Influence of Endodontic Sealer Composition and Time of Fiber Post Cementation on Sealer Adhesiveness to Bovine Root Dentin

Abstract

This study aimed to assess the influence of the type of endodontic sealer (salicylate resin-based sealer vs. two endodontic sealers) and the time of fiber post cementation after root filling on the post adhesion to bovine root dentin. Sixty bovine roots were assigned to six groups (n=10), considering an experimental design with two factors (factorial 3x2): endodontic sealer factor in three levels [epoxy resin-based sealer (AH Plus), eugenol-based sealer (Endofill), and salicylate resin-based sealer plus mineral trioxide aggregate - MTA (MTA Fillapex)] and time for post cementation factor in two levels (immediate post cementation or 15 days after root canal filling). After post cementation, 2-mm-thick slices were produced and submitted to push-out test. The failure modes were analyzed under a 40× stereomicroscope and scored as: adhesive at cement/dentin interface; adhesive at cement/post interface; cement cohesive; post cohesive; dentin cohesive; or mixed. Data were analyzed using two-way ANOVA and Tukey's post-hoc tests (α=0.05). When the fiber posts were cemented immediately after the root canal filling, the bond strengths were similar, independent of the endodontic sealer type. However, after 15 days, the epoxy resin-based sealer presented higher bond strength than the other sealers (p<0.05). Comparison between each sealer in different experimental times did not reveal any differences. The main failure type was adhesive at dentin/cement interface (89.4%). The time elapsed between the root canal filling and post cementation has no influence on post/root dentin adhesion. On the contrary, the type of endodontic sealer can influence the adhesion between fiber posts and root dentin.

Influence of Eugenol-based Sealers on Push-out Bond Strength of Fiber Post Luted with Resin Cement: Systematic Review and Meta-analysis

“…After the full-text reading of 10 studies, 1 was excluded (11) because of thermocycling samples before the bond strength test. At the final screening, 9 studies (22,24,(28)(29)(30)(31)(32)(33)(34) were included in the meta-analysis (Fig. 1).…”

“…However, it is unclear if the presence of eugenol impairs post retention. Some authors performing different methodologies found a reduction in the retentive capacity of posts cemented after the use of a eugenol-based sealer (11,(17)(18)(19)(20)(21), whereas others did not observe this change (22)(23)(24)(25). Thus, the aim of this study was to systematically review the literature and perform meta-analysis on the influence of eugenol on the bond strength of posts luted to root canals evaluated by the push-out test.…”

Comparative evaluation of push-out bond strength of a MTA-based root canal sealer

“…They also found higher bond strength values for epoxy resin-based cements, like AH Plus, compared with zinc oxide-eugenol sealers, like Endo Fill. Several other studies also found that the push-out bond strength of AH Plus was superior to that of other root canal sealers [27][28][29] .…”

Evaluation of Bone Tissue Response to a Sealer Containing Mineral Trioxide Aggregate

“…This sealer is composed of salicylate resin, resin diluent, natural resin, bismuth oxide, silica nanoparticles, and MTA. Its physical properties (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23) and biocompatibility (24,25) are already known. Nonetheless, to date, no studies have been conducted to analyze histologically the effect of MTA Fillapex in direct contact with bone tissue.…”