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A white powder surface with the word ‘Bioniq’ embossed on it, symbolising hydroxyapatite as a dental care ingredient.A white powder surface with the word ‘Bioniq’ embossed on it, symbolising hydroxyapatite as a dental care ingredient.

Strong enamel : Hydroxyapatite and artificial tooth enamel

Products for strong tooth enamel
Updated on 21/05/26Find out more
Editorially reviewed
Scientifically reviewed

Hydroxyapatite is the main component of our tooth enamel. It protects the teeth from irritants and damage. Over time, however, this tooth mineral wears away.  

By using artificial enamel – also known as biomimetic hydroxyapatite – in Bioniq dental care products, daily use can help support dental health and repair damaged enamel.

Definition : What is hydroxyapatite?

Hydroxyapatite is a mineral from the calcium phosphate group and is known for its very high degree of hardness. It is a component of our bones and teeth. While bones consist of around 60% hydroxyapatite, the hydroxyapatite content in our teeth is much higher.

Inside the tooth, the inner dentine is made up of around 70% of this mineral. The outer part, the tooth enamel, consists of around 97% hydroxyapatite, making it the hardest substance in our body. Hydroxyapatite provides strength and stability for our body and our teeth.

However, it is primarily the hydroxyapatite contained in tooth enamel that naturally wears away over time and cannot be reproduced by the body. 

Advantages : 3 key benefits of hydroxyapatite in dental care

The outermost layer of the tooth, the enamel, consists of 97% hydroxyapatite. This protects the underlying layers. Our bodies cannot repair worn-down enamel on their own. Using the principles of bionics, scientists have succeeded in creating artificial enamel that is very similar to human enamel.  

  • A diagram of a tooth, the left half of which appears matt and rough, whilst the right half looks smooth and shiny, with a blue outline around it.

    Repairs tooth enamel

    Micro-fine active ingredient repairs defects and forms a protective layer on the tooth with every brush, helping protect against acid attacks.

    Smoother teeth with daily use.

  • A graphic illustration of a tooth, the left half of which is yellowish and stained, whilst the right half is white, shiny and surrounded by a blue sheen, symbolising the fact that toothpaste containing hydroxyapatite whitens teeth

    Whiter teeth

    Hydroxyapatite adheres to the tooth, making it appear brighter. New stains find it difficult to adhere to the smooth tooth surface. 

  • An illustration of a tooth, the left half of which is reddened and criss-crossed with lightning bolts, whilst the right half is smooth, white and surrounded by a blue protective outline.

    Reduces tooth sensitivity

    Targeted repair and restoration of the tooth enamel protect the sensitive tooth necks. Exposed dentinal tubules are sealed, helping to reduce tooth sensitivity. Helps reduce sensitivity to hot and cold food.

    Enjoy hot and cold foods with greater comfort!

  • A black-and-white close-up of a tooth under a microscope, with a round seal bearing the words ‘Scientifically developed & tested’ and a microscope symbol in the foreground.

    Scientifically proven

    The active ingredient has been studied in just under 300 trials. The scientific findings clearly show that: 

    Hydroxyapatite helps keep your teeth and gums healthy!

Bionics : Hydroxyapatite from the field of bionics

Fortunately, thanks to advances and innovations in dental technology, tooth enamel can now be replicated. This so-called artificial tooth enamel is bionic or biomimetic hydroxyapatite and is based on the principles of bionics.  

The term ‘bionics’ describes the combination of biology and technology. It involves applying a natural phenomenon to a technical system. This concept has already been successfully applied to many everyday objects: 

  • The camera lens is modelled on the human eye 

  • The water- and dirt-repellent lotus effect  

  • Helicopters are inspired by the flight of dragonflies 

These are just a few of the many examples from the field of bionics. Nature is a popular model because we know it works. Some of these systems have stood the test of time over thousands of years and have prevailed through evolution. Our dental care products containing hydroxyapatite are another successful example! 

Protective function: Why is tooth enamel important?

Tooth enamel has to withstand a lot: eating, drinking, chewing and other external factors, such as teeth grinding, put it under daily strain.  

The high resistance of tooth enamel protects the underlying layers of the tooth from wear and tear. However, it is itself gradually worn down by constant stress. Calcium and phosphate in saliva can at least partially protect and remineralise the tooth enamel. 

If the enamel is damaged, it becomes rough and porous. Bacteria can attach more easily and the risk of dental diseases, which in the worst case can lead to tooth loss, increases. At the same time, this wear makes the teeth appear more yellow. It also protects the tooth from demineralisation caused by acids that are produced after eating as a breakdown product of sugar.

Enamel wear: How does tooth enamel wear away?

Tooth enamel is naturally subject to wear and tear and gradually wears down over time, for example through chewing food. However, this is a very slow process. On the other hand, there are also additional factors that can encourage tooth enamel loss and therefore contribute to premature wear:

A glass containing a yellow drink, ice cubes, lemon slices and fresh mint, symbolising how an acidic diet can cause tooth enamel erosion

Nutrition

Acidic foods and drinks are consumed more frequently these days. These changes in eating and drinking habits attack tooth enamel, thereby accelerating its breakdown.

A man and a woman are brushing their teeth together; both are holding a toothbrush, symbolising how incorrect brushing technique can lead to enamel erosion

Toothbrushing technique

Brushing too hard or using a toothbrush with stiff bristles can damage the enamel and, over time, contribute to its wear and tear.

Close-up of an open mouth during a dental examination; an instrument is pointing at the teeth and gums, symbolising plaque as the cause of enamel erosion

Plaque

Plaque is a build-up of bacteria and food debris on the teeth. If it is not removed regularly, acids are produced which attack and demineralise the tooth enamel.

A person wearing blue gloves is holding a dental model and placing a transparent mouthguard on it to illustrate how teeth grinding can lead to enamel erosion

Teeth grinding

Teeth grinding, which usually occurs at night and is unconscious, subjects the tooth enamel to intense pressure and friction, causing the tooth structure to wear away gradually.

Enamel protection : Protect your tooth enamel with toothpaste

Unlike hair and fingernails, which grow back throughout a person’s lifetime, tooth enamel does not regenerate on its own. Numerous studies by dental care products containing biomimetic hydroxyapatite – also known as enamel’ – and that micro-fine defects are repaired. 

Hydroxyapatite is produced in the laboratory and has properties similar to those of the basic building blocks of natural tooth enamel. Because it closely matches the structure of natural tooth enamel, the artificial tooth enamel (hydroxyapatite) bonds with the tooth surface. The teeth immediately feel smoother. 

  • The microcrystalline structure of hydroxyapatite adheres directly to the surface of the enamel whilst brushing. This allows even the tiniest cracks and porous areas in the enamel to be repaired. 

Various dental care products from Dr. Wolff’s Bioniq, including toothpaste, dental milk and special variants for gum protection and sensitive teeth, arranged against a light background.

By using Bioniq® dental care products regularly: 

  • the teeth feel smoother, as fewer bacteria can settle on the tooth surface 
  • make the teeth look brighter 
  • reduces the build-up of plaque and supports overall oral health 
  • teeth are less sensitive to cold, hot, sweet or sour foods and drinks 

Toothpaste for tooth enamel : Bioniq products featuring artificial tooth enamel

Knowledge : Other topics

  • A smiling mouth with white teeth, alongside a magnified close-up of the tooth surface with a scale, showing the smooth texture of the enamel as a symbol of the build-up of enamel with toothpaste

    Building up tooth enamel – how to protect your teeth

    Verified by Dr. Joachim Enax and Karoline Bauch

    Tooth enamel is the hardest substance in the human body – but it wears away over time. Find out what causes tooth enamel to break down, why it doesn’t regenerate on its own, and how the right toothpaste can repair minor defects.

  • A person in a white T-shirt is holding their cheek with their hand – a typical gesture when one’s teeth are sensitive.

    Sensitive teeth – causes and what really helps

    Verified by Dr. Joachim Enax and Karoline Bauch

    Hot coffee, cold ice cream, sour apples – and suddenly that sharp pain. Find out why teeth are sensitive, what causes it, and what you can do to specifically reduce this sensitivity.

  • A woman looks in the bathroom mirror and sees her bleeding gums as a sign of gum disease

    Bleeding gums – what causes it?

    Verified by Dr. Joachim Enax and Karoline Bauch

    Healthy gums do not bleed. Find out what causes bleeding gums, when you should see a dentist, and how you can prevent it with the right care.

Dr. Joachim Enax

Senior Scientist Oral Care

Dr. Joachim Enax is an expert in biomimetic oral care and oral health. As a PhD chemist, he is an experienced scientist in the research and development of innovative active ingredients for oral care and in promoting dental health. He is the author of numerous scientific publications in the field of teeth and oral care.

Scientifically reviewed
Verified on 21/05/26

Karoline Bauch

Corporate Communications Officer

Karoline Bauch is an expert in science communication specialising in the Oral Care sector and acts as the editorial contact for all matters relating to dentistry, oral health and prevention.

Editorially reviewed
Verified on 22/04/26