title: Effects of different light-curing units and obturation techniques on the seal of the Resilon/Epiphany system.
abstract: The purpose of this study was to compare the sealing ability of a resin- and polymer-based root canal obturation system (Resilon; Resilon Research LLC, Madison, CT/Epiphany; Clinical Technologies, Wallingford, CT) used in conjunction with different light-curing units and obturation techniques. A total of 120 decrowned single-rooted human teeth were used. After preparation of the root canals with 0.06 taper nickel-titanium rotary files to size 30, the roots were randomly assigned into three experimental groups according to the obturation technique used: (1) single cone, (2) cold lateral compaction, and (3) System B + Obtura. In all groups, the specimens were randomly assigned into four subgroups according to the polymerization method that was used to cure Epiphany sealer from the coronal aspect: (1) quartz-tungsten-halogen (QTH), (2) light-emitting diode (LED), (3) plasma-arc curing (PAC), and (4) chemical cure (uncured). Leakage was measured by the fluid-filtration method at 1 day and 1 week. Statistical analysis was performed by using Kruskal-Wallis and Wilcoxon signed-rank tests at p < 0.001. Fluid conductance of all groups increased significantly within time (p < 0.001). The tested obturation techniques had no significant effect on the leakage values (p = 0.433). The following statistical ranking was obtained for fluid-filtration values: uncured > PAC > LED > QTH (p < 0.001).
authors.affiliation: Department of Endodontics, Hacettepe University, Ankara, Turkey. emrenagas@yahoo.com
authors.forename: Emre
authors.initials: E
authors.lastname: Nagas
authors.forename: M Ozgur
authors.initials: MO
authors.lastname: Uyanik
authors.forename: Cem
authors.initials: C
authors.lastname: Sahin
authors.forename: Veli
authors.initials: V
authors.lastname: Durmaz
authors.forename: Zafer C
authors.initials: ZC
authors.lastname: Cehreli
mesh_terms: D055117:Curing Lights, Dental; D003722:Dental Alloys; D003763:Dental Leakage / Q000145:classification; D004867:Equipment Design; D006801:Humans; D055115:Light-Curing of Dental Adhesives / Q000379:methods*; D008422:Materials Testing; D009532:Nickel; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D013997:Time Factors; D014025:Titanium
chemical_list: D003722:Dental Alloys; D012387:Root Canal Filling Materials; C486893:epiphany sealer; C486892:resilon sealer; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium