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Fundamental Study on Improvement of Artificial Joint with the Functional Surface structure

功能性表面结构人工关节改进的基础研究

基本信息

批准号：
07458233
负责人：
YUHTA Toshio
金额：
$ 4.1万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07458233/
关键词：
Artificial Joint Friction and wear Wear of cup Functional Surface Structure Supply of Lubricant Trap of wear dust Pattern Spherical Accuracy

项目摘要

The aim of this study is the long term clinical use of artificial joint by preventing wear dibris of high-density polyethylene (HDP) using "patterning" for frictional surfaces. The effect of frictional surface of the metal (SUS316L,Co-Cr alloy) vs HDP were investigated.From the results of the friction tests with the pin-on-disk experimental system, we found that the introduction of surface patterns enhances lubrication conditions between the metal) and HDP and reduces the creation of wear particles of HDP.The optimum sizes for the diameter and the pitch of the pattern were found. And good lubrication was maintained not in a short time but for a long time during the test.Based on these studies, we experimented the friction tests between the patterned femoral heads and acetabular cups with a hip simulator. In this result, we couldn's find decrease of the coefficient of friction. But the effect of patterning for good lubrication was suggested from the observation of the frictional surfaces with a light microscope. However, if the patterned head had bad condition on surface, lubrication would get worse. Therefore, we have to investigate about the good way of patterning on the surface of head and on the contact area of cup. Moreover we have to improve our simulator, for example the way of loading to friction surface. Then the problem after this are development of the new hip simulator and experiment with it again.

本研究的目的是通过对摩擦表面进行“图案化”来防止高密度聚乙烯 (HDP) 的磨损碎片，从而实现人工关节的长期临床使用。研究了金属（SUS316L、钴铬合金）与HDP摩擦表面的影响。从销盘实验系统的摩擦测试结果来看，我们发现表面图案的引入增强了金属（SUS316L、Co-Cr合金）与HDP之间的润滑条件，并减少了HDP磨损颗粒的产生。找到了图案直径和节距的最佳尺寸。并且在测试过程中不是短时间内而是长时间地保持了良好的润滑。基于这些研究，我们用髋模拟器进行了图案化股骨头和髋臼杯之间的摩擦测试。在此结果中，我们发现摩擦系数有所降低。但通过光学显微镜观察摩擦表面，可以看出图案对于良好润滑的作用。但如果图案头表面状况不好，润滑效果就会变差。因此，我们必须研究头部表面和杯体接触区域的良好图案化方式。此外，我们还必须改进我们的模拟器，例如加载到摩擦表面的方式。接下来的问题是开发新的髋关节模拟器并再次进行实验。