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The endodontic microflora revisited.

D B Drucker1, J D Lilley, D Tucker

  • 1Department of Cell and Structural Biology, Turner Dental School, University of Manchester, Great Britain.

Microbios
|January 1, 1992
PubMed
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Dental root canals harbor diverse bacteria, with obligate anaerobes being most common. Specific bacterial species show significant associations, highlighting potential interactions within the root canal microbial community.

Area of Science:

  • Microbiology
  • Endodontics
  • Dental Research

Background:

  • The oral microbiome plays a critical role in dental health and disease.
  • Understanding the microbial flora within root canals is essential for effective endodontic treatment.

Purpose of the Study:

  • To investigate the microbial composition of human dental root canals.
  • To identify prevalent bacterial species and analyze inter-species associations within root canal infections.

Main Methods:

  • Analysis of microbial flora from 35 dental root canals.
  • Culturing techniques to maintain obligate anaerobe viability.
  • Species identification and prevalence calculation.

Main Results:

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  • Obligate anaerobes constituted 45% of isolates; streptococcal species represented 24%.
  • A total of 40 different bacterial species were identified.
  • Streptococcus sanguis and Peptostreptococcus micros were the most prevalent (23% each), followed by Eubacterium aerofaciens and the 'Streptococcus milleri group' (17%).
  • Significant associations were found between Prevotella melaninogenica and Peptostreptococcus micros/Prevotella oralis, Prevotella corporis and Streptococcus morbillorum, and Actinomyces odontolyticus and Enterococcus faecalis.

    • Conclusions:

    • Dental root canals host a complex microbial community dominated by anaerobes.
    • Specific bacterial species exhibit non-random co-occurrence patterns, suggesting synergistic or antagonistic relationships.
    • These findings contribute to understanding endodontic polymicrobial infections.