title: The sealing ability of resilon and gutta-percha in severely curved root canals: an in vitro study.
abstract: OBJECTIVE
  The aim of this study was to compare the apical seal of curved canals obturated with Resilon/Epiphany with gutta-percha/AH Plus.
  
  
  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 significantly less than in group G (P< 0.05). After 30 days, there was no significant difference 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 statistically significant.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Assistant Professor of Endodontics, Dental Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Armita
authors.initials: A
authors.lastname: Rouhani
authors.forename: Jamileh
authors.initials: J
authors.lastname: Ghoddusi
authors.forename: Neda
authors.initials: N
authors.lastname: Naghavi
authors.forename: Zahra
authors.initials: Z
authors.lastname: Ebadzadeh
authors.forename: Majid
authors.initials: M
authors.lastname: Akbari
keywords: Curved canal; Dental leakage; Epiphany sealer; Filtration; Resilon