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Local spatial grid structure artificial joint prosthesis and preparation method thereof

A grid structure and artificial joint technology, applied in the direction of prosthesis, joint implants, joint implants, etc., can solve the problems of mechanical properties of damaged prostheses, and achieve the effect of protecting high-strength mechanical properties

Inactive Publication Date: 2008-10-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to address the deficiencies of the prior art, to provide a partial grid structure artificial joint prosthesis and its preparation method, so that it can overcome the existing problems of damaging the mechanical properties of the prosthesis itself in the process of preparing the surface porous structure of the artificial joint prosthesis. Insufficient, build a regular, interconnected pore structure, provide a suitable space structure for the growth of human cells and tissues, promote the growth of new tissue and joint prosthesis, and realize the biological fixation of the prosthesis

Method used

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  • Local spatial grid structure artificial joint prosthesis and preparation method thereof
  • Local spatial grid structure artificial joint prosthesis and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] First, weave titanium metal fiber wires with a diameter of 50 μm on a titanium plate with a length of 30 mm, a width of 20 mm, and a thickness of 3 mm. The weaving shape is an orthogonal grid structure, and the distance between the titanium wires is 200 μm; The titanium plate is placed in a vacuum sintering furnace for high-temperature sintering. The vacuum degree of the sintering furnace is 1×10 -3 Pa, the furnace temperature is room temperature, the furnace temperature is raised to 1200°C, and the heating rate is 5°C / min. During the sintering process, a pressure of 5 MPa is applied to the titanium plate with a titanium wire braided structure, and the heat preservation and pressure are maintained for 2 hours. Cool the furnace to room temperature to obtain a titanium plate with a surface grid structure; use laser welding technology to weld the titanium plate with a surface grid structure to the predetermined position on the artificial joint prosthesis to form a partial g...

Embodiment 2

[0038] First, weave a titanium metal fiber wire with a diameter of 500 μm on a titanium plate with a length of 50 mm, a width of 40 mm, and a thickness of 5 mm. The weaving shape is an orthogonal grid structure, and the distance between the titanium wires is 1200 μm; The titanium plate is placed in a vacuum sintering furnace for high-temperature sintering. The vacuum degree of the sintering furnace is 1×10 -3 Pa, the furnace temperature is room temperature, the furnace temperature is raised to 1400°C, and the temperature rise rate is 10°C / min. During the sintering process, a pressure of 2 MPa is applied to the titanium plate with a titanium wire braided structure, and the temperature is maintained for 1 hour. Cool the furnace to room temperature to obtain a titanium plate with a surface grid structure; use laser welding technology to weld the titanium plate with the surface grid structure to the predetermined position on the artificial joint prosthesis to form a partial grid st...

Embodiment 3

[0040]First, weave a titanium metal fiber wire with a diameter of 300 μm on a titanium plate with a length of 40 mm, a width of 30 mm, and a thickness of 4 mm. The weaving shape is an orthogonal grid structure, and the distance between the titanium wires is 700 μm; The titanium plate is placed in a vacuum sintering furnace for high-temperature sintering. The vacuum degree of the sintering furnace is 1×10 -3 Pa, the furnace entry temperature is room temperature, the furnace temperature is raised to 1300°C, and the temperature rise rate is 7.5°C / min. During the sintering process, a pressure of 1.5MPa is applied to the titanium plate with a titanium wire braided structure, and the heat preservation and pressure holding are carried out for 1.5h. Finally, the furnace temperature is cooled to room temperature to obtain a titanium plate with a surface grid structure; using laser welding technology, the titanium plate with the surface grid structure is welded to the predetermined posit...

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PUM

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Abstract

The invention relates to an artificial joint prosthesis with a local grid structure and the manufacturing method thereof, which belongs to the field of biomedicine engineering. The prosthesis comprises a prosthesis handle and a grid structure body, wherein the grid structure comprises a titanium plate and titanium fibers; and the titanium fibers are braided in cross, quadrangular or star shape and sintered on the titanium plate to form the 3D grid structure body with a pore size of 200 to 1,200 mum and a porosity of 30 to 60%. The manufacturing method comprises following steps: braiding and sintering the titanium fibers on the titanium plate to obtain the grid structure body, and welding on the predetermined portion of the joint prosthesis. The method can prevent the prosthesis handle from being subjected to high-temperature thermal processing, maintain good high-strength mechanical property and acquire proper grid structure, thus providing space for the growth of cells and tissue, promoting ankylosing of new-born bone tissue and host bone and achieving bio-fixation of prosthesis. The artificial joint prosthesis can be used for repairing injured joints clinically.

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 joint prosthesis with a partial grid structure and a preparation method thereof. Background technique [0002] Artificial joint replacement is to repair the joint damage caused by disease or tumor, relieve joint pain, deformity and dysfunction, and rebuild a joint with a function close to normal. At present, artificial joint replacement, especially artificial hip and artificial knee replacement, is considered to be a very effective treatment. The hip joint is a load-bearing joint with complex stresses. Under load-bearing conditions, it simultaneously bears the combined effects of tension, compression, torsion, interface shear, and repeated fatigue and wear. Therefore, it is required that the prosthesis must have sufficient strength, wear resistance and corrosion resistance. At present, the main materi...

Claims

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Application Information

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IPC IPC(8): A61F2/30A61L27/06
CPCA61F2/30907A61F2002/30001
Inventor 李祥王成焘
Owner SHANGHAI JIAO TONG UNIV
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