Effects of subgingival irrigation on A. actinomycetemcomitans

U. M. Wikesjö, H. S. Reynolds, L. A. Christersson, J. J. Zambon, R. J. Genco

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8 Scopus citations


Abstract The effects of repeated subgingival irrigation on Actinobacillus actinomycetemcomitans was examined. 24 periodontal pockets harboring A, actinomycetemcomitans in 3 juvenile and 4 adult periodontitis patients were studied. The protocol included bi‐weekly subgingival irrigation with hydrogen peroxide of the periodontal sites until the micro‐organism was no longer detected by selective culture, or for 6 months. A. actinomycetemcomitans was gradually suppressed to below detection following the irrigation regime and could no longer be detected in 46% of the sites at completion of the irrigation protocol. The sites were microbiologically re‐examined 5 months after cessation of the irrigation regime. A. actinomycetemcomitans re‐occurred in only 2 of the sites from which it had originally been suppressed below detection. The results indicate: (1) that the irrigation regime tested has some potential to suppress A. actinomycetemcomitans in periodontal pockets; (2) that the effect of the irrigation protocol generally lasted for 5 months; (3) that the reduction rate of A. actinomycetemcomitans to below detectable levels seems related to the initial number of cultivable bacteria from the periodontal pocket.

Original languageEnglish (US)
Pages (from-to)116-119
Number of pages4
JournalJournal of Clinical Periodontology
Issue number2
StatePublished - Feb 1989


  • antimicrobial irrigation, Actinobacillus actinomycetemcomitans
  • hydrogen peroxide
  • periodontitis

ASJC Scopus subject areas

  • Periodontics


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