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Bio-medicinal porous titanium material and preparation method thereof

A biomedical, porous titanium technology, applied in medical science, prosthesis, etc., can solve the problems of insufficient strength of high-porosity porous titanium, loosening or fracture of implants, and mismatch of mechanical properties of titanium and titanium alloys with natural bone, etc. To achieve the effect of reducing stress shielding problems and reducing the problem of insufficient strength

Inactive Publication Date: 2010-12-15
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to address the mechanical properties of titanium and titanium alloys in the biomedical bone repair or replacement implant materials in the prior art that do not match the natural bone, which is prone to stress shielding and causes bone stress absorption around the implant. , eventually lead to loosening or fracture of the implant, and insufficient strength of high-porosity porous titanium, providing a new biomedical porous titanium material, which has excellent corrosion resistance, biocompatibility, and is compatible with The mechanical properties that match natural bone can provide a good transmission channel for the growth of bone cells, and solve the problems of stress shielding, loosening, and fracture

Method used

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  • Bio-medicinal porous titanium material and preparation method thereof
  • Bio-medicinal porous titanium material and preparation method thereof
  • Bio-medicinal porous titanium material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The biomedical porous titanium material in this example includes 15 layers, and the porosity increases layer by layer from the inside to the outside, as follows: (innermost layer) 0%, 5%, 10%, 15%, 20%, 25% , 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, (the outermost layer) 70%, the pore diameter is 100μm-300μm; the length, width and height of the material are respectively 30mm, 20mm, 10mm flat plate; the thickness of each layer (in the same direction) is the same.

[0037] The biomedical porous titanium material of this example is prepared by a method comprising the following steps:

[0038] (1), mixing materials:

[0039] The part with 0% porosity in the innermost layer directly selects Ti with high mechanical properties and good biocompatibility. 6 Al 7 Nb titanium alloy plate is used as raw material; the rest of the layers are prepared according to the above-mentioned porosity: raw material titanium powder (atomized spherical titanium powder with a particle size of 50 ...

Embodiment 2

[0047] The biomedical porous titanium material in this example includes 11 layers, and the porosity increases layer by layer from the inside to the outside, as follows: (innermost layer) 0%, 5%, 10%, 15%, 20%, 25% . (in the same direction) the same.

[0048] The biomedical porous titanium material of this example is prepared by a method comprising the following steps:

[0049] (1), mixing materials:

[0050] Prepare raw material titanium powder (biomedical spherical atomized titanium powder with a particle size of 30 μm) and pore-forming agent (sodium chloride) with a particle size of 50 μm-200 μm according to the different porosities of the above layers, pore-forming agent and raw titanium powder The proportion of the amount used is calculated according to the porosity of each layer; the pore-forming agent and the raw material titanium powder are evenly mixed to obtain a composite material of the pore-forming agent and the raw material titanium powder;

[0051] (2), fillin...

Embodiment 3

[0060] The biomedical porous titanium material in this example includes 10 layers, and the porosity increases layer by layer from the inside to the outside, as follows: (innermost layer) 0%, 10%, 20%, 30%, 40%, 50% .

[0061] The biomedical porous titanium material of this example is prepared by a method comprising the following steps:

[0062] (1), mixing materials:

[0063] Prepare raw titanium powder (atomized spherical titanium powder with a particle size of 50 μm) and a pore-forming agent (urea) with a particle size of 200 μm-400 μm according to the different porosities of the above-mentioned layers, and the ratio of the amount of the pore-forming agent to the raw titanium powder is respectively Calculate according to the porosity of each layer; mix the pore-forming agent and raw titanium powder evenly to obtain a composite material of pore-forming agent and raw titanium powder;

[0064] (2), filling, pre-pressing molding:

[0065] Fill the pore-forming agent and raw t...

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Abstract

The invention discloses a bio-medicinal porous titanium material. The porous titanium material comprises at least two layers, the porosity of the material is enlarged layer by layer from inside to outside, the porosity of the innermost layer is 0 to 50 percent, the porosity of the outermost layer is 30 to 90 percent, and the size of aperture is 50 to 500 microns. The porous titanium material has excellent corrosion resistance and biocompatibility, has the mechanical property matched with natural bones, meanwhile can provide a good transmission passage for growth of bone cells, and can solve the stress shielding phenomenon and the problems of loosening, breakage and the like.

Description

Technical field [0001] The present invention is a technology field of biomedical materials, which involves a biomedical porous titanium material and its preparation methods. Background technique [0002] Surgical implants for human hard tissue (such as bone, joints, roots, etc.) repair or replacement are special functional materials that are closely related to human life and health, and have extensive application needs in clinical practice.At present, the clinical application of surgical implants is mainly titanium, titanium alloy and hydroxylhhexylite (HA) ceramic materials. [0003] Due to excellent biological activity, the implant can be combined with the tissue because of excellent biological activity, so it is a widely used biological activity material.However, due to the inherent brittleness of biological ceramic materials itself and fatigue damage in the physiological environment, it is limited in the repair of the application, especially in the repair of the load bone seg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/06A61L27/56C22C1/08C22C14/00B22F3/11
Inventor 刘颖田卫东连利仙龙洁邹慧
Owner SICHUAN UNIV
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