AMORPHOUS CARBONIZED AND FLUORINATED HYDROXYAPATITE FOR TOOTH PASTE AND METHOD FOR ITS OBTAINING Russian patent published in 2002 - IPC

FIELD: medicine, stomatological technologies. SUBSTANCE: the suggested hydroxyapatite includes a synthesized material of hydroxyapatite structure. Additionally, it contains both carbonate and fluorine groups in accordance with the following formula: Ca₁₀(PO₄)₆(OH)_2-x-y(CJ₃)_x/2, where X=0.01-0.3; Y= 0.01-0.4 at slow-velocity neutralization at inert atmosphere of calcium hydroxide water solution by the mixture of orthophosphoric and hydrofluoric acids at 8-10 C in case of separate and continuous introduction of Ca(HCO₃)₂, into reaction solution. Samples for ready-to-use product quality control are prepared at inert atmosphere due to drying and subsequent high-temperature annealing. Material is completely compatible with human body tissues. According to its chemical composition it is similar to that of human tooth enamel and is used as a composition for tooth pastes. EFFECT: higher efficiency. 2 cl, 2 ex, 1 tbl _