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A surface treatment method for slm-shaped titanium implants

A titanium implant and surface treatment technology, applied in the field of SLM molding titanium implant surface treatment, can solve the problem of titanium implants lacking micro-nano composite surface microstructure, unsatisfactory preparation effect of surface activation components, and poor surface hydrophilicity. Ideal and other problems, to achieve the effect of improving mineralization characteristics and biological activity, improving microscopic morphology, and low production cost

Active Publication Date: 2018-12-25
广东中科安齿生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent (application number) CN201410093637.X discloses a method for preparing a calcium-phosphorus-silver nanotube array on the surface of medical titanium. On the surface of the titanium matrix, the diameter of the tube is also limited to the nanometer range, and the interface with the surrounding bone tissue is limited to a certain extent.
[0005] Titanium implants currently in commercial use lack an ideal micro-nano composite surface microstructure, and there are problems such as unsatisfactory surface hydrophilicity. At the same time, the preparation effect of its surface activation components is not ideal, which affects its interface stability.

Method used

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  • A surface treatment method for slm-shaped titanium implants
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  • A surface treatment method for slm-shaped titanium implants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for surface treatment of SLM formed titanium implants, comprising the following steps:

[0033] (1) SLM molding of titanium implants: using titanium metal powder as raw material, the titanium implants with micron-scale structure on the surface were printed by SLM molding 3D printing, and the surface roughness Ra of the titanium implants after SLM molding was controlled to be 7 μm. Surface morphology such as figure 1 shown;

[0034] (2) Sandblasting: 60-mesh corundum or titanium dioxide was used for surface blasting of SLM-formed titanium implant samples. Sandblasting process conditions: compressed air pressure is 6bar, spraying distance is 60mm, spraying time is 10s, and its surface appearance is as follows: figure 2 shown. After sandblasting, the SLM-formed titanium implants were placed in acetone, 95% ethanol, and deionized water for 10 minutes, respectively, and then dried;

[0035] (3) Pickling to remove impurities: put the SLM-shaped titanium implant ...

Embodiment 2

[0041] A method for surface treatment of SLM formed titanium implants, comprising the following steps:

[0042] (1) SLM molding of titanium implants: using titanium metal powder as raw material, the titanium implants with a micron-scale structure on the surface are printed by SLM molding 3D printing, and the surface roughness Ra of the titanium implants after SLM molding is controlled to be 8 μm;

[0043] (2) Sand blasting treatment: 80-mesh corundum or titanium dioxide was used to perform surface blasting treatment on the SLM-formed titanium implant samples. Sandblasting process conditions: compressed air pressure is 6bar, spraying distance is 50mm, and spraying time is 20s. After sandblasting, the SLM-formed titanium implants were placed in acetone, 95% ethanol, and deionized water for 10 minutes, respectively, and then dried;

[0044] (3) Pickling to remove impurities: put the SLM-shaped titanium implant prepared in step (2) into the pickling solution for pickling treatment....

Embodiment 3

[0049] A method for surface treatment of SLM formed titanium implants, comprising the following steps:

[0050] (1) SLM molding of titanium implants: using titanium metal powder as raw material, the titanium implants with a micron-scale structure on the surface are printed by SLM molding 3D printing, and the surface roughness Ra of the titanium implants after SLM molding is controlled to 9 μm;

[0051] (2) Sandblasting: 60-mesh corundum or titanium dioxide was used for surface blasting of SLM-formed titanium implant samples. Sandblasting process conditions: compressed air pressure is 4bar, spraying distance is 70mm, and spraying time is 15s. After sandblasting, the SLM-formed titanium implants were placed in acetone, 95% ethanol, and deionized water for 10 minutes, respectively, and then dried;

[0052] (3) Pickling to remove impurities: put the SLM-shaped titanium implant prepared in step (2) into the pickling solution for pickling treatment. The pickling solution is prepar...

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Abstract

The invention discloses a method for treating the surface of an SLM-molded titanium implant, which comprises the following steps: SLM forming the titanium implant; sandblasting: using corundum or titanium dioxide to sandblast the surface of the SLM-molded titanium implant; pickling to remove impurities: The SLM-shaped titanium implants after sandblasting are placed in pickling solution for pickling treatment; alkali heat treatment: the SLM-shaped titanium implants after pickling treatment are placed in alkaline solution for hydrothermal treatment; calcification treatment: calcium salt The solution is a cation-exchange solution, and the SLM-shaped titanium implant after alkali heat treatment is placed in a cation-exchange solution at 100-200°C for hydrothermal treatment for 1-5 hours; after each step, the SLM-formed titanium implant is placed in acetone, 95 % ethanol and deionized water were ultrasonically cleaned and dried. The invention not only has simple steps and is easy to operate, but also constructs the surface of the SLM-formed titanium implant with a micro-nano hierarchical structure, and effectively improves the surface roughness, micro-morphology, mineralization characteristics and biological activity of the SLM-formed titanium implant.

Description

technical field [0001] The invention relates to the technical field of surface treatment of biomedical metal implant materials, in particular to a method for surface treatment of SLM formed titanium implants. Background technique [0002] With the development of medicine and 3D printing technology, titanium artificial implants using titanium powder selective laser melting stereolithography (SLM) are increasingly used to treat bone tissue lesions and repair defects, such as dental implants, Artificial joints, and bone internal fixation devices, etc. It makes the clinical treatment rise from the primary simple "repair" treatment to a higher level - bone tissue "replacement" treatment, thereby greatly improving people's quality of life. An ideal SLM laser rapid prototyping titanium-based bone implant should perform its corresponding physiological functions in the form of tight integration with bone tissue (Osseointegration). However, a considerable part of SLM laser rapid prot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F3/24A61L27/56A61L27/50A61L27/06
CPCA61L27/06A61L27/50A61L27/56B22F3/24B22F2003/247B22F2003/241B22F2003/242B22F2003/245B22F2998/10A61L2430/02A61L2400/18B22F10/00B22F10/62B22F10/66B22F10/64B22F10/28B22F10/68Y02P10/25
Inventor 欧阳江林陈贤帅罗坤连黄佳明管威
Owner 广东中科安齿生物科技有限公司
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