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Medical titanium/magnesium composite material and preparation method thereof

A composite material and magnesium alloy technology, applied in the field of biological materials, can solve the problem of not being able to meet all the requirements of bone implantation, and achieve the effects of facilitating bone conduction, avoiding stress shielding, and low preparation cost

Inactive Publication Date: 2014-02-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the single application of the above materials cannot meet all the requirements of bone implants.

Method used

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  • Medical titanium/magnesium composite material and preparation method thereof
  • Medical titanium/magnesium composite material and preparation method thereof

Examples

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Effect test

example 1

[0028] Using medical-grade medical titanium wire with a diameter of 0.005mm, a porous titanium skeleton with a set shape and porosity is prepared by a braiding machine, and the porosity is 90%. Then, the medical Mg- The RE alloy solution is injected into the pores of the porous titanium framework, and a composite material is formed after cooling; the compressive strength of this composite material is 400MPa, and its elastic modulus reaches 45GPa, which is suitable for bone repair occasions that require high bone.

example 2

[0030] Medical grade medical titanium alloy wire with a diameter of 3mm is used to prepare a porous titanium skeleton with a set shape and porosity by conventional winding, and its porosity is 20%. Through negative pressure suction casting technology, the medical Mg- The Ca alloy solution is injected into the pores of the porous titanium skeleton to form a composite material, and finally the micro-arc oxidation surface treatment is performed on the formed medical titanium / magnesium composite material; the compressive strength of the composite material is 50MPa, and the elastic modulus is 1GPa. It is conducive to osteogenesis and is suitable for bone repair occasions that require high bone.

example 3

[0032] Using medical-grade medical titanium wire with a diameter of 0.27mm, a porous titanium skeleton with a set shape and porosity is prepared by a braiding machine, and the porosity is 63%; through pressureless infiltration technology, the medical-grade pure magnesium The metal solution is added with Ag and Sr elements and injected into the pores of the porous titanium skeleton to form a composite material. Finally, anodic oxidation surface treatment is performed on the formed medical titanium / magnesium composite material; the compressive strength of this composite material is 228MPa, and the elastic modulus The content is 9.22GPa, which is beneficial to the bactericidal effect and osteogenic effect, and is suitable for bone repair occasions with high bone requirements.

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Abstract

The invention discloses a medical titanium / magnesium composite material which comprises a porous skeleton, wherein the porous skeleton is prepared from medical-grade titanium wires or titanium alloy wires and prepared into a preset shape and a preset porosity by using a conventional winding or knitting machine, the porous skeleton is filled with three-dimensional through pores with different porosities capable of meeting various bone implantation requirements, then a medical magnesium or magnesium alloy melt is infiltrated in the pores of the porous skeleton by pressureless infiltration or negative-pressure suction casting, and after the porous skeleton is cooled, a medical titanium / magnesium composite material is formed. The composite material disclosed by the invention is reasonable in structure and excellent in mechanical properties; in the early stage of body implantation, the mechanical properties of the composite material can be matched with bones well, thereby avoiding stress shielding; after the composite material is implanted, with the degradation of magnesium, a porous structure of an implant is constantly restored, so that bone conduction is facilitated, and the requirements of most of bone filling, bone repair and bone transplantation applications can be met, therefore, the composite material is applicable to bone implanting operations with relatively high strength requirements.

Description

technical field [0001] The invention relates to a biomedical material, in particular to a medical titanium / magnesium composite material composed of a winding porous titanium material and a degradable magnesium alloy and a preparation method thereof, belonging to the technical field of biological materials. Background technique [0002] Orthopedic implant materials have become an indispensable material for bone grafting, bone defect filling and repair surgery. Studies have shown that the elastic modulus of biomaterials is very important for bone implants. Due to the difference in elastic modulus between metallic materials and human bones, the mismatch of mechanical properties between biomaterials and human bones can lead to a "stress shielding" phenomenon. In order to solve this problem, it is necessary to obtain medical metals with the lowest possible elastic modulus. Material, solid material porosity can significantly reduce the elastic modulus of the material. [0003] Th...

Claims

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Application Information

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IPC IPC(8): A61L27/06A61L27/04A61L27/56A61L31/02A61L31/14
Inventor 何国江国峰
Owner SHANGHAI JIAO TONG UNIV
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