Abstract
Mechanical understanding of dentin properties of is important for development of new dental materials, and is prerequisite to reveal the function and mechanisms of human hard tissues. In this study, nanoindentation test with specimens from permanent incisor teeth were used to evaluate the gradients in the overall mechanical properties, including nano-hardness and elastic modulus of a human dentin. It is shown from the results that decreasing gradient mechanical properties seems to be existed from crown to root of apex in incisor dentin. The elastic modulus and nano-hardness profiles were characterized by remarkable S-shaped curve for root dentin.
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