Comparative evaluation of pushout bond strength with single cone obturation and cold lateral compaction techniques using bio-ceramic and resin-based sealers: An in vitro study

ABSTRACT Background: Successful root canal treatment depends on strong adhesion between the sealer and root dentin to prevent microleakage. Different sealers and obturation techniques influence this bond strength. Aim: This study aimed to compare the pushout bond strength (PBS) of a bio-ceramic sealer (BioRoot RCS) and a resin-based sealer (AH-plus) using two obturation techniques: single cone obturation (SCO) and cold lateral compaction (CLC). Materials and Methods: Eighty freshly extracted single-rooted human teeth were decoronated and prepared using rotary instrumentation. The specimens were randomly divided into four groups ( n = 20 each). After obturation, 1 mm thick slices from the mid-root area were prepared and tested for PBS using a Universal Testing Machine. Statistical analysis was performed using one-way ANOVA and Tukey’s post hoc test, with significance set at P < 0.05. Results: Significant differences in PBS were found among the groups ( P < 0.05). Group 4 (AH-plus + CLC) showed the highest bond strength, followed by Group 2 (BioRoot RCS + CLC), Group 3 (AH-plus + SCO), and Group 1 (BioRoot RCS + SCO). CLC significantly improved bond strength for both sealers. Conclusion: CLC enhances PBS for both bio-ceramic and resin-based sealers. While AH-plus showed superior bond strength overall, BioRoot RCS also performed well, particularly with CLC. Sealer and technique selection should consider their combined influence on clinical success.