Preparation technique of zirconium radical surface porous nano zirconium oxide biologically active coating

Abstract

The invention discloses a process for preparing zirconium surface porous nanometer zirconia biological activity coat. The porous nanometer zirconia biological activity coat is directly produced by micro-arc oxidation treating zirconium and zirconium alloy under high pressure using impulsing power source, with water solution containing calcium and phosphorous as electrolytic solution. The produced nanometer zirconia biological activity coat comprises tetragonal zirconia with the thickness of more than 40 mum and porous nanometer crystal structure, without interface between based bodys, accordingly it has high bonding strength, good tenacity and elastic modulus adjacent to sclerotin, bone apatite formed by inducing in similar body fluid has good biological activity usable as biological activity surface layer of zirconium medical implant.

Description

technical field

[0001] The invention relates to the composition and preparation technology of a novel bioactive coating on the surface of zirconium-based medical implants (such as zirconium and zirconium-titanium alloy dental implants and bone implants), in particular to a porous nano-zirconia bioactive coating material and its micro-arc oxidation preparation process. Background technique

[0002] Zirconium and zirconium alloys have sufficient strength and toughness and excellent biocompatibility, and their elastic modulus is lower than that of conventional medical metal materials such as titanium alloys and cobalt-chromium-molybdenum alloys, which can reduce the difference in elastic modulus between the implant and cortical bone. Match-induced stress shielding and bone resorption. Zirconium and its alloys have been applied in the fields of pins, screws, and cranial plates in surgery and dentistry, and can also be used as bone and joint implants. Bo...