[논문]Microorganisms isolated from root canals presenting necrotic pulp and their drug susceptibility in vitro

Lana, M. A.; Ribeiro‐; Sobrinho, A. P.; Stehling, R.; Garcia, G. D.; Silva, B. K. C.; Hamdan, J. S.; Nicoli, J. R.; Carvalho, M. A. R.; Farias, L. de M.

doi:10.1034/j.1399-302x.2001.016002100.x

Microorganisms isolated from root canals presenting necrotic pulp and their drug susceptibility in vitro

Oral microbiology and immunology, v.16 no.2, 2001년, pp.100 - 105

Lana, M. A. , Ribeiro‐Sobrinho, A. P. , Stehling, R. , Garcia, G. D. , Silva, B. K. C. , Hamdan, J. S. , Nicoli, J. R. , Carvalho, M. A. R. , Farias, L. de M.

Abstract ▼ AI-Helper

The knowledge about causative agents involved in endodontic infections is increasing, especially due to the improvement of culture techniques for anaerobic bacteria, showing that these microorganisms are predominant in this pathology. In this study, 31 canals with pulp necrosis were microbiologically analyzed before and after manipulation. Obligate and facultative anaerobes, microaerophilic bacteria and yeasts were recovered from 24, 14, 5 and 2 clinical specimens, respectively. The most frequent genera were Prevotella, Fusobacterium, Lactobacillus, Streptococcus, Clostridium and Peptostreptococcus for bacteria and Candida and Saccharomyces for yeasts. Strong positive associations, using an odds ratio system, were found between Clostridium and Prevotella and between Peptostreptococcus and Fusobacterium. Even after the instrumentation and the use of Ca(OH)2, facultative anaerobes were detected in two root canals and yeasts in three. Microorganisms were isolated from seven canals at the end of the endodontic treatment: facultative anaerobes from five and yeasts from one. The microbiological evaluation of root canals with pulp necrosis suggests the presence of polymicrobial infections, mainly involving obligate anaerobes, and shows that the infection may persist after treatment.

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Microorganisms isolated from root canals presenting necrotic pulp and their drug susceptibility in vitro

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