title: Fluid flow evaluation of coronal microleakage intraorifice barrier materials in endodontically treated teeth.
abstract: OBJECTIVE
  The objective of this study was to compare the coronal microleakage intraorifice barrier materials, called CoroSeal (CS), fissur sealant (FS), flowable composite FC, and policarboksilate cement (PC), by using the computerized fluid filtration method.
  
  
  METHODS
  Fifty freshly extracted, single-canal human maxillary central teeth were used in this study. The teeth were decoronated to a standardized root length of 15 mm. After preparation and irrigation, all the teeth were obturated with gutta-percha and AH-Plus. In all teeth, the coronal 2 mm of root filling was removed and replaced with one of the intraorifice barriers. According to intraorifice barriers, teeth were divided randomly into 4 experimental groups (n = 10) and 2 control groups (n = 5). Group 1: CS; Group 2: FS; Group 3: FC; and Group 4: PC.
  No barrier material was used.
  Roots were completely coated with the nail polish, including the orifice. Leakage was evaluated by using a computerized fluid filtration model. Differences in fluid filtration among groups were subjected to statistical analysis using the Kruskal-Wallis Test and multiple comparisons test.
  
  
  RESULTS
  A value of P < 0.05 was statistically significant. Statistical analysis has indicated that the CS leaked significantly less than other groups (P < 0.05). There was a significant difference between FS and PC (P < 0.05), in contrast there was no significant difference between FS and FC (P > 0.05).
  
  
  CONCLUSIONS
  Using the CS material as an intraorrifice barrier material reduced amount of microleakage as compared with FS, FC, and PC.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Gaziosmanpasa University, Tokat, Turkiye.
authors.forename: H Melike
authors.initials: HM
authors.lastname: Bayram
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Ankara University, Ankara, Turkiye.
authors.forename: Berkan
authors.initials: B
authors.lastname: Çelikten
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Gaziosmanpasa University, Tokat, Turkiye.
authors.forename: Emre
authors.initials: E
authors.lastname: Bayram
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Selcuk University, Konya, Turkiye.
authors.forename: Alperen
authors.initials: A
authors.lastname: Bozkurt
keywords: Barrier materials; CoroSeal; fluid filtration; leakage