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Influence of drying protocol with isopropyl alcohol on the bond strength of resin-based sealers to the root dentin
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Dias, Kléber Campioni, Soares, Carlos José, Steier, Liviu, Versiani, Marco Aurélio, Abi Rached-Júnior, Fuad Jacob, Pécora, Jesus Djalma, Correa Silva-Sousa, Yara Terezinha and de Sousa-Neto, Manoel Damião (2014) Influence of drying protocol with isopropyl alcohol on the bond strength of resin-based sealers to the root dentin. Journal of Endodontics, Volume 40 (Number 9). pp. 1454-1458. doi:10.1016/j.joen.2014.02.021 ISSN 0099-2399.
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Official URL: http://dx.doi.org/10.1016/j.joen.2014.02.021
Abstract
Introduction
This study compared the bond strength, interfacial ultrastructure, and tag penetration of resin-based sealers applied to smear-free radicular dentin using 70% isopropyl alcohol as the active final rinse.
Methods
Eighty root canals were prepared and assigned to 2 groups (n = 40) according to the drying protocol: paper points or 70% isopropyl alcohol. Then, roots were divided into 4 subgroups (n = 10) with respect to the sealer and obturation material: AH Plus (Dentsply De Trey GmbH, Konstanz, Germany) and gutta-percha (AH/GP), Hybrid Root SEAL (Sun Medical, Tokyo, Japan) and gutta-percha (HR/GP), Epiphany SE (Pentron Clinical Technologies, Wallingford, CT) and gutta-percha (EP/GP), and Epiphany SE and Resilon (EP/RS). Roots were sectioned, and the push-out test was performed. Failure modes were examined under stereomicroscopy and sealer penetration into the dentinal tubules under scanning electron microscopy. Data were statistically analyzed by 2-way analysis of variance post hoc Tukey tests with a significant level of 5%.
Results
Overall, canals dried with isopropyl alcohol showed significantly higher bond strength values (2.11 ± 1.74 MPa) than with paper points (1.81 ± 1.73 MPa) (P < .05). The HR/GP group showed lower bond strength than the AH/GP group (P < .05) but higher than the EP/GP and EP/RS groups (P < .05). The most frequent type of failure was cohesive in the AH/GP and HR/GP groups and adhesive in the EP/GP and EP/RS groups. Scanning electron microscopic evaluation revealed better adaptation of the adhesive interface in the AH/GP and HR/GP groups in comparison with the EP/GP and EP/RS groups.
Conclusions
A final rinse with EDTA and 70% isopropyl alcohol improved the bond strength and penetration of the sealers into dentinal tubules of the root.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School | ||||||
Journal or Publication Title: | Journal of Endodontics | ||||||
Publisher: | Elsevier | ||||||
ISSN: | 0099-2399 | ||||||
Official Date: | September 2014 | ||||||
Dates: |
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Volume: | Volume 40 | ||||||
Number: | Number 9 | ||||||
Page Range: | pp. 1454-1458 | ||||||
DOI: | 10.1016/j.joen.2014.02.021 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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