title: Assessment of a new root canal sealer's apical sealing ability.
abstract: OBJECTIVE
  The aim of this study was to investigate the apical sealing ability of a newly introduced root canal sealer: iRoot SP Root Canal Sealer.
  
  
  METHODS
  Sixty-eight extracted human anterior single-root teeth were used. The coronal part of each tooth was removed and the root canals were prepared with ProTaper files. The specimens were divided into 3 groups of 20 teeth each. Group A specimens were filled with iRoot SP using the continuous wave condensation technique; Group B specimens were obturated with iRoot SP using a single cone technique; Group C specimens were filled with AH plus by means of the continuous wave condensation technique. Evaluation of the apical leakage was performed with a fluid filtration method at 24 hours and 1, 4, and 8 weeks. Scanning electron microscopy (SEM) was used to qualitatively assess what mechanisms might be responsible for leakage of the different groups.
  
  
  RESULTS
  There was no significant difference in fluid leakage among the groups, as well as no time effect on leakage (P > .05). SEM revealed both gap-free regions and gap-containing regions in canals filled with both materials.
  
  
  CONCLUSIONS
  iRoot SP was equivalent to AH Plus sealer in apical sealing ability.
authors.affiliation: Department of Operative Dentistry and Endodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Zhi
authors.initials: Z
authors.lastname: Li
authors.forename: Bin
authors.initials: B
authors.lastname: Peng
mesh_terms: D000704:Analysis of Variance; D003763:Dental Leakage / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D004853:Epoxy Resins / Q000627:therapeutic use*; D006801:Humans; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000379:methods; D018709:Statistics, Nonparametric
chemical_list: D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer