Université de Lyon, INSA Lyon, MATEIS - UMR CNRS 5510, 69621 Villeurbanne Cedex, France.
J Mech Behav Biomed Mater. 2011 Apr;4(3):303-14. doi: 10.1016/j.jmbbm.2010.10.010. Epub 2010 Nov 2.
Alumina-zirconia nano-composites were recently developed as alternative bearing materials for orthopedics. Previous, preliminary reports show that such alumina-zirconia nanocomposites exhibit high crack resistance and low wear rate. In this paper, additional information is given in terms of wear, crack resistance and ageing behaviour: femoral heads are inspected after 7 million cycles of wear testing on a hip simulator, crack resistance is measured and compared to other ceramics used today in orthopedics, slow crack growth is reported under static and cyclic fatigue, and aging resistance is assessed. We also report on the load to failure of femoral heads prototypes during compression tests. This overall reliability assessment ensures a potential future development for these kinds of new nanocomposites in the orthopedic field.
氧化铝-氧化锆纳米复合材料最近被开发为骨科用替代轴承材料。此前的初步报告表明，这种氧化铝-氧化锆纳米复合材料具有高抗裂性和低磨损率。本文还提供了有关磨损、抗裂性和老化行为的更多信息：在髋关节模拟器上进行了 700 万次磨损测试后，对股骨头进行了检查，测量了抗裂性并与目前在骨科中使用的其他陶瓷进行了比较，报告了在静态和循环疲劳下的缓慢裂纹扩展，并评估了耐老化性。我们还报告了压缩试验中股骨头原型失效时的负载。这种整体可靠性评估确保了这些新型纳米复合材料在骨科领域的潜在未来发展。
