Fabrication and testing of silicon nitride bearings in total hip arthroplasty: winner of the 2007 "HAP" PAUL Award.

作者: B. Sonny Bal , Ashok Khandkar , R. Lakshminarayanan , Ian Clarke , Aaron A. Hoffman

DOI: 10.1016/J.ARTH.2008.01.300

关键词: CeramicComposite materialSilicon nitrideTotal hip arthroplastyFabricationHip simulatorBearing (mechanical)Forensic engineeringFlexural strengthMedicineFracture toughness

摘要: Total hip arthroplasty (THA) bearings were fabricated from silicon nitride (Si3N4) powder. Mechanical testing showed that Si3N4 had improved fracture toughness and strength over modern alumina (Al2O3) ceramic. When tested with cups in a simulator, both cobalt-chromium (CoCr) femoral heads produced low wear rates comparable to Al2O3-Al2O3 THA. This study offers experimental support for novel metal-ceramic THA bearing couple combines the reliability of CoCr advantages ceramic surfaces.

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