Corrosion-resistant high-toughness zinc-magnesium alloy implanting material capable of being absorbed by human body

Abstract

The present invention relates to a corrosion-resistant high-toughness zinc-magnesium alloy implanting material capable of being absorbed by human body. The alloy material comprises 96-99.998 wt% of Zn and 0.002-4 wt% of Mg. According to the present invention, the alloy material of the present invention is applied for the absorbable medical implant, particularly the vascular stent and the orthopedic implant (bone nail or bone plate and the like); the prepared zinc-magnesium alloy material of the present invention can be absorbed in the human body environment, such that the pain of the secondary surgery on the patient can be avoided; the corrosion resistance of the prepared zinc-magnesium alloy material is much higher than the corrosion resistance of the magnesium alloy, the degradation speed is substantially reduced, and the long-term mechanical support can be provided, such that the failure of the vascular stent, the bone nail and other implants in advance can be avoided; and the mechanical strength of the prepared zinc-magnesium alloy material is much higher than the mechanical strength of the polymer, and the prepared zinc-magnesium alloy material has characteristics of high toughness, easy manufacturing, good elastic modulus matching with human body, and simultaneous high corrosion resistance and high toughness achieving.

Description

technical field [0001] The invention relates to a fully degradable corrosion-resistant high-strength zinc-magnesium alloy implant material, which belongs to the technical field of medical materials. Background technique [0002] Vascular stent is an implantable wire mesh device used to treat coronary heart disease and other vascular diseases, with a length of about 8-23 mm and a diameter of about 2.5-5 mm. The current mainstream drug-eluting stent (Drug Eluting Stent, DES) provides mechanical support for stenotic blood vessels by expandable cobalt-chromium alloy wire mesh. Lymphocyte growth reduces inflammatory and immune responses. For a long time, Chinese patients have not understood the product of stents, because the incidence of coronary heart disease in my country was extremely low in the past. With the increase of national income year by year, the improvement of people's living standards and the change of diet structure, coronary heart disease has been rising rapidly...

AI Technical Summary

Problems solved by technology

However, the corrosion resistance of magnesium alloy is very poor, it will be degraded and absorbed soon in the human body, and cannot provide enough mechanical support time (service period)