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Application of femtosecond laser in pure titanium implantation material surface treatment

An implant material, femtosecond laser technology, used in bone implants, laser welding equipment, and protective layers, etc., can solve the problems of easy shedding of the bioactive layer, inability to obtain surface patterns, and difficulty in roughness. Achieve the effect of improving biocompatibility, tight bonding and thin processing layer

Inactive Publication Date: 2008-09-17
HEBEI UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an application method of femtosecond laser in the surface treatment of pure titanium implant materials, by using laser assisted focusing to control focus, control femtosecond laser energy, processing distance, scanning speed, and polarization direction , so that uniform stripes, holes, grooves or regular patterns of these configurations are formed on the surface of the pure titanium implant material, that is, the surface forms a uniform roughness, and at the same time an oxide layer is formed on the titanium surface, which is conducive to Induce the directional growth of cells and promote the wound healing after implantation of titanium implant materials to overcome the existing sandblasting post-acid etching method, ion reactive etching method, electrochemical method, common laser processing method or plasma spraying method On the surface of titanium implant materials, it is difficult to obtain uniform roughness, regular surface patterns cannot be obtained, the bioactive layer is easy to fall off and the processing process is complicated.

Method used

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  • Application of femtosecond laser in pure titanium implantation material surface treatment
  • Application of femtosecond laser in pure titanium implantation material surface treatment
  • Application of femtosecond laser in pure titanium implantation material surface treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first step is to put 10×10×3mm 3 The large and small blocks of pure titanium implant material are polished step by step with 400-800 water sandpaper, then ultrasonically cleaned in deionized water, sealed and dried at room temperature, and then placed on the three-axis mobile sample stage to adjust the pure titanium implant material. surface to keep it level;

[0028] In the second step, in the air, the femtosecond laser pulse is vertically incident directly above the bulk pure titanium implant material processed in the first step, using a Nd:YAG laser and assisted focusing through a 10x objective lens, the femtosecond laser pulse Focus on the surface of the bulk pure titanium implant material to form a spot with a radius of 5 μm;

[0029] The third step is to set the femtosecond laser processing parameters as follows: pulse repetition frequency 1 kHz; single pulse energy 5 microjoules; pulse width 50 femtoseconds; pulse center wavelength 800 nanometers; laser proc...

Embodiment 2

[0033] The first step, with embodiment 1;

[0034] Second step, with embodiment 1;

[0035] The third step is to set the femtosecond laser processing parameters as follows: pulse repetition frequency 1 kHz; single pulse energy 150 microjoules; pulse width 50 femtoseconds; pulse center wavelength 800 nanometers; laser processing line spacing 100 microns, laser scanning speed 0.5 mm / second, adjust the laser polarization direction parallel to the laser scanning direction, scan the entire surface of the block pure titanium implant material with the femtosecond laser, thus forming uniform stripes, holes and holes on the surface of the pure titanium implant material A regular pattern of groove configuration combination, that is, a titanium-based biomedical material with uniform roughness and an oxide layer formed on the titanium surface.

[0036] Mouse osteoblasts were cultured on the obtained oxidized layer to verify their biological activity. The cells and culture methods used we...

Embodiment 3

[0039] The other steps are the same as in Example 2, except that the single laser pulse energy is set to 100 microjoules, the laser scanning speed is set to 0.8 mm / s, and the laser processing line spacing is set to 100 microns. Result is with embodiment 2.

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Abstract

The invention relates to an application of femto-second laser in the surface treatment of the pure titanium implanting material, belonging to the technical field of application of laser in the material surface treatment. The application method comprises the following steps: in the air, the femto-laser impulse is in normal incidence and focused right on the top of the lump pure titanium implanting material which is ground and dried, a light spot with a radius of 5um is formed at the surface of the pure titanium implanting material, the femto-laser processing parameters are defined as follows: the impulse repeat frequency is 1 kHz, the single impulse power is from 5 to 200 micro joule, the impulse width is 50 femtosecond, the impulse center wavelength is 800 nanometer, the line interval of the laser processing is between 10 to 100 micron, the laser scanning speed is between 0.5 to 1.2 mm / sec, the laser polarization direction is regulated to be parallel to the laser scanning direction, the femto-laser scans the whole surface of the pure titanium implanting material, a titanium based biomedical material with an oxide layer generated on the titanium surface, even roughness, and a pattern of strips, holes, grooves or the combined pattern thereof formed on the pure titanium implanting material is made.

Description

technical field [0001] The technical solution of the invention relates to the application of laser in the surface treatment of materials, specifically the application of femtosecond laser in the surface treatment of pure titanium implant materials. Background technique [0002] Metal implants to repair bone or tooth damage emerged in the 20th century. Implantation of pure titanium or titanium alloy materials, as an important means of bone and tooth restoration, has been increasingly used clinically in recent years because it can take into account the requirements of aesthetics and functionality. However, the huge changes in the stress environment after implant placement and the corresponding adaptive reconstruction of the surrounding bone often lead to implant loosening and dislocation, resulting in surgical failure. Good osseointegration is the biological basis for the normal function of pure titanium implants and the success of surgery. In order to increase the effect of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00B23K26/04A61F2/28A61C5/00A61L31/02A61L27/06B23K26/364B23K26/382
Inventor 王洪水梁春永杨建军陈学广杨阳杨贤金李长义王磊
Owner HEBEI UNIV OF TECH
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