Hydr-… oxy-… apatite. What is it?
Hydroxyapatite (HAp) is a naturally occurring mineral form of calcium apatite, predominantly found in our bones and teeth.
HAp is a natural alternative for fluoride that works differently but as well as fluoride in preventing dental decay. If fluoride creates a protective layer on enamel then hydroxyapatite acts as a filler, by restoring minute cracks and scratches on tooth surface.
Remineralization
Tooth enamel is constantly attacked by acids from bacteria and foods – a process known as demineralization. Saliva normally counteracts this by replenishing minerals, but if the amount of saliva secretion becomes inadequate, due to poor health, or due to excessive consumption of acidic foods, demineralization is prolonged, and remineralization by the saliva cannot keep up, making teeth more vulnerable to decay.
The most effective way to restore missing minerals is to replace them directly. Hydroxyapatite is missing, we replace it with Hydroxyapatite!
History of HAp
In 1972, a NASA scientist patented a precursor to hydroxyapatite for tooth repair. This innovation was driven by the need to address bone loss, a significant health concern for astronauts during a prolonged stay in zero gravity.
In 1974, a Japanese businessman, while exploring potential business opportunities, came across this NASA patent. After extensive research and testing, he launched the world’s first hydroxyapatite-based toothpaste in 1980 to treat dentin hypersensitivity and for caries prevention.
It was not until 2006 that the first toothpaste containing HAp as an alternative to fluoride was launched in Europe.
Over the years, HAp has become extremely popular in the natural health world, with countless brands releasing their own hydroxyapatite oral care products. Therefore also a number of systematic reviews and meta-analyses have been published on the use of hydroxyapatite in preventing oral health problems, proving its multiple benefits.
Benefits of hydroxyapatite:
- Natural remineralization: hydroxyapatite helps in the remineralization process, making it effective in strengthening teeth.
- Biocompatibility: HAp binds chemically to bone but is non-toxic and does not cause inflammation, reducing the risk of adverse reactions.
- Non-toxic: hydroxyapatite is natural and safe for long-term use.
- Reduction of dental hypersensitivity: HAp acts as a filler, by restoring minute cracks and scratches, thus reducing tooth sensitivity.
- Natural whitening: the mineral crystals in hydroxyapatite reflect light, creating a whitening effect that makes your smile look brighter and healthier without harsh abrasives or bleaching agents.
- Promotes a healthy oral microbiome: HAp inhibits the growth of harmful bacteria, reduces plaque formation, and balances the pH level in your mouth
What is nano-hydroxyapatite?
Nano (smaller) refers to the size of the hydroxyapatite particles. Logically we would assume that nano-sized particles should be more effective at remineralizing teeth because of their smaller size but….
The last few years there have been concerns about the potential side effects of using nano-particles in the mouth. To ensure the full safety of nanoparticles for human health, based on the European Commission’s directive, nHAp particles must be at least 100 nanometres long and not needle-like. Therefore, if we use these kinds of nanoparticles in cosmetic products, we risk that these particles penetrate the cells of the human body and cause genetic damage.
While research on nanoparticles is still ongoing, the European Union has accepted regulation (no 2024/858) with restrictions for nano-hydroxyapatite use in oral care in March 2024.
Fortunately, HAp does not necessarily have to be in the form of nanoparticles. It is also sufficient if the HAp is biomimetic. Biomimetic means that the synthesized material has chemical-physical properties that match those of the material found in the human body.
Taking all this into consideration, Fresmy has chosen biomimetic hydroxyapatite (that is not in the form of nanoparticles) in our toothpaste tablets, so our users’ teeth would benefit from this ingredient’s awesome properties.
When is hydroxyapatite a better choice?
If you are sensitive to fluoride
If you are sensitive to fluoride, using hydroxyapatite toothpaste tablets is a wise choice. The lack of fluoride reduces the risk of adverse reactions, making it an effective and safe alternative for maintaining oral hygiene.
If you are concerned that your children accidentally / intentionally swallowing fluoride toothpaste
For parents, hydroxyapatite provides peace of mind. Unlike fluoride, hydroxyapatite is non-toxic and safe if ingested, making it an excellent option for young children. This ensures your child’s oral hygiene routine is both effective and safe.
If you are pregnant
Pregnant women may consider switching to hydroxyapatite toothpaste to avoid potential fluoride exposure risks.
If you have concerns about your oral microbiome
Fluoride can sometimes disrupt the bacterial balance in the mouth, but hydroxyapatite helps support a healthy oral environment. It works without disturbing the beneficial bacteria.
If you live in areas with fluoridated water or water with a high natural fluoride content
Fluoride has long been known to be a very toxic substance, so you do not want to risk potential fluoride overexposure. To avoid it, it would be a good idea to consider switching to hydroxyapatite-based oral care. For example, there are still many areas in the USA where tap water is fluoridated. Higher natural fluoride levels have been measured also in western and central Estonia.
If you prefer a natural alternative
Hydroxyapatite is an excellent choice for individuals seeking a more natural oral hygiene product.
While fluoride has been a cornerstone of dental care for decades, hydroxyapatite offers a natural and equally effective alternative. Both fluoride and hydroxyapatite are scientifically proven to reverse dental decay—why not choose the less toxic one?
For those uncertain about which option to choose, it’s always best to consult with a dental professional to determine the most suitable solution for your specific situation.
Research used:
- Limeback L, Enax J, Meyer F. (2021). Biomimetic hydroxyapatite and caries prevention: a systematic review and meta-analysis.
https://pmc.ncbi.nlm.nih.gov/articles/PMC8641555/ - Chen, J. et al. (2024). Preventing Dental Caries with Calcium-Based Materials: A Concise Review.
https://www.researchgate.net/publication/384149527_Preventing_Dental_Caries_with_Calcium-Based_Materials_A_Concise_Review - Scientific Committee on Consumer Safety. (2021). Opinion on Hydroxyapatite (nano).
https://health.ec.europa.eu/system/files/2023-03/sccs_o_269.pdf - European Comission. (2011). Definition of a nanomaterial.
https://ec.europa.eu/environment/chemicals/nanotech/faq/definition_en.htm - Pepla et al. (2014). Nano-hydroxyapatite and its applications in preventive, restorative and regenerative dentistry: a review of literature.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4252862/