Retention strengths of five luting cements on prefabricated dowels after root canal obturation with a zinc oxide/eugenol sealer: 1. Dowel space preparation/cementation at one week after obturation

Abstract

Paraposts cemented with Panavia 21 in unobturated root canals exhibited significantly higher retention than Paraposts luted with Panavia 21 and 4 different cements into dowel spaces prepared 1 week after obturation with gutta percha/ZOE sealer (p <0.001). Among the obturated groups, Panavia 21 cement (group 2) demonstrated significantly greater retention of Paraposts than zinc phosphate (group 4) and Parapost composite (group 5) cements (p <0.001). Ketac-Cem glass ionomer cement (group 3) had intermediate retention values that were not statistically different than those of groups 2, 4, and 5 (p >0.05). The 4-META cement, C&B Metabond, failed to polymerize.

Effects of Three Canal Sealers on Bond Strength of a Fiber Post

“…The present study showed that the highest bond strength was in the control group in which no canal sealer was used (p < 0.001), which agreed with several other studies (18,29). The present study's result was most probably attributable to the open dentin tubule orifices allowing maximum penetration of resin cement after the application of acidic monomer (Fig.…”

“…Most studies have determined that eugenol-based sealers decrease the bond strength of resinous cement (18,19,32,33). In the present study, the eugenol-based sealer group had the lowest bond strength (Table 1), but no significant difference was found between the eugenol and resin-based sealer groups (p > 0.05).…”

“…Numerous studies (19)(20)(21)(22) have shown the inhibiting effect of eugenol on polymerization. Other studies have found no significant difference between eugenol and non-eugenol-containing root canal sealers in the retention of posts using a resin cement (18,23,24).…”

“…However, there have been only a few studies regarding the influence of calcium hydroxide sealers on resin polymerization and post retention. Eugenol-containing sealers remain the primary choice for endodontics because of their long history of clinical success (18). Numerous studies (19)(20)(21)(22) have shown the inhibiting effect of eugenol on polymerization.…”

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

“…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.…”