title: Coronal microleakage in root canals obturated with lateral compaction, warm vertical compaction and guttaflow system.
abstract: BACKGROUND
  Root canal obturation seals the root canal system to prevent re-entry and/or growth of microorganisms. The provision of an appropriate restoration to coronally seal the access cavity affects the success of endodontic treatment. The purpose of this study was to evaluate the coronal microbial leakage in root canals that were either filled by lateral compaction, GuttaFlow or warm vertical compaction.
  
  
  METHODS
  In this ex vivo study, 80 single-rooted human extracted teeth were randomly divided into three experimental groups (n=20) and two positive and negative control groups (n=10). The teeth in experimental groups were obturated with cold lateral compaction, GuttaFlow system or warm vertical compaction techniques. After sterilization of the whole system with gamma-ray, saliva leakage was tested using a split-chamber model. Specimens were monitored every 24 hours for 30 days. The data were analyzed using log-rank and Kaplan-Meier survival analysis tests.
  
  
  RESULTS
  There were no significant differences in impeding saliva leakage between the three experimental groups (P>0.05).
  
  
  CONCLUSIONS
  Under the conditions of this ex vivo study, it can be concluded that the sealing ability of cold lateral compaction, warm vertical compaction and GuttaFlow system was comparable.
authors.affiliation: Department of Endodontics, Dental School/Dental Research Center, Tehran University of Medical Sciences, and member of Iranian Center for Endodontic Research, Tehran, Iran.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Aminsobhani
authors.forename: Abdollah
authors.initials: A
authors.lastname: Ghorbanzadeh
authors.forename: Behnam
authors.initials: B
authors.lastname: Bolhari
authors.forename: Noushin
authors.initials: N
authors.lastname: Shokouhinejad
authors.forename: Sholeh
authors.initials: S
authors.lastname: Ghabraei
authors.forename: Hadi
authors.initials: H
authors.lastname: Assadian
authors.forename: Marzieh
authors.initials: M
authors.lastname: Aligholi
keywords: Dental Leakage; Gutta-Percha; GuttaFlow; Microleakage; Root Canal Obturation