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Function gradient bionic structure titanium alloy artificial implant and forming method thereof

A functional gradient, titanium alloy technology, applied in bone implants, metal processing equipment, prostheses, etc., can solve the problems of antibacterial coating cracks, limited bonding strength, broken, etc., to avoid stress shielding and reduce elastic modulus , Improve the effect of bonding strength

Active Publication Date: 2018-04-24
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the antibacterial coating obtained through surface modification and the titanium alloy substrate are bonded by physical van der Waals force, and the bonding strength is limited. It is difficult for the titanium alloy bone implant to avoid interaction with the surrounding bone tissue during service, such as friction and interaction. Stress contact, etc., can easily lead to cracks or even breakage of the antibacterial coating under stress, resulting in premature failure

Method used

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  • Function gradient bionic structure titanium alloy artificial implant and forming method thereof
  • Function gradient bionic structure titanium alloy artificial implant and forming method thereof
  • Function gradient bionic structure titanium alloy artificial implant and forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: Use a CT scanner to scan the bones of different people to obtain 3D model data, and use the topology optimization TOSCA software to design the bones with a gradient design of a honeycomb structure with a gradient factor of 1.5:1 to obtain a 3D model of the gradient bionic structure implant;

[0034] Step 2: Perform curved surface repair on the gradient bionic structure implant model described in Step 1, and perform layered slice processing;

[0035] Step 3: Prepare the absolute ethanol solution of the surfactant cetyltrimethylammonium bromide to obtain a solution with a concentration of 0.5 mol / L. Add nano silver particles with an average particle size of 15 nm to the solution, and after ultrasonic vibration dispersion Vacuum drying to obtain highly dispersed nano silver powder;

[0036] Step 4: After weighing the highly dispersible nano silver powder obtained in step 3 and the spherical medical pure titanium powder with a particle size of 15-60 μm and a purity of 99.5...

Embodiment 2

[0042] The difference between this embodiment and Example 1 is that in step 3, the average particle size of nano silver particles is selected as 50 nm; in step 4, the titanium alloy is set to Ti-Zr alloy, and in step 5, the laser output line energy density is 300J / m, the concentration of cetyltrimethylammonium bromide is 2mol / L, and the others are the same as in Example 1.

[0043] The antibacterial performance test of the functionally graded bionic titanium alloy artificial implant formed in this example was carried out. Staphylococcus aureus was selected as the test object, and the artificial hip was tested according to QB / T2591-2003 "Antibacterial Plastics-Antibacterial Performance Test Method and Antibacterial Effect" The antibacterial properties of the joints, the results showed that after 24h of the test, the antibacterial rate of the titanium alloy hip joint against Staphylococcus aureus reached 96%, and the antibacterial rate still reached 95% after 72h of the test, and it...

Embodiment 3

[0045] The difference between this embodiment and Example 2 is that in step 4, the titanium alloy is set to Ti-Nb alloy, the mass ratio of nano silver particles to spherical titanium alloy powder is set to 1:95; the ball milling speed is set to 250 rpm; In step 5, the laser output line energy density is 100 J / m; in step 6, the annealing temperature is set to 250° C., the concentration of hexaalkyltrimethyl ammonium bromide is 1 mol / L, and the others are the same as in Example 2.

[0046] The antibacterial performance test of the functionally graded bionic titanium alloy artificial implant formed in this example was carried out. Staphylococcus aureus was selected as the test object, and the artificial hip was tested according to QB / T2591-2003 "Antibacterial Plastics-Antibacterial Performance Test Method and Antibacterial Effect" The antibacterial properties of the joints, the results show that after 24h of the test, the antibacterial rate of the titanium alloy hip joint against Sta...

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Abstract

The invention discloses a function gradient bionic structure titanium alloy artificial implant and a forming method thereof. Based on the special service performance demand of the human body skeletonand the enlightenment of the high performance of a honeycomb space porous structure in nature, by combining the excellent anti-bacterial performance of metal silver nanoparticles in the human body, and by means the advanced laser additive manufacturing technology, the low-modeling gradient bionic structure titanium alloy artificial implant with a high anti-bacterial performance function is precisely formed. According to the function gradient bionic structure titanium alloy artificial implant and the forming method thereof, the integrated manufacturing of the titanium alloy artificial implant with a bionic structure and the anti-bacterial function is achieved, the manufacturing efficiency is greatly improved, the production cost is effectively reduced, and good economic benefits are achieved; and on the other hand, the titanium alloy artificial implant manufactured through the method achieves the excellent mechanical performance and the anti-bacterial performance, the biocompatibility and the service performance of the implant are remarkably improved, and wide market prospects are achieved.

Description

Technical field [0001] The invention relates to the field of high-performance medical bone implantation equipment manufacturing, in particular to a functionally graded bionic structure titanium alloy artificial implant and a forming method thereof. Background technique [0002] With the increasing aging of society, as of the end of 2016, the number of people over 60 in my country has exceeded 220 million. The degree of osteoporosis in the elderly gradually worsens, and minor trauma can also easily lead to the occurrence of comminuted fractures of the proximal skin. Most of them require bone replacement surgery. At the same time, bone replacement surgery caused by traffic accidents or accidents in my country has also shown a sharp increase, prompting a rapid increase in the demand for titanium alloy artificial implants. However, clinical experiments have shown that there is a large difference in elastic modulus between high-rigidity fixtures or implants and human bones, so that m...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/11B22F3/24B33Y10/00B22F1/00A61F2/28B22F1/145
CPCA61F2/28B22F3/1115B22F3/24B33Y10/00A61F2240/001B22F2003/248B22F2998/10B22F10/00B22F1/147B22F1/145B22F10/34B22F10/36B22F10/28B22F10/64B22F10/366B22F10/68B22F10/32B22F10/80B22F1/09B22F10/20Y02P10/25
Inventor 刘爱辉夏木建林岳宾叶玮丁红燕陈中袁天然
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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