title: An in vitro evaluation of the apical sealing ability of new polymeric endodontic filling systems.
abstract: OBJECTIVE
  The objective of this study was to compare the short-term sealing abilities of recently introduced polymeric endodontic filling systems.
  
  
  METHODS
  Root canals of 120 extracted and decoronated human single-rooted teeth were instrumented using crown-down technique with HERO Shaper rotary instruments. The roots were divided randomly into 8 groups (6 experimental and 2 control groups of 15 roots each) and filled with different combinations of core and sealer as follows: group 1, RealSeal/Resilon; group 2, RealSeal/Herofill; group 3, Hybrid Root Seal/Resilon; group 4, Hybrid Root Seal/Herofill; group 5, MM-Seal/Resilon; group 6, MM-Seal/Herofill; group 7, positive controls (Herofill only); group 8, negative controls. Apical leakage quantity was evaluated after 1 week by using a fluid filtration model. For each sample, measurements of fluid movement were recorded at 2-minute intervals for a total of 8 minutes, and then averaged. The data were calculated and analyzed using the Kolmogorov-Smirnov test, 1-way analysis of variance (ANOVA), and the Tukey test. Significance was set at P less than .05.
  
  
  RESULTS
  Multiple paired comparisons (Tukey test) showed that, of all the groups, MM-Seal/Herofill combination exhibited the least microleakage, and RealSeal/Herofill combination ranked second in this regard. The mean leakage values for the RealSeal/Resilon and MM-Seal/Resilon combinations were both significantly higher than the means for the other 4 experimental groups (P < .01). Hybrid Root Seal combined with Resilon resulted in significantly less microleakage than Hybrid Root Seal combined with Herofill (P = .001).
  
  
  CONCLUSIONS
  The results suggest that the sealing properties of epoxy-resin-based sealer (MM-Seal) combined with gutta-percha (Herofill) are superior to those of methacrylate-based sealers (Hybrid Root Seal and Realseal) combined with Resilon.
authors.affiliation: Department of Endodontics, Baskent University, Faculty of Dentistry, Ankara, Turkey. eonay@baskent.edu.tr
authors.forename: Emel Olga
authors.initials: EO
authors.lastname: Onay
authors.forename: Mete
authors.initials: M
authors.lastname: Ungor
authors.forename: Saadet
authors.initials: S
authors.lastname: Unver
authors.forename: Hale
authors.initials: H
authors.lastname: Ari
authors.forename: Sema
authors.initials: S
authors.lastname: Belli
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry / Q000627:therapeutic use*; D003763:Dental Leakage / Q000517:prevention & control*; D004338:Drug Combinations; D004853:Epoxy Resins / Q000737:chemistry / Q000627:therapeutic use*; D006801:Humans; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000627:therapeutic use*; D012389:Root Canal Obturation / Q000379:methods*; D018709:Statistics, Nonparametric
chemical_list: D003188:Composite Resins; D004338:Drug Combinations; D004853:Epoxy Resins; D012387:Root Canal Filling Materials