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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleScanning Electron Microscopic Investigation of the Effectiveness of Phosphoric Acid in Smear Layer Removal When Compared with EDTA and Citric Acidpt_BR
dc.contributor.authorPrado, Mpt_BR
dc.contributor.authorGusman, Hpt_BR
dc.contributor.authorGomes, BPFApt_BR
dc.contributor.authorSimao, RApt_BR
unicamp.authorGomes, Brenda P. F. A. Univ Estadual Campinas, Piracicaba Dent Sch, Dept Restorat Dent, Endodont Div,UNICAMP, BR-13414018 Piracicaba, SP, Brazilpt_BR
unicamp.authorPrado, Maira Simao, Renata A. Univ Fed Rio de Janeiro, Dept Met & Mat Engn, Rio De Janeiro, Brazilpt_BR
unicamp.authorGusman, Heloisa Univ Fed Rio de Janeiro, Dept Endodont, Rio De Janeiro, Brazilpt_BR
dc.subjectCitric acidpt_BR
dc.subjectphosphoric acidpt_BR
dc.subjectsmear layerpt_BR
dc.subject.wosSealing Abilitypt_BR
dc.subject.wosRotary Instrumentationpt_BR
dc.subject.wosIrrigating Solutionspt_BR
dc.subject.wos15-percent Edtapt_BR
dc.description.abstractIntroduction: The smear layer adheres to dentinal surface, thus occluding the dentinal tubules. Because this layer disfavors the penetration of irrigant solutions and root canal fillings, it should be removed. The aim of this study was to compare the effectiveness of 37% phosphoric acid with that of 17% EDTA and 10% citric acid in the removal of smear layer. Materials and Methods: Fifty-two maxillary single-rooted human canines were accessed and instrumented. Between each instrument used, the canals were irrigated with sodium hypochlorite. After instrumentation, the teeth were irrigated with distilled water and then divided into groups according to the time and substances employed. The substances used were 17% EDTA, 10% citric acid, and 37% phosphoric acid solution and gel. The experimental time periods were of 30 seconds, 1 minute, and 3 minutes. The samples were prepared and observed by means of scanning electron microscopy. Three photomicrographs (2,000x) were recorded for each sample regarding the apical, middle, and cervical thirds. A score system was used to evaluate the images. Results: None of the substances analyzed in this study was effective for removing the smear layer at 30 seconds. In the 1-minute period, the phosphoric acid solution showed better results than the other substances evaluated. In the 3-minute period, all the substances worked well in the middle and cervical thirds although phosphoric acid solution showed excellent results even in the apical third. Conclusions: These findings point toward the possibility that phosphoric acid solution could be a promising agent for smear layer removal. (J Endod 2011;37:255-258)pt
dc.relation.ispartofJournal Of Endodonticspt_BR
dc.relation.ispartofabbreviationJ. Endod.pt_BR
dc.publisher.cityNew Yorkpt_BR
dc.publisherElsevier Science Incpt_BR
dc.identifier.citationJournal Of Endodontics. Elsevier Science Inc, v. 37, n. 2, n. 255, n. 258, 2011.pt_BR
dc.sourceWeb of Sciencept_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorship1Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
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