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Method for preparing low-friction and high-hardness artificial hip joint ball through surface patterning

A hip, low-friction technology, used in hip joints, joint implants, joint implants, etc., can solve the problems affecting the anti-wear ability of artificial joints and the internal stress of materials, reducing the real contact area, Shape and quality more, precise and controllable effects of shape and quality

Active Publication Date: 2015-11-18
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

At the same time, the difference in thermal expansion coefficient between the coating and the substrate will lead to internal stress in the material, which will affect the wear resistance of the artificial joint

Method used

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  • Method for preparing low-friction and high-hardness artificial hip joint ball through surface patterning
  • Method for preparing low-friction and high-hardness artificial hip joint ball through surface patterning
  • Method for preparing low-friction and high-hardness artificial hip joint ball through surface patterning

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Embodiment Construction

[0031] figure 1 As shown, the present invention is realized as:

[0032] Forming a patterned dimple array on the surface of the artificial hip joint ball, that is, preparing a patterned dimple array on the friction surface of the artificial hip joint ball by laser interference lithography, including the following steps:

[0033] a. Ultrasonic cleaning of the hip joint ball;

[0034] b. Establish a three-beam laser interference optical system to etch samples;

[0035] c. Change the three-beam interference parameters to obtain a periodic lattice structure with adjustable structural period from nanometer to micrometer and controllable depth;

[0036] d. Optimize the interference light intensity and exposure time parameters of the three-beam interference system to obtain a low-friction, high-hardness artificial hip joint ball head.

[0037] Such as figure 2 As shown, it is a model diagram of the artificial hip joint ball head prepared by the present invention; the artificial ...

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Abstract

The invention relates to a method for preparing a low-friction and high-hardness artificial hip joint ball through surface patterning. The low-friction and high-hardness artificial hip joint ball is made from a CO-Cr-Mo alloy material, and the method is characterized in that patterned dimple arrays are formed on the surface of the artificial hip joint ball, namely the patterned dimple arrays are made on the friction surface of the artificial hip joint ball through laser interferometric lithography to form a small temporary synovial fluid or tissue fluid storage device, and meanwhile the actual contact area between friction pairs is decreased and abrasive grains produced in the friction process are accommodated to achieve the friction-reducing purpose. The instantaneous high temperature of laser enables the grains to be refined, the material hardness is enhanced, and the artificial hip joint with low friction and high hardness is obtained. The low-friction and high-hardness artificial hip joint ball has good lubricating property and can reduce the friction effect between interfaces of the friction pairs of the artificial hip joint and reduce friction. In addition, the hardness is improved, the abrasion is reduced, and the friction and abrasion resisting performance of an existing artificial hip joint ball is optimized.

Description

technical field [0001] The invention relates to a method for preparing a low-friction and high-hardness artificial hip joint ball head by surface patterning, which belongs to the improvement of the performance of the existing artificial hip joint. Background technique [0002] Artificial joint replacement is currently the most effective method for the treatment of end-stage joint diseases, which can significantly improve the motor function and quality of life of patients. Due to the continued aging of the population and the significant increase in human lifespan, there is an urgent need to develop long-lived artificial joints. Therefore, the key issue that needs to be solved at present is whether to provide high-quality, low-cost, long-life, biocompatible artificial joints for hundreds of millions of patients with osteoarthritis worldwide. [0003] Artificial joint technology involves the intersection of various disciplines such as material science, biotribology and medical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/32
Inventor 王作斌魏晓凤李文君梁铂坚付跃刚李冰琳宋正勋翁占坤董莉彤
Owner CHANGCHUN UNIV OF SCI & TECH
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