TY - GEN
T1 - Use of nanoindentation for investigating the nanostructure of dentin tissue
AU - Wu, Bo Hsiung
AU - Chung, Chung Jen
AU - Han, Chang Fu
AU - Chen, Terry Yuan Fang
AU - Chuang, Shu Fen
AU - Li, Wang Long
AU - Lin, Jen Fin
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
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U2 - 10.1007/978-1-4614-0219-0_21
DO - 10.1007/978-1-4614-0219-0_21
M3 - Conference contribution
AN - SCOPUS:84863258686
SN - 9781461402183
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 153
EP - 158
BT - Mechanics of Biological Systems and Materials - Proceedings of the 2011 Annual Conference on Experimental and Applied Mechanics
PB - Springer New York LLC
T2 - 2011 SEM Annual Conference on Experimental and Applied Mechanics
Y2 - 13 June 2011 through 16 June 2011
ER -