Bal B Sonny, Khandkar Ashok, Lakshminarayanan R, Clarke Ian, Hoffman Aaron A, Rahaman Mohamed N
Department of Orthopaedic Surgery, University of Missouri-Columbia, MO 65212, USA.
J Arthroplasty. 2009 Jan;24(1):110-6. doi: 10.1016/j.arth.2008.01.300. Epub 2008 Apr 28.
Total hip arthroplasty (THA) bearings were fabricated from silicon nitride (Si(3)N(4)) powder. Mechanical testing showed that Si(3)N(4) had improved fracture toughness and fracture strength over modern alumina (Al(2)O(3)) ceramic. When tested with Si(3)N(4) cups in a hip simulator, both cobalt-chromium (CoCr) and Si(3)N(4) femoral heads produced low wear rates that were comparable to Al(2)O(3)-Al(2)O(3) bearings in THA. This study offers experimental support for a novel metal-ceramic THA bearing couple that combines the reliability of CoCr femoral heads with the wear advantages of ceramic surfaces.
全髋关节置换术（THA）的轴承由氮化硅（Si(3)N(4)）粉末制成。机械测试表明，与现代氧化铝（Al(2)O(3)）陶瓷相比，Si(3)N(4)具有更高的断裂韧性和断裂强度。在髋关节模拟器中使用Si(3)N(4)髋臼杯进行测试时，钴铬（CoCr）股骨头和Si(3)N(4)股骨头的磨损率都很低，与全髋关节置换术中的Al(2)O(3)-Al(2)O(3)轴承相当。本研究为一种新型金属-陶瓷全髋关节置换术轴承组合提供了实验支持，该组合将CoCr股骨头的可靠性与陶瓷表面的耐磨优势结合在一起。
