Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/43359
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dc.contributor.authorVera, J.
dc.contributor.authorSiqueira Jr., J.F.
dc.contributor.authorRicucci, D.
dc.contributor.authorLoghin, S.
dc.contributor.authorFernandez, N.
dc.contributor.authorFlores, B.
dc.contributor.authorCruz, A.G.
dc.date.accessioned2015-09-15T18:33:42Z-
dc.date.available2015-09-15T18:33:42Z-
dc.date.issued2012
dc.identifier.urihttp://www.scopus.com/inward/record.url?eid=2-s2.0-84863983886&partnerID=40&md5=8f46d09f1659d5a2235e5cfe0ea6a26c
dc.identifier.urihttp://hdl.handle.net/20.500.12104/43359-
dc.description.abstractIntroduction: This study analyzed the in vivo microbiological status of the root canal systems of mesial roots of mandibular molars with primary apical periodontitis after 1- or 2-visit endodontic treatment. Methods: Mesial root canals were instrumented by using either a combination of K3 and LightSpeed instruments (mesiobuccal canals) or the ProTaper system (mesiolingual canals), with 5% NaOCl irrigation. Patency files were used. Smear layer was removed, and a final rinse with 5 mL of 2% chlorhexidine was performed. In the 2-visit group (7 roots, 14 canals), canals were medicated with calcium hydroxide for 1 week and then obturated by using the continuous wave of compaction technique. In the 1-visit group (6 roots, 12 canals), canals were immediately obturated after chemomechanical procedures. Teeth were extracted 1 week after root canal instrumentation and processed for histobacteriologic analysis. Results: In the 1-visit group, no case was completely free of bacteria; residual bacteria occurred in the main root canal (5 of 6 cases), isthmus (5 of 6), apical ramifications (4 of 6), and dentinal tubules (5 of 6). In the 2-visit group, 2 cases were rendered bacteria-free; residual bacteria were found in the main canal only in 2 cases (none of them with persistent dentinal tubule infection), in the isthmus (4 of 7 cases), and in ramifications (2 of 7). The 2 instrumentation techniques performed similarly. When filling material was observed in ramifications, it was usually intermixed with necrotic tissue, debris, and bacteria. Conclusions: The 2-visit protocol by using an interappointment medication with calcium hydroxide resulted in improved microbiological status of the root canal system when compared with the 1-visit protocol. Residual bacteria were more frequent and abundant in ramifications, isthmuses, and dentinal tubules when root canals were treated without an interappointment medication. Apical ramifications and isthmuses were never completely filled. The use of an antibacterial interappointment agent is necessary to maximize bacterial reduction before filling. � 2012 American Association of Endodontists.
dc.relation.isreferencedbyScopus
dc.relation.isreferencedbyWOS
dc.titleOne- versus two-visit endodontic treatment of teeth with apical periodontitis: A histobacteriologic study
dc.typeArticle
dc.identifier.doi10.1016/j.joen.2012.04.010
dc.relation.ispartofjournalJournal of Endodontics
dc.relation.ispartofvolume38
dc.relation.ispartofissue8
dc.relation.ispartofpage1040
dc.relation.ispartofpage1052
dc.subject.keyword1-visit endodontics; Calcium hydroxide; endodontic infection; endodontic treatment; sodium hypochlorite
dc.contributor.affiliationVera, J., Department of Endodontics, University of Tlaxcala, Tlaxcala, Mexico; Siqueira Jr., J.F., Department of Endodontics, Faculty of Dentistry, Est�cio de S� University, Rio de Janeiro, Rio de Janeiro, Brazil; Ricucci, D., Cetraro, Italy; Loghin, S., Cetraro, Italy; Fern�ndez, N.; Flores, B., Department of Endodontics, University of Veracruz-UAV, Veracruz, Mexico; Cruz, A.G., Department of Dental Clinics, University of Guadalajara, Guadalajara, Mexico
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