Fully absorbed mg-zn-ag system amorphous medical implant substrate, its preparation method and application

Abstract

The invention relates to a fully absorbed Mg-Zn-Ag based amorphous medical implant base material with strong corrosion resistance, high strength and good biocompatibility, and also provides its preparation method and application. The fully absorbed Mg The -Zn-Ag based amorphous medical implant substrate is made of a Mg-Zn-Ag amorphous alloy having the following composition consisting of the following composition in the following atomic percentages Composition: silver 0%-10%, and the silver content is not 0%, zinc 15%-40%, impurity 0%-5%, and the balance is magnesium. The fully absorbed Mg-Zn-Ag based amorphous medical implant substrate of the present invention has excellent mechanical strength and hardness, low gas release during use, and slow degradation rate in the human body, and is suitable as a biodegradable implant in the human body. Implant materials are used to prepare components, components or devices used in the diagnosis, treatment, and repair of living organisms, and are used to prepare artificial tissues and artificial organs that replace damaged tissues and organs of living organisms, etc., and have broad market application prospects .

Description

technical field [0001] The invention belongs to the field of magnesium-based amorphous alloy materials, and in particular relates to a fully absorbed Mg-Zn-Ag system amorphous medical implant substrate, a preparation method and application thereof. Background technique [0002] In modern biomedicine, some metals or alloys are often used as human implant materials, such as cardiovascular implant stents. The density and elastic modulus of magnesium and magnesium alloys are closer to those of human bone than other medical metal materials, and their mechanical properties are similar to those of human bones. As implant materials, they can effectively avoid or alleviate the force shielding effect and shorten the bone. tissue healing process. In addition, after being implanted into the human body, magnesium and magnesium alloys can be gradually absorbed and degraded by the human body with the recovery of the damaged tissue without the need for secondary surgery. tissue lesions. ...

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Problems solved by technology

[0003] 1) The standard electrode potential of magnesium is very low, it is easy to corrode, and cannot form an effective protective oxide film, especially the Cl in body fluids - It will accelerate the corrosion of magnesium alloys, causing the degradation rate of magnesium and magnesium alloys in the human body to be too fast, which will easily lead to premature loss of function of its implanted components before the injured tissue heals;

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