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Bacteria invading periapical cementum

T Kiryu1, E Hoshino, M Iwaku

  • 1Department of Operative Dentistry and Endodontics, Niigata University School of Dentistry, Japan.

Journal of Endodontics
|April 1, 1994
PubMed
Summary
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Bacteria can invade human tooth cementum from nearby lesions, primarily anaerobic bacteria. This invasion may contribute to chronic periapical pathosis, highlighting the role of oral microorganisms in dental disease.

Area of Science:

  • Microbiology
  • Endodontics
  • Dental Pathology

Background:

  • Periapical lesions are common in endodontic disease.
  • The microbial invasion of cementum is not fully understood.
  • Understanding microbial entry into cementum is crucial for treating chronic periapical pathosis.

Purpose of the Study:

  • To investigate the invasion of human periapical cementum by microorganisms.
  • To identify the types of bacteria present in cementum adjacent to periapical lesions.

Main Methods:

  • Samples of cementum were obtained from 10 human tooth roots during apicoectomy.
  • Standard anaerobic procedures were used for bacterial isolation.
  • Samples were incubated under both anaerobic and aerobic conditions.

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Main Results:

  • Bacteria were recovered from 2 out of 10 cementum samples.
  • All successfully isolated bacteria were anaerobic or aerotolerant.
  • Isolated bacteria included Prevotella, Peptostreptococcus, Eubacterium, Fusobacterium, and Campylobacter species.

Conclusions:

  • Bacteria can invade periapical cementum from adjacent periapical lesions.
  • Anaerobic bacteria are implicated in cementum invasion.
  • These findings suggest a role for invading bacteria in the pathogenesis of chronic periapical lesions.