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Method for preparing titanium alloy bone implant with surface bioactivity through synchronous wire-powder laser deposition

A technology of laser deposition and biological activity, applied in prosthetics, drug delivery, tissue regeneration, etc., can solve the problems of easy peeling off of biological coatings and inability to realize personalized customization, so as to increase the area, ensure layer-by-layer growth, Effect of reducing crack tendency

Active Publication Date: 2018-08-28
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the biological coating of the titanium alloy bone implant prepared by the existing method is easy to fall off and cannot realize personalized customization, and provides a titanium alloy bone implant with silk powder synchronous laser deposition to prepare the surface bioactivity Methods

Method used

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  • Method for preparing titanium alloy bone implant with surface bioactivity through synchronous wire-powder laser deposition
  • Method for preparing titanium alloy bone implant with surface bioactivity through synchronous wire-powder laser deposition

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specific Embodiment approach 1

[0023] Specific embodiment 1: The method for preparing surface bioactive titanium alloy bone implants by synchronous laser deposition of silk powder in this embodiment includes the following steps:

[0024] 1. Preparation of bone implant matrix:

[0025] The titanium alloy wire is fed into the laser molten pool area by the wire feeder. The titanium alloy wire is gradually melted and resolidified into a titanium alloy deposition layer as the molten pool moves, and then on the first titanium alloy deposition layer Prepare the titanium alloy deposition layer again, repeat the process, prepare the titanium alloy deposition layer layer by layer, which is the titanium alloy matrix;

[0026] 2. Preparation of biologically active surface deposits:

[0027] While continuing to feed the titanium alloy wire along the axis, the hydroxyapatite powder is fed coaxially, and the hydroxyapatite-titanium composite layer is formed by laser deposition on the surface of the titanium alloy matrix to obtain...

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and the first embodiment is: in step 1, after the first titanium alloy deposition layer is completed, the laser power of each titanium alloy deposition layer is higher than that of the first titanium alloy deposition layer. The layer is reduced by 100-300W. Others are the same as the first embodiment.

specific Embodiment approach 3

[0031] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the scanning speed in step two is 0.02-0.04 m / min. Others are the same as the first or second embodiment.

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Abstract

The invention discloses a method for preparing a titanium alloy bone implant with surface bioactivity through synchronous wire-powder laser deposition, relates to a preparation method of a titanium alloy bone implant with surface bioactivity, and aims to solve the problems that a bio-coating for preparing a titanium alloy bone implant is liable to drop off and individual customization cannot be achieved. The method comprises the following steps: I, paraxially feeding a titanium alloy wire into a laser melting pool region by using a wire feeding machine, gradually melting the titanium alloy wire along with movement of the melting pool, re-solidifying the titanium alloy wire into a titanium alloy deposition layer, preparing another titanium alloy deposition layer on the first titanium alloydeposition layer, repeating the operation, and preparing titanium alloy deposition layers layer by layer so as to obtain a titanium alloy substrate; II, continuously paraxially feeding the titanium alloy wire, at the same time coaxially feeding a hydroxyapatite powder, performing overlapped laser deposition on the surface of the titanium alloy substrate so as to obtain a hydroxyapatite-titanium composite material layer, so as to obtain the titanium alloy bone implant with surface bioactivity. The method is adopted to prepare the titanium alloy bone implant with surface bioactivity.

Description

Technical field [0001] The invention relates to a preparation method of a titanium alloy bone implant with surface biological activity. Background technique [0002] As a biomedical material, titanium alloy has a large number of applications in artificial bone stents, artificial joints, artificial teeth and other bone implants due to its good biocompatibility, corrosion resistance and excellent mechanical properties. However, pure titanium and titanium alloys do not have biological activity. After being implanted in the human body, they are only mechanically embedded with human tissues, rather than reliable chemical osseous bonding. [0003] In recent years, laser technology is gradually being applied to the biomedical field. In view of the above-mentioned shortcomings of titanium alloy medical materials, the current commonly used method is to prepare HA biocoating on the surface of titanium alloy by laser welding method of preset hydroxyapatite (HA) powder to improve the biologic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/06A61L27/30A61L27/32A61L27/50B33Y10/00C23C24/10
CPCA61L27/06A61L27/306A61L27/32A61L27/50C23C24/10C23C24/103B33Y10/00A61L2430/02A61L2420/06A61L2400/18A61L2420/02
Inventor 李福泉冯时刘晗孙靖王联凤朱小刚
Owner HARBIN INST OF TECH
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