title: Microleakage of Single-Cone Gutta-Percha Obturation Technique in Combination with Different Types of Sealers.
abstract: BACKGROUND
  Various materials and methods have been recommended for successful root canal obturation. The aim of this experimental in vitro study was to compare the sealing ability of three root canal sealers AH-26, glass ionomer cement (GIC) and zinc oxide eugenol (ZOE) in single gutta-percha obturating system.
  
  
  METHODS
  Seventy extracted single-rooted human teeth were decoronated. The teeth were randomly divided into 3 experimental groups (n=20) and 2 positive and negative control groups. After root canal preparation, canals were obturated with single-cone method using either AH-26, GIC and ZOE. The leakage was evaluated using the dye penetration method. The samples were sectioned to evaluate the linear leakage using a stereomicroscope. The data were analyzed using the One-way ANOVA test.
  
  
  RESULTS
  All the specimens in the positive control group showed evidence of leakage. In the experimental groups, the lowest leakage scores were observed in the AH-26 group (P<0.05). However, there were no statistically significant differences between GIC and ZOE samples (P=0.676).
  
  
  CONCLUSIONS
  AH-26 showed a superior seal and less microleakage compared to the two other materials in single gutta-percha obturating system.
authors.affiliation: Persian Gulf Oral and Dental Diseases Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran;
authors.forename: Saeedeh
authors.initials: S
authors.lastname: Sadr
authors.affiliation: Persian Gulf Oral and Dental Diseases Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran;
authors.forename: Ali
authors.initials: A
authors.lastname: Golmoradizadeh
authors.affiliation: Laboratory of Molecular Neuroscience, Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; ; Department of Endodontics, Dental School, Kerman University of Medical Sciences, Kerman, Iran ;
authors.forename: Maryam
authors.initials: M
authors.lastname: Raoof
authors.affiliation: Student of Research Committee, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
authors.forename: Mohammad Javad
authors.initials: MJ
authors.lastname: Tabanfar
keywords: Dye Penetration; Microleakage; Obturation; Root Canal Therapy; Sealer; Single-Cone