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Evaluation of the push-out bond strength of root canal obturation materials filled by four different obturation techniques

Authors: Saif N, --- Nawal A. Al Sabawi نوال السبعاوي --- Maha M. Yahya مها يحيى
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 2 Pages: 37-43
Publisher: Baghdad University جامعة بغداد


Background: The aim of this study was to comparatively evaluate the push out bond strength (PBS) of root canalfillings using four different obturation techniques (single cone (SC), cold lateral compaction (CLC), continuous wave(CW), and carrier based gutta percha (CBG)).Materials and Methods: Forty mandibular premolar decoronated and instrumented with rotary ProTaper to F3 thenteeth were divided randomly into 4 groups of 10 teeth for each as follow: group (I) single- cone obturation withmatched-taper gutta-percha, group (II) cold lateral compaction technique, group (III) continuous wave ofobturation technique, and group( IV) carrier based gutta-percha technique. Zinc oxide eugenol (ZOE) sealer wasused as a root canal sealer for the four groups. After obturation of the root canals, all the roots were sectionedhorizontally at three levels in the apical, middle, and cervical thirds of each group. PBS test was performed usingdigital universal testing machine. Mode of failures was evaluated using digital stereomicroscope (40 X). Collecteddata were analyzed statistically using one way ANOVA and Tukey test.Results: PBS of CW and CBG significantly higher than SC and CLC, but significantly there were no differencesbetween CW and CBG, and between SC and CLC.Conclusion: Under the condition of this study it can be concluded that thermoplasticized techniques obtain superiorPBS of the filling materials in comparisons with cold gutta percha obturation techniques

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