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A forming method of high antibacterial titanium alloy artificial hip joint

A hip joint and antibacterial technology, which is applied in the field of medical bone implant equipment manufacturing, can solve the problems of easy damage to the surrounding tissue of the implant, low bonding strength between the antibacterial coating and the matrix, stress deformation and cracks, etc., to achieve Effects of promoting attachment growth, promoting embedded connections, and enhancing binding strength

Active Publication Date: 2017-10-31
金湖县综合检验检测中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the titanium alloy artificial joint with antibacterial coating is implanted into the human body, under the interaction of load and corrosion friction, the antibacterial coating and the substrate have low bonding strength, and are prone to stress deformation and cracks, and even fracture failure, thereby reducing its service life.
More importantly, the broken antibacterial coating is easy to damage the tissues around the implant, increasing the pain of the patient

Method used

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  • A forming method of high antibacterial titanium alloy artificial hip joint
  • A forming method of high antibacterial titanium alloy artificial hip joint
  • A forming method of high antibacterial titanium alloy artificial hip joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The invention provides a method for forming a highly antibacterial titanium alloy artificial hip joint, which uses laser 3D printing and surface modification technology to form a highly antibacterial Ti-Cu-N artificial hip joint, specifically comprising the following steps:

[0034] Step (1): Scan the patient's hip joint with a CT machine to obtain a 3D data model, and perform layered slice processing on the model, with a thickness of 30 μm;

[0035] Step (2): After weighing 99% medical pure titanium powder with an average particle size of 30 μm and copper powder with an average particle size of 50 nm at a mass fraction of 1%, use a high-energy ball mill to grind the titanium alloy powder and copper powder at a rotational speed of 400 rpm, under the protection of argon with a purity of 99.99%, ball milling and mixing for 2 h to obtain titanium-copper alloy powder;

[0036] Step (3): Import the 3D data model of the hip joint processed in step (1) into the laser 3D printing...

Embodiment 2

[0042] The difference between this embodiment and Example 1 is that in step (2) the titanium alloy is set as Ti6Al4V powder, its mass fraction is 97%, and the copper powder mass fraction is 3%; in step (3), the laser power is set It is 175 W, and the others are the same as in Example 1.

[0043] Antibacterial performance test was carried out on the highly antibacterial Ti-Cu-N artificial hip joint formed in this embodiment, Staphylococcus aureus was selected as the test object, and artificial The antibacterial performance of the hip joint, the results showed that after one day of the test, the antibacterial rate of the titanium alloy hip joint against Staphylococcus aureus reached 97%, and the antibacterial rate still reached 96% after the test for four days, which has good long-lasting antibacterial performance.

Embodiment 3

[0045] The difference between this embodiment and Example 2 is that in step (3), the laser scanning speed is set to 1100 mm / s;

[0046] Antibacterial performance test was carried out on the highly antibacterial Ti-Cu-N artificial hip joint formed in this embodiment, Staphylococcus aureus was selected as the test object, and artificial The antibacterial performance of the hip joint, the results show that the antibacterial rate of the titanium alloy hip joint against Staphylococcus aureus reached 96% after the test for one day, and the antibacterial rate still reached 95% after the test for 4 days, which has good long-lasting antibacterial performance.

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Abstract

The invention discloses a forming method of a highly antibacterial titanium alloy artificial hip joint, which comprises the following process steps: (1) CT scanning and layered slice processing of a patient's hip joint data model; (2) design and processing of titanium-copper alloy powder Preparation; (3) Laser 3D printing of titanium alloy artificial hip joint; (4) In situ construction of titanium alloy artificial hip joint with Wiener-scale porous structure surface by anodizing technology; (5) Further plasma high temperature nitriding process Improve its antibacterial performance; (6) Seal after cleaning, sterilization and drying. The invention fully combines the laser 3D printing technology, the surface modification process and the excellent antibacterial performance of the copper element to realize the integrated manufacture of the complex structure of the artificial hip joint and the high antibacterial function. The forming method of the invention is simple and has outstanding performance, is suitable for the personalized customization of high antibacterial titanium alloy artificial hip joints, and has good social and economic benefits.

Description

technical field [0001] The invention relates to a forming method of a highly antibacterial titanium alloy artificial hip joint, in particular to a forming method of a high antibacterial Ti-Cu artificial hip joint based on laser 3D printing, which belongs to the field of medical bone implant device manufacturing. Background technique [0002] In recent years, due to the increasing aging of the global population and the increase in accidental injuries, the demand for artificial hip joints has surged. Titanium and its alloys are widely used as artificial joint materials due to their low elastic modulus, high specific strength, excellent corrosion resistance and biocompatibility, such as pure titanium and Ti6Al4V (TC4) for clinical use. At this stage, most of the artificial hip joint implants used in the domestic market are manufactured by a combined process of casting and machining. However, due to the complex macroscopic structure of the human hip joint and the low processing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/32B22F3/105B33Y10/00C25D11/26C23C8/36A61L27/06A61L27/04A61L27/56A61L27/54
CPCA61L27/047A61L27/06A61L27/54A61L27/56A61F2/30942A61F2/32C23C8/36C25D11/26B33Y10/00A61F2002/30948A61F2002/30985A61F2002/3006A61F2310/00023A61F2310/00467A61F2310/00407A61L2300/102A61L2300/404A61L2430/24B22F10/00B22F10/62B22F10/36B22F10/64B22F10/366B22F10/20B22F10/68Y02P10/25
Inventor 夏木建刘爱辉林岳宾李年莲丁红燕陈中鱼银虎叶玮
Owner 金湖县综合检验检测中心
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