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Preparation method of surface modified microporous metal implant

A surface modification and implant technology, applied in the field of medical devices, can solve the problem of uneven thickness of the micro-arc oxidation coating, and achieve the effect of promoting osteoblast differentiation, reducing the gap of electric field strength, and inducing bone tissue regeneration.

Active Publication Date: 2019-04-09
BEIJING AKEC MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a method for preparing a surface-modified microporous metal implant, to solve the problem of uneven thickness of the micro-arc oxidation coating of the surface-modified porous metal implant in the prior art

Method used

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  • Preparation method of surface modified microporous metal implant
  • Preparation method of surface modified microporous metal implant
  • Preparation method of surface modified microporous metal implant

Examples

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Effect test

preparation example Construction

[0031] In a typical implementation of the present application, a method for preparing a surface-modified microporous metal implant is provided, including: providing a microporous metal implant with a plurality of anode interfaces; combining the plurality of anode interfaces with The positive pole of the power supply is connected, and the electrolytic cell is connected with the negative pole of the power supply; and the microporous metal implant is immersed in the electrolyte, and the micro-arc oxidation treatment is carried out by using the power supply.

[0032] The method for setting the above-mentioned anode interface on the microporous metal implant is the same as that of the prior art, and will not be repeated here.

[0033] In the micro-arc oxidation of the present application, by setting a plurality of anode interfaces, it is beneficial to control the current density of the microporous metal implant to be uniform and the electric field energy distribution to be consisten...

Embodiment 1

[0052] The microporous metal implant 10 prepared by electron beam melting technology is used as the modified object of embodiment 1. The microporous metal implant is a cylindrical microporous titanium alloy with a circumcircle diameter of 12 mm and a height of 12 mm. The porosity is 60%, the pore diameter is 400 μm, and it has a structural hole. The diameter of the inscribed circle of the structural hole is 4 mm. Four anode interfaces 11 are arranged on the upper and lower end surfaces of the microporous metal implant, and the upper end surfaces are equally spaced. Two, two at equal intervals on the lower end surface, and the distance between the anode interface 11 and the central axis of the structural hole is equal, the schematic diagram of the anode interface is as follows figure 1 shown.

[0053] The microporous metal implant was subjected to strong sandblasting, the abrasive was corundum sand with a powder particle size of 80 μm, the blasting distance was 4 cm, the compre...

Embodiment 2

[0058] The difference from Example 1 is that the microporous metal implant prepared by laser selective melting technology is used as the modified object. The microporous metal implant is a cylindrical microporous titanium with a circumcircle diameter of 12 mm and a height of 10 mm. alloy, with a microporous porosity of 80%, a pore diameter of 1200 μm, and a structural hole. The diameter of the inscribed circle of the structural hole is 8 mm. Six anode interfaces are arranged on the upper and lower end faces of the microporous metal implant. An anode interface, three anode interfaces on the lower end.

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Abstract

The present invention provides a preparing method of a surface-modified microporous metal implant. The preparing method comprises providing a microporous metal implant with a plurality of anode ports; connecting the anode ports with positive poles of power sources while connecting an electrolytic bath with negative poles of the power sources; and immersing the microporous metal implant into an electrolyte, and performing micro-arc oxidation treatment through power supply of the power sources. Through arrangement of the anode ports, the electric current density of the microporous metal implant is controlled to be uniform through arrangement of the positions of the anode ports, and the field energy is distributed uniformly. In comparison with a conventional single anode port, the multiple anode ports can help realize a field energy distribution as uniform as possible on the microporous metal implant, thus to reduce differences in electric field intensity and in field energy between an inner wall and an outer wall of a structural hole, thereby acquiring in-situ growth film layers with a better quality. For example, the thickness and thickness differences of the in-situ growth film layers can be controlled.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a method for preparing a surface-modified microporous metal implant. Background technique [0002] With the aging of the social population, trauma and tumors, orthopedic diseases have become one of the main diseases that threaten human health. Surgical treatment is the main and effective treatment method for end-stage diseases such as joints and spine. Most of the surgical treatment uses implants. Replace diseased hard tissue and perform corresponding functions. Due to their excellent comprehensive mechanical properties, corrosion resistance and biocompatibility, titanium and titanium alloys have been widely used as implanted prostheses in clinical practice. However, due to the technical limitations of traditional metal manufacturing, orthopedic titanium and titanium alloy implants are difficult to design and produce according to the shape of human anatomy, and lack precision. At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
CPCC25D11/005C25D11/026C25D11/26
Inventor 魏崇斌张卫平李健马小林王彩梅闫慧刘敏袁博文
Owner BEIJING AKEC MEDICAL
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