Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment

This study evaluated the removal of filling material with ProTaper Universal Rotary Retreatment system (PTR) combined with solvents and the influence of solvents on the bond strength (PBS) of sealer to intraradicular dentin after canal reobturation. Roots were endodontically treated and distributed...

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Bibliographic Details
Published in:	Brazilian oral research Vol. 31; p. e11
Main Authors:	Palhais, Marcelo, Sousa-Neto, Manoel Damião, Rached-Junior, Fuad Jacob Abi, Amaral, Mariana Carvalho de Andrade, Alfredo, Edson, Miranda, Carlos Eduardo Saraiva, Silva-Sousa, Yara Teresinha Corrêa
Format:	Journal Article
Language:	English
Published:	Brazil Sociedade Brasileira de Pesquisa Odontológica - SBPqO 01-01-2017 Sociedade Brasileira de Pesquisa Odontológica
Subjects:	Analysis of Variance Cyclohexanols - chemistry Dental Bonding Dental Instruments Dental Pulp Cavity - drug effects Dentin - drug effects Dentistry DENTISTRY, ORAL SURGERY & MEDICINE Endodontics Epoxy Resins - chemistry Gutta-Percha Humans Materials Testing Microscopy, Electron, Scanning Monoterpenes - chemistry Plant Oils - chemistry Reproducibility of Results Retreatment Retreatment - instrumentation Root Canal Filling Materials - chemistry Root Canal Preparation - instrumentation Root Canal Preparation - methods Solvents Solvents - chemistry Retreatment Solvents Endodontics
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Summary:	This study evaluated the removal of filling material with ProTaper Universal Rotary Retreatment system (PTR) combined with solvents and the influence of solvents on the bond strength (PBS) of sealer to intraradicular dentin after canal reobturation. Roots were endodontically treated and distributed to five groups (n = 12). The control group was not retreated. In the four experimental groups, canals were retreated with PTR alone or in combination with xylol, orange oil, and eucalyptol. After filling material removal, two specimens of each group were analysed by SEM and µCT to verify the presence of filling remnants on root canal walls. The other roots were reobturated and sectioned in 1-mm-thick dentin slices that were subjected to the push-out test. Data were analysed by two-way ANOVA and Tukey's test (α = 0.05). SEM and µCT analysis revealed that all retreatment techniques left filling remnants on canal walls. The control group (3.47 ± 1.21) presented significantly higher (p < 0.05) PBS than the experimental groups. The groups retreated with PTR alone (2.59 ± 0.99) or combined with xylol (2.54 ± 0.77) and orange oil (2.32 ± 0.93) presented similar bond strength (p > 0.05), and differed significantly from the group with eucalyptol (1.89 ± 0.63). The solvents reduced the PBS of the sealer to dentin and no retreatment technique promoted complete removal of filling material.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1806-8324 1807-3107 1807-3107 1806-8324
DOI:	10.1590/1807-3107BOR-2017.vol31.0011