METHOD OF FORMATION OF NANOSTRUCTURED BIOLOGICALLY INERT COATING ON TITANIUM IMPLANTS Russian patent published in 2016 - IPC C23C8/10 B82B3/00 B82Y5/00 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely technology of making bioinert nanostructured oxide coating on intraosseous parts of titanium implants. Method includes air-abrasive treatment, etching in solution of acids and gas-thermal oxidation. Air-abrasive treatment is carried out with alumina powder with particle size of 100-200 mcm at pressure of air medium 0.2-0.3 MPa. Etching of implant is performed in water solution of HF (5-8 wt%) + HNO₃ (15-19 wt%) for 0.1-0.2 minutes. Gas-thermal oxidation is performed by induction of heating in air atmosphere to temperature of 800-900 °C at current frequency on inductor of 90±10 kHz and specific consumption of electric power 0.2-0.4 W/kg. Then implant is held for 0.5-2 minutes and cooled in air.

EFFECT: formation of oxide coating on titanium implant surface with thickness of 3-10 mcm is provided, which consists of oxide crystals with size of up to 70±10 nm, with help of high-efficiency and resource-saving method.

3 cl, 3 dwg, 2 ex