Effect of calcium silicate-based endodontic sealer on the retention of fiber posts cemented at different time intervals.
Saudi Dent J
Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Published: November 2021
Objective: To evaluate the effect of BC HiFlow, a new calcium silicate-based endodontic sealer, compared with a resin epoxy-based sealer after 2 different times of cementation on the pull-out bond strength of glass-fiber-reinforced composite posts cemented with a self-adhesive resin cement (RelyX Unicem).
Methodology: Sixty human maxillary central incisors were decoronated, prepared and obturated with gutta-percha and sealer. Roots were distributed into 5 groups according to the sealer and time of post cementation: (1) AH Plus sealer with immediate post fixation, (2) BC HiFlow with immediate post fixation, (3) AH Plus and post fixation after 7 days, (4) BC HiFlow and post fixation after 7 days, and (5) fiber post fixation in canals obturated with gutta-percha only (no sealer). After 1 week of post cementation, the pull-out test was performed and the failure mode was examined under a digital microscope. Data were analyzed using ANOVA followed by Tukey's post hoc and tests (p < .05).
Results: With immediate post cementation, AH Plus group showed significantly higher pull-out retentive strength than the BC HiFlow and control groups (p = .009 and p < .001, respectively). There was no significant difference between the groups when the posts were cemented 7 days after obturation (p = .726). The time of post cementation had a significant influence on the canals obturated with AH Plus (p = .003). The time did not significantly affect the canals obturated with BC HiFlow (p = .289). The prominent type of failure was mixed mode in all groups.
Conclusion: BC HiFlow sealer did not affect the pull-out bond strength of glass-fiber-reinforced composite posts cemented with a self-adhesive resin cement immediately after or 7 days after obturation. For immediate post cementation, AH Plus increased the pull-out bond in comparison to BC HiFlow.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8589580 | PMC |
| http://dx.doi.org/10.1016/j.sdentj.2020.04.002 | DOI Listing |
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