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IntroductionAsearlyas1895,Blackstudiedthephysicalbehaviorofhumanteeth[1].Since1950thestudies Fig.1onmechanicalpropertiesofhumanteethhaveappearedinjournalsandmagazinessuccessively[2~13].Humanteethareverysmallandthespecimensusedfortestingareevensmaller… 相似文献
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