-free routine without compromising on results, this matters. The evidence isn't that hydroxyapatite is a compromise it's that it performs better.
Peg Paste is formulated with pharmaceutical-grade micro-hydroxyapatite, the same class of HAP studied across these clinical trials. Every brush supports the remineralisation process your teeth are designed to complete on their own just with better ingredients to do it.
The bottom line
Sensitivity isn't something you have to accept. And the solution doesn't have to come from a legacy formula built around fluoride. The science supporting hydroxyapatite is peer-reviewed, substantial, and clear.
Your teeth are made of hydroxyapatite. It makes sense that the best thing for them is more of the same.
Why this matters
The science on hydroxyapatite has been building since the late 1980s. What started with early studies in Japan and Germany has grown into a body of evidence including systematic reviews, meta-analyses, and randomised controlled trials across multiple countries and age groups.
This is exactly why Peg Paste is built around micro-hydroxyapatite. Not as a trend ingredient. Not as a marketing claim. But because four decades of international clinical research points clearly in this direction.
REFERENCES
Source: Limeback H., Enax J., Meyer F. Clinical Evidence of Biomimetic Hydroxyapatite in Oral Care Products for Reducing Dentin Hypersensitivity: An Updated Systematic Review and Meta-Analysis. Biomimetics. 2023;8(1):23.
ncbi.nlm.nih.gov/pmc/articles/PMC9844412
Amaechi et al., 2021 — BDJ Open (Nature) https://www.nature.com/articles/s41405-021-00080-7
Vano et al., 2014 — Quintessence International https://www.quintessence-publishing.com/gbr/en/article/842444
Orsini et al., 2010 — Journal of Clinical Periodontology https://onlinelibrary.wiley.com/doi/10.1111/j.1600-051X.2010.01558.x
Ehlers et al., 2021 — Oral Health & Preventive Dentistry https://www.quintessence-publishing.com/gbr/en/article/948955
This article is an editorial summary of a publicly available peer-reviewed clinical trial. It does not constitute dental or medical advice, and makes no therapeutic claims about any specific product. The research summarised was conducted independently of Peg Paste. Individual results may vary. Always consult a qualified dental professional for personal oral health advice. Peg Paste Pty Ltd, Noosa Heads QLD Australia.
WHAT IS HYDROXYAPATITE?
Hydroxyapatite is a restorative mineral that occurs naturally in teeth and bones. Hydroxyapatite works to repair, remineralise and strengthen the tooth’s outer layer, acting as a buffer to help prevent mineral loss, tooth erosion, tooth sensitivity and plaque.
HOW DO PREBIOTICS SUPPORT ORAL HEALTH?
Prebiotics support oral health by promoting the growth of beneficial bacteria, which can help maintain a balanced environment in the mouth. It is important to maintain good oral hygiene so harmful bacteria does not take over potentially leading to bad breath, cavities and disease.
WHERE IS PEG PASTE MADE?
Peg Paste is made and manufactured in Australia.
DO YOU USE MICRO-HYDROXYAPATITE OR REGULAR HYDROXYAPATITE?
We use micro-hydroxyapatite in our toothpaste and ensure that it fully complies with current SCCS (Scientific Committee on Consumer Safety) and Australian oral care and cosmetic regulations. We are aware of the European Union’s upcoming ban on nano-materials in cosmetics starting November 2025. The reason for this ban is still unclear, but reports suggest potential risks if nano-hydroxyapatite is used in high concentrations or in sprayable products, where inhalation could be a concern. Since our toothpaste is not a spray and is formulated with concentrations that are within safe guidelines, we remain confident in its safety and effectiveness.
IS PEG PASTE SUITABLE FOR CHILDREN?
Absolutely. Prevention is key when it comes to oral health, so why not instil healthy habits early. Children’s toothpaste normally consists of a lower level or no fluoride because of the greater risk of potential fluoride toxicity. Given Peg Paste is a natural, fluoride-free formulation, it is safe for junior toothypegs. We recommend children use a pea size amount and brush under adult supervision.
I HAVE SENSITIVE HEALTH, IS THIS PRODUCT SUITABLE FOR ME?
Science shows that Hydroxyapatite helps ease tooth sensitivity by filling in microscopic pathways to the nerves in the teeth. With fewer pathways exposed, the less sensitivity and discomfort you should feel to touch, food and temperature. Remember to always consult your dental professional for oral health advice and before trying new products.
I SUFFER FROM DRY MOUTH, IS THIS PRODUCT SUITABLE FOR ME?
Peg Paste does not contain Sodium Lauryl Sulfate or SLS, a common ingredient that acts as a thickener in toothpaste products. SLS can have negative, degenerative effects that can contribute to, or worsen serious oral health issues such as dry mouth, mouth ulcers, mouth irritation and bad breath. Changing to an SLS free toothpaste can make a difference if you’re experiencing these symptoms. Remember to always consult your dentist or dental hygienist for oral health advice and before trying new products.
