Effect of root canal filling techniques on the bond strength of epoxy resin-based sealers

Abstract

The aim of this study was to evaluate the effects of different root canal filling techniques on the bond strength of epoxy resin-based sealers. Sixty single-rooted canines were prepared using ProTaper (F5) and divided into the following groups based on the root filling technique: Lateral Compaction (LC), Single Cone (SC), and Tagger Hybrid Technique (THT). The following subgroups (n = 10) were also created based on sealer material used: AH Plus and Sealer 26. Two-millimeter-thick slices were cut from all the root thirds and subjected to push-out test. Data (MPa) was analyzed using ANOVA and Tukey's test (α = 0.05). The push-out values were significantly affected by the sealer, filling technique, and root third (p < 0.05). AH Plus (1.37 ± 1.04) exhibited higher values than Sealer 26 (0.92 ± 0.51), while LC (1.80 ± 0.98) showed greater bond strength than THT (1.16 ± 0.50) and SC (0.92 ± 0.25). The cervical (1.45 ± 1.14) third exhibited higher bond strength, followed by the middle (1.20 ± 0.72) and apical (0.78 ± 0.33) thirds. AH Plus/LC (2.26 ± 1.15) exhibited the highest bond strength values, followed by AH Plus/THT (1.32 ± 0.61), Sealer 26/LC (1.34 ± 0.42), and Sealer 26/THT (1.00 ± 0.27). The lowest values were obtained with AH Plus/SC and Sealer 26/SC. Thus, it can be concluded that the filling technique affects the bond strength of sealers. LC was associated with higher bond strength between the material and intraradicular dentine than THT and SC techniques.

Chlorhexidine and proanthocyanidin enhance the long-term bond strength of resin-based endodontic sealer

“…fidelity in results. 24,25,26,27 However, this method is limited by the standardization of specimen positioning, which is essential for reproducibility 8 . In the present study, specimens were positioned upright to the dentinal tubules, which act as a retaining force within the root canal.…”

Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment

“…Topçuoğlu et al 24 used a single cone technique, whereas the present study used lateral compaction. According to Rached-Júnior et al 25 the use of a spreader and accessory gutta-percha cones in the lateral compaction technique created lateral and apical cement dislocation forces that filled the root canal irregularities and dentin tubules differently from a single cone technique. Therefore, it can be assumed that the higher mechanical cement interweaving was related to the increased material removal resistance.…”