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Adhesive interface and bond strength of endodontic sealers to root canal dentine after immersion in phosphate‐buffered saline
Author(s) -
Tedesco Maybell,
Felippe Mara Cristina Santos,
Felippe Wilson Tadeu,
Alves Ana Maria Hecke,
Bortoluzzi Eduardo Antunes,
Teixeira Cleonice Silveira
Publication year - 2014
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.22430
Subject(s) - adhesive , root canal , dentistry , bond strength , saline , homogeneous , materials science , immersion (mathematics) , chemistry , composite material , medicine , mathematics , layer (electronics) , combinatorics , pure mathematics , endocrinology
This study evaluated the bond strength (BS) and the adhesive interface of four endodontic sealers to root canal dentine, before, and after immersion in phosphate buffered saline (PBS) to simulate an in vivo environment. Eighty roots were instrumented using ProTaper rotatory files, under irrigation with 17% EDTA and 1% NaOCl. Posteriorly were divided into four groups ( n = 20) according to the sealer used: Endofill, AH Plus, Sealapex, and MTA Fillapex. Each group was divided into two subgroups ( n = 10) and stored at 37°C immersed in water for 7 days and in PBS for 60 days. From each subgroup, 1 mm thick sections were obtained. One section of each region (coronal, middle, and apical) was submitted to the push‐out test and failures were observed. Twelve sections of each subgroup (four from each region) were evaluated under SEM. Three‐way ANOVA evaluation for BS showed significant differences between groups and regions ( P < 0.0001), but not between subgroups ( P > 0.05). AH Plus had significantly higher BS than the others sealers, regardless of the analyzed subgroup (Tukey's test, P < 0.5). The most common failures were adhesive to dentine and cohesive of the sealer. The SEM evaluation (Kruskal–Wallis, Mann–Whitney) showed homogeneous adhesive interface formed and sealer tags in all groups with significant statistical differences with AH Plus, regardless of PBS immersion. AH Plus was superior to the other sealers for both BS and quality of interface formation. Immersion in PBS did not interfere on BS or adhesive interface of the sealers tested. Microsc. Res. Tech. 77:1015–1022, 2014 . © 2014 Wiley Periodicals, Inc.