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Surface-modified porous metal implant and preparation method thereof

A porous metal and surface modification technology, applied in the field of medical devices, can solve problems such as uneven thickness of micro-arc oxidation coating, achieve the effect of reducing the gap in electric field strength and optimizing electric parameters

Active Publication Date: 2017-08-18
BEIJING AKEC MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a surface-modified porous metal implant and its preparation method 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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  • Surface-modified porous metal implant and preparation method thereof
  • Surface-modified porous metal implant and preparation method thereof
  • Surface-modified porous metal implant and preparation method thereof

Examples

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preparation example Construction

[0038] In a typical embodiment of the present application, a method for preparing a surface-modified porous metal implant is provided, the porous metal implant has structural pores, the preparation method includes performing micro-arc oxidation with multiple power supplies In the step, the plurality of power sources includes a first power source and a second power source, and the above step of micro-arc oxidation includes: connecting the first positive electrode interface of the porous metal implant to the positive electrode of the first power source; setting the connection negative electrode in the structural hole, And connect the negative pole to the negative pole of the first power supply; The second positive pole interface of the porous metal implant is connected to the positive pole of the second power supply; The electrolytic tank is connected to the negative pole of the second power supply; The porous metal implant is immersed in the The electrolytic solution is powered ...

Embodiment 1

[0067] The porous metal implant 10 prepared by electron beam melting technology is used as the modified object of embodiment 1. The porous metal implant has a central hole. When the inscribed circle of the central hole is directly 4mm, the diameter of the circumscribed circle is 10mm, and the height It is a cylindrical microporous titanium alloy with a diameter of 5mm, the porosity of the micropores is 60%, and the pore diameter is 400 μm. Four positive electrode interfaces 11 are arranged on the upper and lower end surfaces of the porous metal implant, and two of them are arranged at equal intervals on the upper end surface. Positive electrode interface 11, two positive electrode interfaces 11 are arranged at equal intervals on the lower end surface, and all four positive electrode interfaces are equidistant from the axis of the central hole.

[0068] The porous metal implant was subjected to strong sand blasting, the abrasive was corundum sand with a powder particle size of 5...

Embodiment 2

[0073] The difference from Example 1 is that the power supply voltage of the first power supply is adjusted to 200V, the power supply voltage of the second power supply is 700V, the output pulse frequency is 1200Hz, the pulse width is 400μs, the peak current is set to 160A, and the oxidation time is 10min.

[0074] figure 2 It is an EDS energy spectrum analysis diagram of the in-situ growth film layer formed according to Example 2 of the present invention. The results show that the film layer contains calcium, phosphorus and other biologically active elements, which is beneficial to improve the biological activity of the porous metal implant.

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Abstract

The present invention provides a surface-modified porous metal implant and a preparation method thereof. The porous metal implant has a structural hole, and the preparation method comprises a step of micro-arc oxidation by using a plurality of power sources for power supply. The power sources comprise a first power source and a second power source. The step of micro-arc oxidation comprises connecting a first anode connector of the porous metal implant with an anode of the first power source; arranging a connection cathode in the structural hole and connecting the connection cathode with a cathode of the first power source; connecting a second anode connector of the porous metal implant with an anode of the second power source; connecting an electrolytic bath with a cathode of the second power source; and immersing the porous metal implant into a bath solution and using the first power source and the second power source for power supply to carry out micro-arc oxidation treatment. The first power source and the second power source are controlled in a mutually independent manner. With power supply by the multiple power sources, an electric field intensity difference and an electric field energy intensity difference between the inner wall and the outer wall of the structural hole can be reduced, thereby obtaining an in-situ growth film with a good quality.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a surface-modified porous metal implant and a preparation method thereof. Background technique [0002] Titanium or titanium alloys are currently the most widely used bone tissue substitute materials in clinical practice due to their excellent comprehensive mechanical properties, corrosion resistance, and biocompatibility. Surrounded by a layer of cystic fibrous membrane, it is difficult to form a firm combination with the host bone in a short period of time. It is only a mechanical embedded osseointegration with the bone, rather than a chemical osseointegration, which is prone to stress concentration and implantation In addition, titanium or titanium alloy has low surface hardness, poor wear resistance, and unsatisfactory biocompatibility, which limits its application to a certain extent. [0003] The method of introducing micropores on the surface of titanium or titanium alloy t...

Claims

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Application Information

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IPC IPC(8): C25D11/26
CPCC25D11/005C25D11/026C25D11/26
Inventor 魏崇斌张卫平马小林李健王彩梅许奎雪李正一
Owner BEIJING AKEC MEDICAL
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