Effects of polar solvents on the fracture resistance of dentin : role of water hydration

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • R.K. Nalla
  • M. Balooch
  • J.W. Ager III
  • J.J. Kruzic
  • J.H. Kinney

Detail(s)

Original languageEnglish
Pages (from-to)31-43
Journal / PublicationActa Biomaterialia
Volume1
Issue number1
Online published24 Nov 2004
Publication statusPublished - Jan 2005
Externally publishedYes

Abstract

Although healthy dentin is invariably hydrated in vivo, from a perspective of examining the mechanisms of fracture in dentin, it is interesting to consider the role of water hydration. Furthermore, it is feasible that exposure to certain polar solvents, e.g., those found in clinical adhesives, can induce dehydration. In the present study, in vitro deformation and fracture experiments, the latter involving a resistance-curve (R-curve) approach (i.e., toughness evolution with crack extension), were conducted in order to assess changes in the constitutive and fracture behavior induced by three common solvents - acetone, ethanol and methanol. In addition, nanoindentation-based experiments were performed to evaluate the deformation behavior at the level of individual collagen fibers and ultraviolet Raman spectroscopy to evaluate changes in bonding. The results indicate a reversible effect of chemical dehydration, with increased fracture resistance, strength, and stiffness associated with lower hydrogen bonding ability of the solvent. These results are analyzed both in terms of intrinsic and extrinsic toughening phenomena to further understand the micromechanisms of fracture in dentin and the specific role of water hydration. © 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Research Area(s)

  • Dehydration, Dentin, Fracture toughness, Hydrogen bonding, R-curve

Citation Format(s)

Effects of polar solvents on the fracture resistance of dentin : role of water hydration. / Nalla, R.K.; Balooch, M.; Ager III, J.W.; Kruzic, J.J.; Kinney, J.H.; Ritchie, R.O.

In: Acta Biomaterialia, Vol. 1, No. 1, 01.2005, p. 31-43.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review