Metal composite material containing anti-corrosion coating, degradable magnesium alloy bone screw and application

A metal composite material and anti-corrosion coating technology, which is applied in the field of medical devices, can solve problems affecting bone healing and inflammation, and achieve the effects of improving anti-degradation performance, improving affinity, and being easy to implement

Active Publication Date: 2020-10-09
河南省正骨研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the corrosion rate is too fast, a large amount of hydrogen gas will be generated, which will accumulate around the implant or under the skin, causing inflammation and affecting bone healing

Method used

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  • Metal composite material containing anti-corrosion coating, degradable magnesium alloy bone screw and application
  • Metal composite material containing anti-corrosion coating, degradable magnesium alloy bone screw and application
  • Metal composite material containing anti-corrosion coating, degradable magnesium alloy bone screw and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Using Mg-2Zn-0.5Y-1Nd-0.5Zr alloy as the metal raw material, the multi-axis CNC machining center is used to process bone screws into bone screws, and then the following pretreatments are performed: 0.1M sodium hydroxide solution is ultrasonically cleaned and placed in sequence Cleaning in pure water and absolute ethanol, drying at 45°C, conventional electropolishing in phosphoric acid-ethanol solution;

[0059] (2) Place the metal raw material pretreated in step (1) in a micro-arc oxidation electrolyte for micro-arc oxidation treatment, wherein the micro-arc oxidation electrolyte is a silicate system and contains the following components at a final concentration: 30g / L sodium silicate, 2g / L sodium hydroxide and 4g / L glycerin, the specific conditions of micro-arc oxidation treatment are: adopt the constant voltage mode of bidirectional pulse high voltage power supply, the electrical parameters are: forward frequency 750Hz, duty cycle 25 %, the forward voltage is 310...

Embodiment 2

[0065] (1) Using Mg-2Zn-0.5Y-1Nd-0.5Zr alloy as the metal raw material, the multi-axis CNC machining center is used to process bone screws into bone screws, and then the following pretreatments are performed: 0.1M sodium hydroxide solution is ultrasonically cleaned and placed in sequence Cleaning in pure water and absolute ethanol, drying at 45°C, conventional electropolishing in phosphoric acid-ethanol solution;

[0066] (2) Place the metal raw material pretreated in step (1) in a micro-arc oxidation electrolyte for micro-arc oxidation treatment, wherein the micro-arc oxidation electrolyte is a silicate system and contains the following components at a final concentration: 40g / L sodium silicate, 6g / L sodium hydroxide and 12g / L glycerin, the specific conditions of micro-arc oxidation treatment are: adopt the constant voltage mode of bidirectional pulse high voltage power supply, the electrical parameters are: forward frequency 750Hz, duty cycle 25 %, the forward voltage is 31...

Embodiment 3

[0073] (1) Using Mg-2Zn-0.5Y-1Nd-0.5Zr alloy as the metal raw material, the multi-axis CNC machining center is used to process bone screws into bone screws, and then the following pretreatments are performed: 0.1M sodium hydroxide solution is ultrasonically cleaned and placed in sequence Cleaning in pure water and absolute ethanol, drying at 45°C, conventional electropolishing in phosphoric acid-ethanol solution;

[0074] (2) Place the metal raw material pretreated in step (1) in a micro-arc oxidation electrolyte for micro-arc oxidation treatment, wherein the micro-arc oxidation electrolyte is a silicate system and contains the following components at a final concentration: 35g / L sodium silicate, 4g / L sodium hydroxide and 8g / L glycerin, the specific conditions of micro-arc oxidation treatment are: adopt the constant voltage mode of bidirectional pulse high voltage power supply, the electrical parameters are: forward frequency 750Hz, duty cycle 25 %, the forward voltage is 310...

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Abstract

The invention belongs to the field of medical instruments, and particularly relates to a metal composite material containing an anti-corrosion coating, a degradable magnesium alloy bone screw and an application. The metal composite material containing the anti-corrosion coating comprises a base body and a composite coating attached to the base body, wherein the composite coating sequentially comprises an oxidation ceramic layer and a calcium-phosphorus salt layer from inside to outside, the oxide ceramic layer is attached to the base body through micro-arc oxidation, and the calcium-phosphorussalt layer is attached to the oxidation ceramic layer through electrochemical deposition. According to the metal composite material containing the anti-corrosion coating, the corrosion resistance andthe tissue affinity of the metal material are improved, the preparation of bone repairing materials is applicative, particularly bone repair materials for bone internal fixation, and the metal composite material is simple in process, low in cost, excellent in performance, safe and environment-friendly, easy to implement and capable of realizing industrialization successfully. The invention further provides the degradable magnesium alloy bone screw prepared from the material.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a metal composite material containing an anti-corrosion coating, a degradable magnesium alloy bone screw and an application thereof. Background technique [0002] Most of the early bone fixation nails for bone repair were made of inert metals, including stainless steel, titanium alloys, cobalt-based alloys, and the like. This type of material has good strength and plasticity, which is conducive to processing and forming. At the same time, it is not easy to corrode in the human body and can reduce the release of harmful ions. However, the elastic modulus of traditional metal materials is very different from that of human bone tissue. After implantation, a stress shielding effect will occur, which will affect the bone healing process or lead to osteoporosis. In addition, long-term implantation of inert metal materials may release harmful ions, which may cause inflammatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/30C25D9/04C25D5/18A61B17/86
CPCA61B17/866C25D5/18C25D9/04C25D11/024C25D11/026C25D11/30
Inventor 郭智萍冯坤谢文关绍康朱世杰肖鹏罗亚鸽孙瑞王利国王俊
Owner 河南省正骨研究院
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