Caries progression and inhibition in human and bovine root dentine in situ

A. T. Hara, C. S. Queiroz, A. F. Paes Leme, M. C. Serra, Jaime A. Cury

Research output: Contribution to journalArticle

92 Scopus citations


Since the use of bovine instead of human dentine to evaluate cariogenic and anticariogenic substances is not well established, this in situ study was conducted. Eleven volunteers wore palatal acrylic devices containing 4 dentine slabs (2 human and 2 bovine). Sucrose solution (20%) was dripped over all slabs 4 times a day, simulating a cariogenic challenge. Dentifrice slurries, fluoridated or not, were dripped over specified dentine slabs 3 times a day to evaluate caries reduction. After 14 days, the biofilm formed on the dentine slabs was collected for microbiological analysis. In dentine, mineral loss (ΔZ) and lesion depth (LD) were determined by cross-sectional microhardness and by polarized light microscopy, respectively. The total streptococci and mutans streptococci counts in the biofilm formed either on human or on bovine slabs, whether treated or not with fluoride dentifrice, were not statistically different. The ΔZ and the LD values of dentine treated with fluoride dentifrice were significantly lower than the values of dentine treated with non-fluoride dentifrice. The differences in the ΔZ and LD values between the human and bovine dentine were not statistically significant. The results suggest that bovine dentine can be used instead of human to evaluate caries development and inhibition.

Original languageEnglish (US)
Pages (from-to)339-344
Number of pages6
JournalCaries research
Issue number5
StatePublished - Sep 1 2003
Externally publishedYes


  • Bovine dentine
  • Dentifrice
  • Fluoride
  • Human dentine
  • Root caries

ASJC Scopus subject areas

  • Dentistry(all)

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  • Cite this

    Hara, A. T., Queiroz, C. S., Paes Leme, A. F., Serra, M. C., & Cury, J. A. (2003). Caries progression and inhibition in human and bovine root dentine in situ. Caries research, 37(5), 339-344.