Use of nanoindentation for investigating the nanostructure of dentin tissue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Human dentin contains millions of tubules, and the distribution and size of tubule is none-homogeneous, which resulting in various mechanical properties. In this study, we utilize a nanoindentor on the human dentin, and a focused ion-beam (FIB) is adopted to prepare the dentin specimen for transmission electron microscopy (TEM) to evaluate the nanostructure of human dentin after the residual impression of the nanoindents. The nanoindentation results show that the loading-unloading curve is continuous and smooth in both the loading and the unloading steps, which suggests that no cracking occurs. As to the TEM specimen, 50 nm thick specimens are prepared by FIB cross-sectioning. The nano-structural observations reveal that nanoindentation induces an atomic re-orientation, and the indent results in the formation of highstress deformation regions beneath the indenter. High resolution images via TEM and diffraction patterns indicate the dentin is poly-crystallized and present anisotropic properties.

Original languageEnglish
Title of host publicationMechanics of Biological Systems and Materials - Proceedings of the 2011 Annual Conference on Experimental and Applied Mechanics
Pages153-158
Number of pages6
Publication statusPublished - 2011 Dec 1
Event2011 SEM Annual Conference on Experimental and Applied Mechanics - Uncasville, CT, United States
Duration: 2011 Jun 132011 Jun 16

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume2
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

Other2011 SEM Annual Conference on Experimental and Applied Mechanics
CountryUnited States
CityUncasville, CT
Period11-06-1311-06-16

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All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

Cite this

Wu, B. H., Chung, C. J., Han, C. F., Chen, T. Y. F., Chuang, S. F., Li, W. L., & Lin, J. F. (2011). Use of nanoindentation for investigating the nanostructure of dentin tissue. In Mechanics of Biological Systems and Materials - Proceedings of the 2011 Annual Conference on Experimental and Applied Mechanics (pp. 153-158). (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 2).