"Red complex" (Bacteroides forsythus, Porphyromonas gingivalis, and Treponema denticola) in endodontic infections: a molecular approach

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
I N RôçasA M Coelho

Abstract

The "red complex," composed of Bacteroides forsythus, Porphyromonas gingivalis, and Treponema denticola, is implicated in severe forms of periodontal diseases. The purpose of this study was to assess the occurrence of the red complex in root canal infections through the use of a sensitive technique-the 16S rDNA-directed polymerase chain reaction (PCR). Samples were obtained from 50 necrotic pulps with periradicular pathosis. Ten cases were diagnosed as acute periradicular abscesses. DNA was extracted from the samples and analyzed with a PCR-based identification assay. At least 1 member of the red complex was found in 33 of 50 cases. T denticola, P gingivalis, and B forsythus were detected in 44%, 30%, and 26% of the cases, respectively. The red complex was found in 4 of 50 cases. No particular signs or symptoms were associated with the presence of these bacterial species. Despite what is indicated in reports with respect to marginal periodontitis, red complex bacteria-either singularly or collectively-was not associated with any particular pattern of clinical symptoms. However, because the bacterial species from the red complex are recognized oral pathogens, their occurrence in root canal infections suggests that they may play ...Continue Reading

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Citations

Jun 12, 2003·Journal of Dentistry·José F Siqueira, Isabela N Rôças
Oct 13, 2001·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·J F SiqueiraA P Colombo
Feb 28, 2002·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·José F SiqueiraHélio P Lopes
Sep 27, 2002·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·José F Siqueira
Dec 24, 2002·Infection and Immunity·Lianrui ChuJefferey L Ebersole
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Apr 22, 2017·Periodontology 2000·Ilan Rotstein
Jun 20, 2003·Journal of Endodontics·José F Siqueira, Isabela N Rôças

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