Application of femtosecond laser in pure titanium implantation material surface treatment

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...

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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.

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