Hydroxyapatite and BioHAP – the teeth's protective shield

Hydroxyapatite is the hardest substance in the human body. This mineral forms the basis for teeth and bones.Dentine is made up of approx. 70% hydroxyapatite. At around 97%, the concentration in the overlying enamel is even greater. The crystal structure and the arrangement of the crystallites in the enamel result in the high fracture strength of our teeth.

As such, hydroxyapatite is of central importance when it comes to protecting the teeth and ensuring good dental health. Whilst the mineral is harder than gold, it is not indestructible. Our teeth are subjected to chemical and mechanical attacks on a daily basis, e.g., from acids in foods, tooth grinding and overzealous brushing. Over time, the minerals are released from the enamel and the tooth substance shrinks. This frequently results in sensitive teeth. Since hydroxyapatite is an anorganic substance, it cannot be recreated by the body.

Even though hydroxyapatite cannot be rebuilt by the body, it can be created artificially. BioHAP is the abbreviation for biomimetic hydroxyapatite. The principle of biomimetics describes the transfer of phenomena from nature to technology. A well-known example is the hook and loop fastener, which was inspired by the burdock plant genus and has become an integral part of our everyday life.

BioHAP is produced in laboratories and is very similar to the hydroxyapatite produced in our body. That's why, this substance makes a particularly interesting addition to dental care products such as toothpaste, mouth washes and gels.

The microcrystalline structure of BioHAP forms a protective layer on the tooth surface during dental care. Acids and bacteria find it harder to adhere to the tooth and thus firstly attack the applied protective layer and not the enamel directly.

BioHAP also counteracts tooth demineralisation by releasing calcium during bacterial acid attacks, this neutralises the acids and keeps the pH level in the mouth normal. The enamel is remineralised and caries is prevented.

Moreover, the BioHAP occludes exposed dentinal tubules which transmit external stimuli – such as cold, heat or acid – to the tooth nerve. BioHAP thereby works effectively to prevent sensitive teeth.

The effectiveness of BioHAP has been confirmed in numerous studies.