Synthetic hydroxyapatite is a new functional material used in many industries. It belongs to the advanced inorganic non-metallic mineral filling material with high performance in National Key New Materials First Application Demonstration Guide Catalogue (2017 edition). It is widely used in artificial bone, teeth and other bio ceramics, toothpaste, drinking water defluorination and polymer materials.

Characteristics of hydroxyapatite: white tasteless, safe and edible; strong binding with colorings, strong ability of adsorbing bacteria, significant anti-inflammatory and hemostatic effect, strong ability to inhibit harmful bacteria, high affinity with enamel and dentin, and strong anti-caries function.

Artificial synthesis of nano-hydroxyapatite originated from NASA. Minerals in astronaut's teeth and bones will lose under weightless environment. NASA uses synthetic hydroxyapatite as a means of recovery.