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Artificial hip joint with nano and porous structure on surface and preparation method thereof

A porous structure, hip joint technology, used in hip joints, joint implants, joint implants, etc., can solve the problems of inability to apply joint replacement, lack of mechanical properties such as strength, and achieve high hardness and strength. Stress shielding, overcoming the effect of material shedding

Inactive Publication Date: 2009-08-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned materials do not have sufficient mechanical properties such as strength and cannot be applied to actual joint replacements.

Method used

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  • Artificial hip joint with nano and porous structure on surface and preparation method thereof
  • Artificial hip joint with nano and porous structure on surface and preparation method thereof
  • Artificial hip joint with nano and porous structure on surface and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Fix the titanium alloy artificial hip joint on the processing machine and rotate it. Using Al 2 o 3 Particles (diameter 1 μm) bombard the joint surface, Al 2 o 3 The average jet velocity is 300m / s, and the energy of the average single particle bombardment is about 10 -10 J, making it obtain a gradient nanostructure, the surface grain size is about 500nm, and the thickness of the nanolayer is about 1 μm.

[0027] Then, hydrochloric acid is used to treat the surface of the nanometer, so that the surface has a porous structure, the pore diameter is about 100 nm to 10 μm, and the micropore distribution is uniform.

Embodiment 2

[0029] Fix the titanium alloy artificial hip joint on the processing machine and rotate it. Using Al 2 o 3 Particles (10 μm in diameter) bombard the joint surface, Al 2 o 3 The average jet velocity is 500m / s, and the energy of the average single particle bombardment is about 10 -7 J, making it obtain a gradient nanostructure, the surface grain size is about 100nm, and the thickness of the nanolayer is about 10μm.

[0030] Then, hydrochloric acid is used to treat the surface of the nanometer, so that the surface has a porous structure, the pore diameter is about 100 nm to 10 μm, and the micropore distribution is uniform.

Embodiment 3

[0032] Fix the titanium alloy artificial hip joint on the processing machine and rotate it. Using Al 2 o 3 Particles (diameter 20 μm) bombard the joint surface, Al 2 o 3 The average jet velocity is 500m / s, and the energy of the average single particle bombardment is about 10 -6 J, making it obtain a gradient nanostructure, the surface grain size is about 80nm, and the thickness of the nanolayer is about 50μm.

[0033]Then, hydrochloric acid is used to treat the surface of the nanometer, so that the surface has a porous structure, the pore diameter is about 100 nm to 10 μm, and the micropore distribution is uniform.

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Abstract

The invention relates to an artificial hip joint with surface nanometer and porous structure in the technical field of medical appliance and a preparation method thereof. In the artificial hip joint, the part of a femoral head handle or / and acetabulum combined with human organism has a scale of surface layer grains of between 1 and 500nm, and has an evenly distributed porous structure; and the artificial hip joint has a gradient nanometer structure from the surface inwards, the scale of the grains gradually increase along with increase of distance with the surface, until a scale of a conventional untreated state is achieved, and the thickness of the gradient nanometer layer is between 1 and 500 mu m. The preparation method comprises the following steps that: the artificial hip joint obtains the nanometer gradient structure layer by surface high-energy treatment technology; and then, the nanometer gradient structure layer is subjected to acid treatment so as to obtain a porous structure on the surface, thereby obtaining the artificial hip joint. The artificial hip joint and the method not only can effectively reduce stress shield effect of an implant body and a bone, but also can improve interface combination of the prosthesis and the bone, effectively improve the loosened implanted prosthesis, and have excellent application in the field of biomedicine.

Description

technical field [0001] The invention relates to an artificial joint in the technical field of medical devices and a preparation method thereof, in particular to an artificial hip joint with a surface nanometer and porous structure and a preparation method thereof. Background technique [0002] Artificial joints such as titanium alloys, stainless steel, and cobalt alloys have good biocompatibility, corrosion resistance, and good mechanical properties, and have been widely used in clinical practice. However, postoperative joint prosthesis loosening caused by factors such as poor bone-implant interface, surface wear, and stress shielding will not only cause pain and limping, but may also require revision surgery, which will affect the service life of the joint and even lead to joint replacement. fail. [0003] At present, it seems that the biological fixation effect of implants depends not only on the biomechanical compatibility of materials, but also on the combination of bon...

Claims

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Application Information

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IPC IPC(8): A61F2/34A61F2/36A61L27/06A61L27/04
CPCA61F2/30767A61F2/30771A61F2002/30001
Inventor 张小农赵常利
Owner SHANGHAI JIAO TONG UNIV
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