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Analysis of the interface and bond strength of resin‐based endodontic cements to root dentin
Author(s) -
Haragushiku Gisele Aihara,
Teixeira Cleonice Silveira,
Furuse Adilson Yoshio,
Sousa Yara Terezinha Silva,
De Sousa Neto Manoel Damião,
Silva Ricardo Gariba
Publication year - 2012
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.21107
Subject(s) - dentin , bond strength , adhesive , dentistry , materials science , gutta percha , scanning electron microscope , significant difference , chemistry , nuclear chemistry , composite material , root canal , medicine , layer (electronics)
This study evaluated by scanning electron microscopy the interface between root dentin and resin cements, with or without additional application of a dual‐cured one‐step self‐etching dentin adhesive. In addition, the push‐out bond strength of these materials to dentin was evaluated. Root canals of 50 maxillary human canines were subjected to biomechanical preparation and randomly assigned into five groups ( n = 10) according to the obturation employed: I. AH Plus/gutta‐percha; II. Endo‐REZ/gutta‐percha; III. Epiphany SE/Resilon; IV. Endo‐REZ/gutta‐percha + adhesive; and V. Epiphany SE/Resilon + adhesive. After obturation, two cross sections of 1.0 mm of each third of the root were obtained and analyzed by SEM and push‐out. Data were analyzed by Kruskal–Wallis, Two‐way ANOVA and Tukey's HSD tests (α = 5%). Significant differences occurred between scores for gap parameters and tags; greater tag formation resulted for Epiphany SE ( P < 0.05). There were also significant differences between groups for the bond strength. AH Plus (1.24 ± 0.70) showed higher values ( P < 0.05) compared to groups II (0,17 ± 0.19), III (0.10 ± 0.06), IV (0.09 ± 0.08), and V (0.06 ± 0.03), which were statistically similar ( P > 0.05). There was no significant difference between the root thirds ( P > 0.05). It was concluded that the use of a self‐etching adhesive system did not improve the adhesion of resin‐based sealers to dentin and that AH Plus showed better bond strength when compared to other cements. Microsc. Res. Tech., 2012. © 2011 Wiley Periodicals, Inc.