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Biomedical degradable magnesium alloy bone nail and preparation method thereof

A biomedical and magnesium alloy technology, applied in metal processing equipment, manufacturing tools, used abrasive processing devices, etc., can solve the problems of implant treatment failure, high material cost, long treatment cycle, etc., and achieve the elimination of microscopic Pores and defects, simple preparation method, effect of improving stress corrosion resistance

Inactive Publication Date: 2020-07-28
东莞立德生物医疗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology relates to making medical implants made from materials resistant against wear caused by high levels of ionizing radiation (I) without losing their mechanical properties after being exposed for long periods of use. By removing any unwanted particles at this stage, these technical improvements make them more durably usable over longer times than previously possible due to reduced tendency towards breakage under repeated impact forces.

Problems solved by technology

This patents describes various technical problem addressed in this patented paper relating to improving the durability or resistance towards corrosive environments such as acids during surgery when making temporary plates made from metals like magnetically hardened iron-based sinterings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Pretreat the body of the magnesium alloy bone nail to remove surface impurities;

[0030] (2) Fix the main body of the magnesium alloy bone screw and rotate it, start the shot blasting machine to perform shot blasting on the main body of the magnesium alloy bone screw,

[0031] The body of the magnesium alloy bone nail is shot peened for the first time. The shot peening uses stainless steel shot with a hardness of 62HRC, the shot peening diameter is 0.6mm, and the shot peening time is 80 minutes;

[0032] Then, the body of the magnesium alloy bone nail is subjected to the second shot peening treatment. The shot peening adopts stainless steel shot with a hardness of 59HRC, the shot peening diameter is 0.3 mm, and the shot peening time is 40 minutes.

[0033] (3) Cleaning the shot-peened magnesium alloy bone nail body in step (2) to obtain a biomedical degradable magnesium alloy bone nail.

Embodiment 2

[0035] (1) Pretreat the body of the magnesium alloy bone nail to remove surface impurities;

[0036] (2) Fix the main body of the magnesium alloy bone screw and rotate it, start the shot blasting machine to perform shot blasting on the main body of the magnesium alloy bone screw,

[0037] The body of the magnesium alloy bone nail is shot peened for the first time, using stainless steel shot with a hardness of 58HRC, the shot peening diameter is 0.5mm, and the shot peening time is 90 minutes;

[0038] Then the body of the magnesium alloy bone nail is subjected to the second shot peening treatment. The shot peening adopts stainless steel shot with a hardness of 60HRC, the shot peening diameter is 0.2mm, and the shot peening time is 30 minutes.

[0039] (3) Cleaning the shot-peened magnesium alloy bone nail body in step (2) to obtain a biomedical degradable magnesium alloy bone nail.

Embodiment 3

[0041] (1) Pretreat the body of the magnesium alloy bone nail to remove surface impurities;

[0042] (2) Fix the main body of the magnesium alloy bone screw and rotate it, start the shot blasting machine to perform shot blasting on the main body of the magnesium alloy bone screw,

[0043] The body of the magnesium alloy bone nail is shot peened for the first time, using stainless steel shot with a hardness of 63HRC, the shot peening diameter is 0.5mm, and the shot peening time is 100min;

[0044] The body of the magnesium alloy bone nail is subjected to the second shot peening treatment, and the shot peening adopts stainless steel shot with a hardness of 58HRC, the shot peening diameter is 0.4 mm, and the shot peening time is 50 minutes.

[0045] (3) Cleaning the shot-peened magnesium alloy bone nail body in step (2) to obtain a biomedical degradable magnesium alloy bone nail.

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Abstract

The invention provides a preparation method of a biomedical degradable magnesium alloy bone nail. The preparation method comprises the steps that (1) a magnesium alloy bone nail body is pretreated toremove surface impurities; (2) the magnesium alloy bone nail body is fixed and can rotate, a shot blasting machine is started to perform shot blasting treatment on the magnesium alloy bone nail body,wherein stainless steel balls with the hardness of 58-63HRC and the diameter of 0.05-0.7mm are adopted for shot blasting; and (3) the magnesium alloy bone nail body obtained after the shot blasting treatment in the step (2) is cleaned, and the biomedical degradable magnesium alloy bone nail is obtained. According to the biomedical degradable magnesium alloy bone nail prepared through the method, degradation speed can be regulated and controlled, the degradation speed of the biomedical degradable magnesium alloy bone nail can be reduced, and in-vivo time of the biomedical degradable magnesium alloy bone nail is effectively regulated and controlled; and meanwhile, the preparation method of the biomedical degradable magnesium alloy bone nail is simple and low in cost and makes large-scale industrial production easy to realize.

Description

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Claims

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Application Information

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Owner 东莞立德生物医疗有限公司
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