HYDROXYAPATITE AND CALCIUM CARBONATE COMPOSITE FOR BONE DEFECT FILLING IN PLASTIC SURGERIES

摘要

FIELD: medicine.;SUBSTANCE: invention represents a hydroxyapatite and calcium carbonate composite containing 20 to 80 wt % of calcium carbonate and compactly heat-setting (apparent porosity less than 2-4 %) at temperatures to 720°C. Using a potassium carbonate and sodium carbonate additive in an amount ranging within 10 % to 100 % related to the major ingredients (hydroxyapatite and hydroxyapatite carbonate and calcium carbonate) prevents thermal baking decomposition of a ceramic material and enables producing a fine-crystalline structure of chip size less than 500 nm and high compression strength 100 to 330 MPa.;EFFECT: composite material differs by high biological resorbing ability ensured by observed resorbed phases of hydroxyapatite carbonate and calcium carbonate.;1 tbl, 4 ex