A big role for the very small: understanding endodontic microbial flora
2007 (English)In: Australian dental journal, ISSN 0045-0421, E-ISSN 1834-7819, Vol. 52, no Suppl 1, S38-S51 p.Article, review/survey (Refereed) PublishedText
Apical periodontitis, an inflammatory process around the apex of a tooth root, is primarily a sequel to microbial infection of the pulp space. The microbial flora is composed of a restricted group of the total oral flora, selected by environmental pressures of anaerobiosis, nutrition and competition with other species and inhabits the root canal as a biofilm of coaggregated communities in an extracellular matrix. The untreated infected canal is generally composed of a polymicrobial mix with approximately equal proportions of Gram-positive and Gram-negative species, dominated by obligate anaerobes. The type of microbial flora in the root-filled tooth with persistent apical periodontitis has very different characteristics. These infections are characterized by one or just a few species, predominantly Grampositive micro-organisms with an equal distribution of facultative and obligate anaerobes. Enterococcus faecalis has been a conspicuous finding in most studies. Because the primary aetiological problem is infection, endodontic treatment is directed at control and elimination of the root canal flora by working in a sterile way. Based on current knowledge, the best available method for obtaining clean, microbe-free root canals is by instrumentation with antimicrobial irrigation reinforced by an intracanal dressing with calcium hydroxide.
Place, publisher, year, edition, pages
Sydney: Australian dental association , 2007. Vol. 52, no Suppl 1, S38-S51 p.
root canal flora, ecological niche, antibacterial treatment, root canal preparation, root canal irrigants
IdentifiersURN: urn:nbn:se:umu:diva-118213DOI: 10.1111/j.1834-7819.2007.tb00524.xISI: 000246114200006PubMedID: 17546861OAI: oai:DiVA.org:umu-118213DiVA: diva2:918374