An in vitro comparision of apical leakage in immediate versus delayed post space preparation using EndoREZ and RoekoSeal root canal sealers

Abstract

Context: The newer resin and silicone-based sealers have a shorter setting time when compared to conventional zinc oxide-based sealers. This factor may influence the effect of the timing of post space preparation on the integrity of remaining apical root canal filling. Aims: The purpose of this study was to evaluate the apical dye leakage of samples obturated with EndoREZ and RoekoSeal root canal sealers with reference to the timing (immediate and delayed) of post space preparation. Settings and Design: An in vitro study using extracted human teeth as study samples and the method of apical dye penetration to determine the apical micro-leakage microscopically. Materials and Methods: Seventy single-rooted anterior extracted teeth were instrumented and divided into ix groups; fifteen teeth in groups 1, 2, 3, and 4 and five teeth in groups 5 and 6. In groups 1 and 2, specimens were obturated with warm vertical compaction and EndoREZ sealer. In groups 3 and 4, specimens were obturated with warm vertical compaction and RoekoSeal sealer. Immediate post space was prepared in groups 1 and 3. The samples in groups 2 and 4, the post space was prepared after placing the teeth in saline at 37°C for 1 week. Groups 5 and 6 represented positive and negative controls, respectively. The samples were then placed in methylene blue for 72 hours. The samples were then sectioned longitudinally and the amount of linear apical dye migration was evaluated. Statistical Analysis Used: One-way analysis of variance (ANOVA) and multiple pair-wise comparisions using Tukeys multiple post hoc procedures. Results: There was a statistically significant difference in the mean apical dye micro-leakage values in between the EndoREZ and RoekoSeal groups, i. e., groups 1, 2 and groups 3, 4. Conclusions: EndoREZ root canal sealer groups exhibited a higher mean apical dye micro-leakage value as compared to the RoekoSeal root canal sealer groups. Immediate post space preparation resulted in a relatively lower mean apical dye micro-leakage as compared to delayed post space preparation, but the difference was not statistically significant.