Tensile strength of mineralized/demineralized human normal and carious dentin

Y. Nishitani, M. Yoshiyama, F. R. Tay, B. Wadgaonkar, J. Waller, K. Agee, D. H. Pashley

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The bond strengths of resins to caries-affected dentin are low. This could be due to weakened organic matrix. The purpose of this work was to determine if the ultimate tensile strength (UTS) of excavated carious dentin is weaker than that of normal dentin. Soft caries was excavated from extracted human molars, and the tooth was vertically sectioned into slabs. Each slab was trimmed to an hourglass shape, parallel or perpendicular to the tubule direction. Half of the specimens were mineralized, while the other half were completely demineralized in EDTA. ANOVA on ranks showed that the three-factor interactions (mineralization, caries, tubule direction) were all significant (p < 0.0001), indicating that mineralization and tubule direction gave different UTS results in normal and caries-affected dentin. No significant differences were seen between the UTS of normal and and that of caries-affected demineralized dentin in the parallel or perpendicular group. The matrix of demineralized caries-affected dentin was as strong as that of normal demineralized dentin when tested in the same direction.

Original languageEnglish
Pages (from-to)1075-1078
Number of pages4
JournalJournal of dental research
Volume84
Issue number11
DOIs
Publication statusPublished - Nov 2005

Keywords

  • Caries
  • Dentin
  • Dentinal tubules
  • Tensile strength

ASJC Scopus subject areas

  • Dentistry(all)

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    Nishitani, Y., Yoshiyama, M., Tay, F. R., Wadgaonkar, B., Waller, J., Agee, K., & Pashley, D. H. (2005). Tensile strength of mineralized/demineralized human normal and carious dentin. Journal of dental research, 84(11), 1075-1078. https://doi.org/10.1177/154405910508401121