Hydroxyapatite is also the most stable form of calcium phosphate, which means that it is unlikely to succumb to decomposition processes like oxidation. Hydroxyapatite, alkali type calcium phosphate, calcium is apatite (Ca5 (PO4) (OH) 3) natural mineralized. Base can be fluoride, chloride and carbonate ions, generate fluorine apatite or chloride matrix apatite, the calcium ions can be a variety of metal ions by ion exchange reaction, form the corresponding metal ions M apatite (M on behalf of replacing calcium metal ions).
