Study on the Method of Hardness Test and the Distribution of Micro-Vickers Hardness of Human Teeth

DOI 5 Citations
  • SAITO Hitoshi
    Department of Dental Technology I, School of Dentistry, Tokyo Medical and Dental University

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  • 超微小領域におけるヒト歯質の硬さ試験方法ならびに硬さ分布に関する研究

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The measuring errors and dependences on loading condition such as load, load-holding time and loading speed, were examined for Micro-Vickers hardness testing.The distribution of microhardness of human teeth especially cementum which was difficult to measure in the past, was determined.Micro-Vickers hardness of human dentin depends on load, load-holding time and loading speed.The measuring apparatus should be chosen strictly, because the measuring error increases with a lighter load.The distribution of microhardness of human cementum could be measured by this method of microhardness test.The microhardnesses of peritubular dentin and intertubular dentin could be measured using a supermicro load, 0.2g.

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