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Application of femtosecond laser in titanium or titanium alloy implantation material surface treatment

A femtosecond laser and surface treatment technology, used in bone implants, laser welding equipment, metal processing equipment, etc., can solve the problems of particle deposition in liquid, affecting surface patterning processing, reducing laser intensity, etc., to promote wound healing. Healing, small ablation threshold, small effect of thermal influence

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

When the femtosecond laser is used to process the surface of bulk titanium or titanium alloy materials in solution, it is difficult to focus the laser on the surface of bulk titanium or titanium alloy materials due to the refraction and nonlinear effects of the solution on light
At present, there is no report on the application of femtosecond laser in liquid to treat the surface of bulk titanium or titanium alloy materials.
Especially when the surface treatment of bulk titanium or titanium alloy materials is carried out in the hydroxyapatite suspension, due to the light scattering effect of the suspended particles in the liquid, when the concentration of the suspension is too high, the laser intensity will be reduced. Affects the effect of surface patterning; and when the concentration of the suspension is too low, it also affects the loading of calcium and phosphorus salts
There is no report on the use of femtosecond lasers to deposit particles in liquids on the surface of solid materials.

Method used

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  • Application of femtosecond laser in titanium or titanium alloy implantation material surface treatment
  • Application of femtosecond laser in titanium or titanium alloy implantation material surface treatment
  • Application of femtosecond laser in titanium or titanium alloy implantation material surface treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In the first step, the 10×10×3mm 3 The massive pure titanium material is polished step by step with 400-800 water sandpaper, ultrasonically cleaned with deionized water, and then placed in a clean open container for use;

[0039] In the second step, in the air, place the femtosecond laser pulse directly above the bulk pure titanium material processed in the first step, and use a 10x objective lens to focus vertically on its surface to form a focus with a laser spot radius of 5 μm;

[0040] In the third step, add hydroxyapatite suspension in the container of the first step, so that the liquid level is 2mm higher than the surface of the block titanium or titanium alloy material, and the composition of the hydroxyapatite suspension used is:

[0041] Ingredient Concentration

[0042] Nano-hydroxyapatite 20g / L

[0043] Polyvinylpyrrolidone 30g / L

[0044] Tris hydroxymethyl aminomethane 10g / L

[0045] Calcium Chloride Dihydrate 5g / L

[0046] solvent is water

[0047] Ad...

Embodiment 2

[0052] In the first step, the 10×10×3mm 3 The bulk titanium alloy material is polished step by step with 400-800 water sandpaper, ultrasonically cleaned with deionized water, and then placed in a clean open container for use;

[0053] In the second step, in the air, place the femtosecond laser pulse directly above the bulk titanium alloy material processed in the first step, and use a 10x objective lens to focus vertically on its surface to form a focus with a laser spot radius of 5 μm;

[0054] The third step is to add hydroxyapatite suspension in the container of the first step so that the liquid level is 3mm higher than the surface of the block titanium alloy material. The composition of the hydroxyapatite suspension used is:

[0055] Ingredient Concentration

[0056] Nano-hydroxyapatite 8g / L

[0057] Polyvinylpyrrolidone 10g / L

[0058] Trishydroxymethylaminomethane 5g / L

[0059] Calcium Chloride Dihydrate 2g / L

[0060] solvent is water

[0061]Using 10% dilute nitric...

Embodiment 3

[0066] The other steps and conditions are the same as in Example 1, except that the laser single pulse energy is set to 150 microjoules, the laser scanning speed is 1.0 mm / s, the laser processing line spacing is 50 microns, and the hydroxyapatite suspension used is The liquid formula is:

[0067] Ingredient Concentration

[0068] Nano Hydroxyapatite 15g / L

[0069] Polyvinylpyrrolidone 20g / L

[0070] Tris 8g / L

[0071] Calcium Chloride Dihydrate 3g / L

[0072] The solvent is water

[0073] Adjust the pH value of the hydroxyapatite suspension to 5 with 10% dilute nitric acid or dilute hydrochloric acid.

[0074] After irradiation treatment, the bulk pure titanium material forms a surface composed of regularly arranged peak-like protrusions of 5-10 μm in size and submicron micropores, and these peak-like protrusions are covered with a large number of submicron-sized small particles. At the same time, calcium and phosphate salts are loaded on the surface of the bulk pure tita...

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Abstract

The invention relates to an application of a femto-second laser in the treatment of titanium or titanium alloy implanting material surface, belonging to the technical field of application of laser in the material surface treatment, which comprises the following steps: in the air, the femto-second laser pulses are arranged over the massive titanium or titanium alloy materials, are vertically focused on the surface to form a focal point, the laser spot radius of which is 5 Mum, the processing parameters of the femto-second laser are: the PRF is 1 kHz, the single pulse energy is 50 to 300 micro-joules, the pulse width is 50 femto-seconds, the pulse center wavelength is 800 nm, the laser processing line spacing is 10 to 100 Mum, and the laser scanning speed is 0.2 to 1.0mm / s; the polarization direction of the femto-second laser is adjusted to be parallel with the scanning direction of the femto-second laser, the femto-second laser is used to scan the entire surface of the massive titanium or titanium alloy materials which have been immersed in hydroxyl apatite suspension liquid for 5 minutes, so the surface of the titanium or titanium alloy materials present uniform rough peak-like protrusions and a pattern of porous cyclist regular structure, and is loaded with the titanium-based biomedical material of calcium and phosphate salt.

Description

technical field [0001] The technical solution of the invention relates to the application of laser in surface treatment of materials, specifically the application of femtosecond laser in surface treatment of titanium or titanium alloy 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. Therefore, how to endow implants with biological functionality and improve their surface stability, wear resistance and mechanical compatibility is the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00B23K26/04B23K26/12A61F2/28A61C5/00A61L31/02A61L27/12A61L27/06B23K26/046B23K26/122
Inventor 梁春永王洪水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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