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Published on: July 21, 2014
A micro-computed tomographic analysis of obturation quality and retreatability of an epoxy resin-based sealer
Roula S Abiad1, Prasanna Neelakantan2, Ivan Buscema3
1Division of Endodontology, Faculty of Dentistry, Beirut Arab University, Beirut, Lebanon.
Background:
To evaluate the voids percentage and the retreatability by different supplementary irrigation techniques of a matched-taper single cone and epoxy resin-based sealer.
Methods:
A total of 72 single-rooted premolars were prepared and filled with gutta-percha and MM-Seal. The percentage of voids in the whole root canal and each anatomical part were evaluated by Micro-CT scans. After root filling removal, the teeth were randomly allocated (N.=24) to group A, syringe irrigation; group B, Tornado Brush, and group C, ultrasonically activated irrigation and re-scanned to establish the volume of remnant root filling material. The data relative to voids and retreatment techniques were established by the Kruskal-Wallis test. Differences in retreatment time were examined using one-way ANOVA and Tukey's Test (P<0.05).
Results:
No significant difference was found in the voids percentage between the different root-thirds and between the supplementary irrigation groups in the MM-Seal remnants for the whole root canal and each section. In all groups, the coronal region exhibited more remaining material than other sections.
Conclusions:
MM-Seal showed low voids percentage and its removal was not significantly improved by supplementary irrigation techniques.
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