Method for preparing multistage micron structure on titanium implant surface

Abstract

The invention discloses a method for preparing a multistage micron structure on a titanium implant surface and relates to a titanium implant. The method includes polishing the titanium implant surface, performing oil removing treatment, and cleaning; subjecting the titanium implant which is subjected to the oil treatment and cleaning to acid dipping treatment in a mixed solution containing a nitric acid, a hydrofluoric acid and hydrogen peroxide; subjecting the titanium implant surface to sand blasting treatment; cleaning the titanium implant which is subjected to the sand blasting treatment; subjecting the cleaned titanium implant to acid etching post-treatment in an acid etching solution; and subjecting the titanium implant to heat treatment and cooling the titanium implant to the normal temperature to obtain the titanium implant with the surface in the multistage micron structure. According to the method for preparing the multistage micron structure on the titanium implant surface, the contact area between the titanium implant and bone tissues is increased, osteoblast ingrowth is facilitated, and thereby the forming of bone closure is facilitated; processing devices are easy to obtain, the operation process is simple, the environmental pollution is small, and the industrialization is easy to achieve; and the appearance is abundant, and the hydrophilic performance is excellent.

Description

technical field [0001] The invention relates to a titanium implant, in particular to a method for preparing a multi-level micron active surface on the surface of the titanium implant. Background technique [0002] Titanium and its alloys have good mechanical properties, such as high strength, low elastic modulus, and the elastic modulus is close to bone, which can effectively inhibit stress shielding and avoid local bone resorption. At the same time, the surface has good chemical stability and Biocompatibility makes it widely used in plastic surgery, dentistry and other fields, such as artificial bone, artificial joint, bone nail, dental titanium implant, etc. Clinical studies have shown that surface topography and composition play a crucial role in the short-term loading and long-term stability of titanium implants after implantation in the human body. At present, commercialized products in the domestic and foreign markets, such as Nobel Replace, can obtain a volcanic poro...

AI Technical Summary

Problems solved by technology

However, the concentrations of hydrochloric acid and sulfuric acid used are relatively large, which will inevitably cause a large amount of volatilization of hydrochloric acid at higher temperatures, causing environmental pollution. At the same time, the cost of double acid etching is complicated and expensive.

Chinese patent CN200910248898.3 discloses "a method for preparing a porous structure on the surface of a pure titanium dental implant". The temperature is 40-70°C, the temperature is not high so that the volatilization of hydrochloric acid is relatively small, but it can only produce surface depressions formed by sandblasting on the surface

[0004] Since most of the documents and patents contain hydrochloric acid in the acid etching solution on the titanium acid etching surface, it is easy to produce a large amount of volatilization when acid etching treatment is performed at a higher temperature, which can cause great corrosion to the production plant and equipment, and also damage to the health of the operator

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