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dc.typeArtigo de periódicopt_BR
dc.titleMicroorganisms From Canals Of Root-filled Teeth With Periapical Lesions.pt_BR
dc.contributor.authorPinheiro, E Tpt_BR
dc.contributor.authorGomes, B P F Apt_BR
dc.contributor.authorFerraz, C C Rpt_BR
dc.contributor.authorSousa, E L Rpt_BR
dc.contributor.authorTeixeira, F Bpt_BR
dc.contributor.authorSouza-Filho, F Jpt_BR
unicamp.authorE T Pinheiro, Endodontic Department, Piracicaba Dental School, State University of Campinas, UNICAMP, Piracicaba, SP, Brazil.pt_BR P F A Gomes,pt C R Ferraz,pt L R Sousa,pt B Teixeira,pt J Souza-Filho,pt
dc.subjectBacteria, Anaerobicpt_BR
dc.subjectBacterial Typing Techniquespt_BR
dc.subjectChi-square Distributionpt_BR
dc.subjectDental Cariespt_BR
dc.subjectDental Pulp Cavitypt_BR
dc.subjectDental Restoration Failurept_BR
dc.subjectGram-positive Bacteriapt_BR
dc.subjectPeriodontal Diseasespt_BR
dc.subjectRoot Canal Obturationpt_BR
dc.description.abstractThe objective of the present study was to identify the microbial flora within root canals of teeth with failed root-canal treatment and to determine the association of the various species with clinical features. Sixty root-filled teeth with persisting periapical lesions were selected for this study. During nonsurgical endodontic re-treatment, the root-filling material was removed and the canals were sampled. Microbial sampling, isolation and species determination were performed using advanced microbiological techniques for anaerobic species. The association of microbiological findings with clinical features was investigated. Microorganisms were recovered from 51 teeth. In most cases, one or two strains per canal were found. Of the microbial species isolated, 57.4% were facultative anaerobic species and 83.3% Gram-positive microorganisms. Enterococcus faecalis was the most frequently recovered bacterial species. Obligate anaerobes accounted for 42.6% of the species and the most frequently isolated genera was Peptostreptococcus. which was associated with clinical symptoms (P < 0.01). Significant associations were also observed between: (a) pain or history of pain and polymicrobial infections or anaerobes (P < 0.05): (b) tenderness to percussion and Prevotella intermedia/P. nigrescens (P < 0.05); (c) sinus and Streptococcus spp. (P < 0.001) or Actinomyces spp. (P < 0.01); (d) coronally unsealed teeth and Streptococcus spp. or Candida spp. (both with P < 0.01). The microbial flora in canals after failure of root-canal treatment were limited to a small number of predominantly Gram-positive microbial species. Facultative anaerobes, especially E. faecalis, were the most commonly isolated microorganisms, however, polymicrobial infections and obligate anaerobes were frequently found in canals of symptomatic root-filled teeth.en
dc.relation.ispartofInternational Endodontic Journalpt_BR
dc.relation.ispartofabbreviationInt Endod Jpt_BR
dc.identifier.citationInternational Endodontic Journal. v. 36, n. 1, p. 1-11, 2003-Jan.pt_BR
dc.description.provenanceMade available in DSpace on 2015-11-27T12:52:45Z (GMT). No. of bitstreams: 1 pmed_12656508.pdf: 195419 bytes, checksum: 5e40469cb29f5fef6cc4218b9be31f5b (MD5) Previous issue date: 2003en
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