Utilize este identificador para citar ou criar um atalho para este documento: http://hdl.handle.net/10923/833
Tipo: article
Título: Effectiveness of rotary or manual techniques for removing a 6-year-old filling material
Autor(es): Duarte, Marco Antônio Húngaro
Só, Marcus Vinicius Reis
Cimadon, Vanessa Buffon
Zucatto, Cristiane
Vier-Pelisser, Fabiana Vieira
Kuga, Milton Carlos
Editora: Dental Foundation of Ribeirão Preto
Data de Publicação: 2010
Volume: 21
Número: 2
Página Inicial: 148
Página Final: 152
Palavras-chave: ENDODONTICS
RETREATMENT
GUTTA PERCHA
ODONTOLOGIA
ENDODONTIA
Resumo: The 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.
URI: http://hdl.handle.net/10923/833
DOI: 10.1590/S0103-64402010000200010
PMID: 20640362
ISSN: 0103-6440
Aparece nas Coleções:Artigo de Periódico

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