Distribution of streptococcus mutans and streptococcus sobrinus at sub-sites in human approximal dental plaque

K. Ahmady, Phillip Marsh, H. N. Newman*, J. S. Bulman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The distribution and prevalence of Streptococcus mutans and Streptococcus sobrinus were determined at three sub-sites in human approximal plaque: away from (A), to the side of (S) and below (B) the contact area. Small plaque samples were taken from all three sub-sites on clinically sound approximal surfaces of a single premolar from each of 21 schoolchildren. S. mutans was detected significantly more often and in higher proportions than S. sobrinus from sub-sites A (p = 0.019), S (p = 0.034) and B (p = 0.004). S. mutans was detected in highest proportions from the B site compared to the A site (p = 0.025); there were no significant differences in the isolation frequency or prevalence of S. sobrinus from any of the sub-sites. S. mutans and S. sobrinus were never isolated together from the A sub-sites and were recovered together most commonly from the B sub-sites (p<0.01). It is concluded that S. mutans and S. sobrinus preferentially colonise the most caries-prone site apical to the contact area.

Original languageEnglish
Pages (from-to)135-139
Number of pages5
JournalCaries Research
Volume27
Issue number2
DOIs
Publication statusPublished - 1993

Keywords

  • Approximal plaque
  • Bacterial distribution
  • Streptococcus mutans
  • Streptococcus sobrinus

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