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dc.contributor.authorDuarte, Marco Antonio Húngaropt_BR
dc.contributor.authorSó, Marcus Vinicius Reispt_BR
dc.contributor.authorCimadon, Vanessa Buffonpt_BR
dc.contributor.authorZucatto, Cristianept_BR
dc.contributor.authorVier-Pelisser, Fabiana Vieirapt_BR
dc.contributor.authorKuga, Milton Carlospt_BR
dc.date.accessioned2012-03-07T01:20:26Zpt_BR
dc.date.issued2010pt_BR
dc.identifier.issn0103-6440pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/37364pt_BR
dc.description.abstractO objetivo deste estudo foi avaliar a efetividade da instrumentação manual e rotatória na remoção de material obturador de canais radiculares de raízes palatinas de molares superiores humanos, em dois períodos de tempo. Vinte e quatro raízes foram instrumentadas e obturadas com guta-percha, cimento de óxido de zinco e eugenol e armazenadas em solução salina durante 6 anos. Outras 24 raízes foram tratadas da mesma maneira e armazenadas por uma semana. Os canais radiculares foram retratados usando limas manuais ou instrumentos rotatórios do Sistema ProTaper Universal. Radiografias periapicais foram feitas para mensurar a quantidade de material remanescente. Posteriormente as raízes foram clivadas e imagens microscópicas obtidas a partir de um microscópio clínico operatório foram digitalizadas. As imagens foram avaliadas através do software Autocad 2004 e área de material obturador remanescente foi mensurada. A Análise da Variância (Two-way) e o Teste T demonstraram não haver diferenças estatisticamente significantes entre a técnica manual e rotatória na remoção de material obturador. O terço apical mostrou a maior percentagem de remanescentes de material obturador, na análise radiográfica e microscópica quando comparado com os outros terços radiculares. Todos os canais revelaram resíduos de material obturador após o retratamento endodôntico. A análise microscópica foi mais efetiva do que a radiográfica na detecção de remanescente de obturação do canal radicular.pt_BR
dc.description.abstractThe aim of this study was to evaluate the effectiveness of manual and rotary instrumentation techniques for removing root fillings after different storage times. Twenty-four canals from palatal roots of human maxillary molars were instrumented and filled with gutta-percha and zinc-oxide eugenol-based sealer (Endofill) , and were stored in saline for 6 years. Non-aged control specimens were treated in the same manner and stored for 1 week. All canals were retreated using hand files or ProTaper Universal NiTi rotary system. Radiographs were taken to determine the amount of remaining material in the canals. The roots were vertically split, the halves were examined with a clinical microscope and the obtained images were digitized. The images were evaluated with AutoCAD software and the percentage of residual material was calculated. Data were analyzed with two-way ANOVA and Tukey’s test at 5% significance level. There was no statistically significant differences (p>0.05) between the manual and rotary techniques for filling material removal regardless the ageing effect on endodontic sealers. When only the age of the filling material was analyzed microscopically, non-aged fillings that remained on the middle third of the canals presented a higher percentage of material remaining (p<0.05) compared to the aged sealers and to the other thirds of the roots. The apical third showed a higher percentage of residual filling material in both radiographic and microscopic analysis when compared to the other root thirds. In conclusion, all canals presented residual filling material after endodontic retreatment procedures. Microscopic analysis was more effective than radiographs for detection of residual filling material.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofBrazilian dental journal. Ribeirão Preto. Vol. 21, no. 2 (2010), p. 148-152pt_BR
dc.rightsOpen Accessen
dc.subjectEndodonticsen
dc.subjectRetratamento endodônticopt_BR
dc.subjectretreatmenten
dc.subjectgutta-perchaen
dc.titleEffectiveness of rotary or manual techniques for removing a 6-year-old filling materialpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000755156pt_BR
dc.type.originNacionalpt_BR


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