The contribution of the micropores in bone cement surface to generation of femoral stem wear in total hip replacement

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2011-10-01 DOI:10.1016/j.triboint.2010.11.007

Hongyu Zhang , Leigh Brown , Liam Blunt , Xiangqian Jiang , Simon Barrans

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引用次数: 23

Abstract

Although cemented total hip replacement has long been recognized as a situation that can lead to wear, the wear generated on the femoral stem has not been well documented, especially with regard to how this wear is initiated and propagated. This present work aimed to further investigate this issue based on a comprehensive study on surface morphology of the femoral stem and the bone cement, which were collected from seven in vitro wear simulations. It was shown that the wear locations on the stem surface compared well with the results of retrieval studies, and the boundaries of the worn areas matched well the edges of the micropores present in the bone cement surface. This indicated that the micropores could potentially contribute to the generation of femoral stem wear. In addition, metallic debris was detected around the micropores from the simulation with increased loading cycles. However, no evidence of macro-cracks was observed across the cement mantle in spite of the presence of micro-cracks initiated at the edge of the micropores. This study demonstrated a possible cause for progression of femoral stem wear and it may have an important bearing on the long term durability of cemented hip prosthesis.

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全髋关节置换术中骨水泥表面微孔对股骨干磨损的影响

尽管骨水泥全髋关节置换术长期以来被认为是一种可导致磨损的情况，但对股骨干产生的磨损并没有很好的记录，特别是关于这种磨损是如何开始和传播的。本研究旨在通过对股骨干和骨水泥表面形态的综合研究来进一步研究这一问题，这些研究来自于7次体外磨损模拟。结果表明，骨水泥表面的磨损位置与检索研究结果吻合良好，磨损区域的边界与骨水泥表面微孔的边缘吻合良好。这表明微孔可能会导致股骨干磨损的产生。此外，随着加载循环次数的增加，在微孔周围检测到金属碎屑。然而，尽管在微孔边缘存在微裂缝，但在整个水泥地幔上没有观察到宏观裂缝的证据。本研究揭示了股骨干磨损进展的可能原因，并可能对骨水泥人工髋关节的长期耐久性产生重要影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.