Influence of hydration on nanoindentation induced energy expenditure of dentin

Luiz Bertassoni, Michael Vincent Swain

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Improved understanding of the effects of hydration and drying in mineralized tissues is highly desirable, particularly for physiologically hydrated biological materials such as dentin. We investigated the influence of hydration on the nanomechanical properties of healthy dentin and hypothesized that drying leads to an increase in indentation induced energy expenditure and hardness. Hydrated and dry dentin were tested with a UMIS set up with a Berkovich indenter at a maximum load of 50mN. Values representative of the energy expenditure behavior were presented as dissipated energy, U d, recovered energy, U e, normalized energy expenditure index, ψ, and hardness, H. Energy expenditure index results, which normalize the energy expenditure for each test and describe the relative energy dissipation-recovery behavior of a material, suggested that, for the relatively severe contact strains about a sharp Berkovich indenter, dissipation dominates the mechanical response of both the hydrated and dry dentin. In support of our initial hypothesis, dry dentin presented a significantly higher energy expenditure index than hydrated dentin (pe that was found upon drying. Hydration also decreased H significantly (p

Original languageEnglish (US)
Pages (from-to)1679-1683
Number of pages5
JournalJournal of Biomechanics
Volume45
Issue number9
DOIs
StatePublished - Jun 1 2012
Externally publishedYes

Fingerprint

Dentin
Nanoindentation
Hydration
Energy Metabolism
Drying
Hardness
Indentation
Biological materials
Energy dissipation
Tissue
Recovery

Keywords

  • Collagen
  • Dentin
  • Energy dissipation
  • Energy expenditure
  • Hardness
  • Nanoindentation

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Rehabilitation
  • Biophysics
  • Biomedical Engineering

Cite this

Influence of hydration on nanoindentation induced energy expenditure of dentin. / Bertassoni, Luiz; Swain, Michael Vincent.

In: Journal of Biomechanics, Vol. 45, No. 9, 01.06.2012, p. 1679-1683.

Research output: Contribution to journalArticle

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