The Sealing Ability of Resilon and Gutta-Percha in Severely Curved Root Canals: An in Vitro Study

Objective: the aim of this study was to compare the apical seal of curved canals obturated with resilon/epiphany with gutta-percha/ah plus.materials and methods: thirty-four extracted human mandibular molars with 25-40 degree canal curvature of the mesial root were selected for this study. after preparation, the mesiobuccal canals were obturated with gutta-percha and ah- plus sealer (group g) or resilon and epiphany sealer (group r). four specimens served as control. microleakage was evaluated after passing 3 and 30 days using the fluid filtration technique. the data were analyzed statistically using parametric tests.results: in the 3-day evaluation, the mean microleakage in group r was signifi-cantly less than in group g (p< 0.05). after 30 days, there was no significant dif-ference between the two groups (p> 0.05). in group g, the leakage values at the end of 30 days were significantly less than values at the end of 3 days. although in group r the mean leakage decreased after 30 days, this reduction was not statis-tically significant.conclusion: resilon/epiphany provided a better seal than gutta-percha/ah-plus in severely curved root canals immediately after obturation, although with the passage of time, resilon/epiphany was equivalent to gutta-percha/ah plus in sealing properties.