| Texto completo | |
| Autor(es): |
Delboni, Maraisa G.
;
Gomes, Brenda P. F. A.
;
Francisco, Priscila A.
;
Teixeira, Fabricio B.
;
Drake, David
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF ENDODONTICS; v. 43, n. 3, p. 377-382, MAR 2017. |
| Citações Web of Science: | 7 |
| Resumo | |
Introduction: The aim of this study was to evaluate the diversity and similarity of Enterococcus faecalis genotype isolates from multiple oral sites using repetitive sequence-based polymerase chain reaction and arbitrarily primed polymerase chain reaction (AP-PCR). Methods: Forty-two endodontically treated teeth with apical periodontitis were selected. A total of 126 microbial samples were collected from 3 different sites (saliva, pulp chamber, and root canals, all n = 42) during the nonsurgical retreatment procedures. After growth on m-Enterococcus agar, the colonies were isolated, characterized as gram-positive catalase negative cocci, and identified using an API 20 Strep kit (bioMerieux, MarcyI'Etoile, France). Seventy-four colonies from 10 patients were confirmed as E. faecalis by polymerase chain reaction (165 ribosomal RNA). Repetitive sequence-based polymerase chain reactions using ERIC and AP-PCR using RW3A primers were performed in all 74 colonies. Fingerprints were analyzed and separated into genotypic groups based on the Dice coefficient percentage of similarity (82% or greater) as determined by ERIC reproducibility assays involving E. faecalis controls. Results: Seven different E. faecalis genotypes (GTs) (GT1 = 27%, GT2 = 17.6%, GT3 = 1.3%, GT4 = 18.9%, GT5 = 9.5%, GT6 = 14.9%, and GT7 = 10.8%) were observed in different subjects and oral sites associated with endodontic failure. Remarkably, in 4 of 5 patients, the same GTs present in the infected root canals were also isolated from either the pulp chamber or the saliva samples. In particular, GT6 was detected in all 3 oral sites of patient 37. Conclusions: E. faecalis GTs isolated from saliva, the pulp chamber, and the root canal were similar using the Rep-PCR and AP-PCR methods. These findings suggest that coronal microleakage is a conceivable cause of endodontic failure. (AU) | |
| Processo FAPESP: | 15/19215-2 - Detecção de micro-organismos e de seus fatores de virulência na saliva, câmara pulpar e canal radicular de dentes associados ao insucesso endodôntico |
| Beneficiário: | Priscila Amanda Francisco |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |