Method for preparing bioactive gradient film of fluor-hydroxyapatite

Abstract

The invention relates to a bioactive modification method of medical titanium materials, which is characterized by adopting a segmented micro-arc oxidation technology and directly in-situ forming a bioactive gradient film containing TiO2 / FHA / HA on the surfaces of titanium and titanium alloy. The method comprises the following steps: preparing electrolyte solution containing phosphate ions, calciumions and fluoride ions; taking the titanium material as an anode and stainless steel as a cathode; adopting a DC pulse power supply to carry out micro-arc oxidation on the titanium and titanium alloyin the manner of segmented oxidation. The bioactive gradient film containing TiO2 / FHA / HA prepared by the invention has good bioactivity and can apply the titanium to the field of dental restoration widely. The invention features simple process and lower cost, has no special requirements on material shapes, is particularly suitable for matrices with complex shapes and effectively expands the application range of the materials.

Description

Preparation method of fluorine-containing hydroxyapatite gradient bioactive film layer technical field The invention relates to a bioactivation modification method for medical titanium metal materials, in particular to a preparation method for a fluorine-containing hydroxyapatite gradient bioactive film layer used in dentistry. Background technique Titanium biomaterials are widely used in orthopedics and plastic surgery due to their high strength and toughness, good biocompatibility and corrosion resistance. However, since titanium metal is a biologically inert material, it cannot be chemically combined with the main body bone after being implanted into the human body, which seriously affects the implantation effect. Therefore, it is necessary to carry out biological activation modification on titanium metal. The preparation of bioactive ceramic films on the surface of titanium metal has become a research hotspot in surface modification of titanium metal in recent years. ...

AI Technical Summary

Problems solved by technology

It is disclosed that a bioceramic coating with titanium dioxide / fluorine-containing hydroxyapatite / hydroxyapatite gradient structure was prepared on the surface of titanium substrate pretreated by micro-arc oxidation by sol-gel method, and the results showed that the gradient bioactive coating significantly improved The coating-base bonding force is improved, and because the dissolution rate of fluorohydroxyapatite is lower than that of hydroxyapatite, the implant life is improved, but the gel shrinks during the later sintering process, and the production cycle is relatively long

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