Medical absorbable Mg-Si alloy

A technology of magnesium alloy and weight percentage, which is applied in the field of medical absorbable Mg-Si magnesium alloy, can solve the problems of insecurity and human health hazards of aluminum elements, achieve the best mechanical properties and corrosion resistance, benefit human health, improve The effect of strength and hardness

Inactive Publication Date: 2010-02-17
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research on medical titanium alloys has shown that aluminum can be harmful to human health
Therefore, magnesium alloys containing aluminum are not safe for the human body

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] By weight percentage, Mg-Si alloy was obtained according to the above-mentioned melting method, wherein Si was 0.8%. According to the above mechanical performance test, its tensile strength is 220MPa, and its plasticity is 8%. According to the above electrochemical polarization test, the corrosion current density is: 8.624×10 -6 A / cm 2 .

Embodiment 2

[0036] In terms of weight percentage, a Mg-Si alloy is obtained according to the above-mentioned melting method, wherein Si is 3%. According to the above mechanical property test, its tensile strength: 250MPa, plasticity is 3%. According to the above electrochemical polarization test, the corrosion current density is: 7.2×10 -6 A / cm 2 .

Embodiment 3

[0038] In terms of weight percentage, a Mg-Si alloy was obtained according to the above-mentioned smelting method, wherein Si was 0.8% and Ca was 0.5%. According to the above mechanical property test, its tensile strength is 238MPa, and its plasticity is 8%. According to the above electrochemical polarization test, the corrosion current density is: 6.6×10 -6 A / cm 2 .

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Abstract

The invention relates to a biologically absorbable magnesium alloy applied to medical implant materials and particularly suitable to be used as a corrodible and degradable bone implant material and adegradable scaffold material under human body environment. The biologically absorbable magnesium alloy comprises the following components in percentage by weight: 0.5 to 5.0 percent of silicon (Si) and the balance of magnesium (Mg), and possibly comprises a small amount of microelements such as manganese (Mn), calcium (Ca), rare earth (RE) and yttrium (Y); and the content of each microelement is not more than 1.5 percent, and the total content of the microelements is not more than 2.0 percent. The material has good biological compatibility and mechanical property, and has application value inthe medical field, such as intravascular interventional treatment of scaffolds, absorbable bone fixing instruments such as bone pegs, bone lammelae and the like.

Description

technical field [0001] The invention relates to a medical absorbable Mg-Si magnesium alloy, which is suitable as an implant material used in human body environment. The invention designs a magnesium alloy which is particularly suitable as a corrodible and degradable bone implant material and a degradable bracket material used in the human body environment. Background technique [0002] In medical bone repair and bone implant materials, stainless steel, titanium and titanium alloys have become widely used materials due to their excellent mechanical properties, biocompatibility and corrosion resistance. However, the mechanical properties of stainless steel and titanium alloys do not match those of bone tissue, especially the elastic modulus. For example, the elastic modulus of stainless steel is about 200GPa, that of titanium alloy is about 100GPa, and that of bone tissue is about 10 -40GPa, so the implant bears almost the entire load. This creates "stress shielding" during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00
Inventor 张二林杨柯
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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