| 摘要 |
<p>The subject of the invention is a bioactive and photocatalytic coating on metal orthopaedic and dental implants and a procedure of its preparation. The coating based on titanium oxide is prepared by hydrothermal treatment of metal implants in an autoclave at a temperature of 100- 300 degrees Celsius for 6-96 hours in a saturated water solution of Ti, Ca, Mg, P, Si, Sr and Zn ions, having a pH value of 3 to 12. After the hydrothermal treatment, there is an up to 5 micrometres thick coating on a metal implant, based on titanium oxide in the form of anatase, the grains being of a pinacoid shape and containing essential microelements, the coating is firmly bound to the substrate, it is hydrophilic and photocatalytic and in irradiation by UV-light it decomposes organic and biological impurities or sterilizes the surface, forms hydroxyapatite on surfaces in a simulated body liquid and prevents direct contact of blood plasma with cytotoxic and allergenic metals, e.g. with aluminium and vanadium in Ti6Al4V. In this way the coating on the basis of titanium oxide, prepared by hydrothermal treatment of metal implants, accelerates and enhances the osteointegration of implants and reduces the later negative effect on the organism.</p> |
