Effect of freeze-thaw cycles on load transfer between the biomineral and collagen phases in bovine dentin

A. C. Deymier-Black*, J. D. Almer, D. R. Haeffner, D. C. Dunand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Stabilization of biological materials by freezing is widespread in the fields of medicine and biomaterials research and yet, in the case of hard biomaterials such as dentin, there is not a good understanding of how such treatments might affect the mechanical properties. The freezing and thawing may have a number of different effects on dentin including formation of cracks in the microstructure and denaturation of the collagen. Using high-energy synchrotron X-ray diffraction, the apparent moduli of bovine dentin samples were measured before and after various numbers of freeze-thaw cycles. It was determined that repeated freezing and thawing has no measurable effect on the hydroxyapatite or fibrillar apparent moduli up to 10 cycles. This confirms that the use of low temperature storage for stabilization of dentin is reasonable in cases where stiffness is a property of importance.

Original languageEnglish (US)
Pages (from-to)1423-1428
Number of pages6
JournalMaterials Science and Engineering C
Volume31
Issue number7
DOIs
StatePublished - Oct 10 2011

Keywords

  • Dentin
  • Elastic properties
  • Freezing
  • Synchrotron
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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