title: Effect of cavity varnish and intermediate restorative material on coronal microleakage in endodontically treated tooth.
abstract: OBJECTIVE
  Evaluation of microleakage in endodontically treated teeth that have been coronally sealed with eugenol and noneugenol containing zinc oxide cement, with and without the use of cavity varnish.
  
  
  METHODS
  The crowns of single rooted teeth were removed at the cementoenamel junction (CEJ) and the root canals were prepared and obturated with gutta-percha points and zinc oxide eugenol (ZOE) sealer using lateral condensation technique. The samples were randomly divided into four groups-group 1, coronal seal was obtained with ZOE cement; in group 2, three coats of cavity varnish followed with coronal seal of ZOE cement; in group 3, Litark a (noneugenol cement) was placed in the prepared cavity as in group 1; and in group 4, cavity varnish and Litark were placed instead of ZOE as in group 2. The specimens were immersed in 2% methylene blue dye and examined under traveling microscope for evidence of dye penetration of the material.
  
  
  METHODS
  In this study, Kruskal-Wallis test, Mann-Whitney U, and Wilcoxon W tests were used.
  
  
  RESULTS
  Kruskal-Wallis test with P=0.000 indicated that a significant difference exists between the four groups. Mann-Whitney U test and Wilcoxon W test showed a significant difference at 0.05 levels as follows: group 1 with group 3 and 4, group 2 with group 3 and 4, and group 3 with group 4. There was no significant difference at 0.05 levels between group 1 and group 2.
  
  
  CONCLUSIONS
  Group 4 showed significant less amount of dye penetration as compared with other groups.
authors.affiliation: Department of Conservative Dentistry and Endodontics, DAV (C) Dental College and Hospital, Yamuna Nagar, India. drvijay_endo@rediffmail.com
authors.forename: S Vijay
authors.initials: SV
authors.lastname: Singh
authors.forename: Vineeta
authors.initials: V
authors.lastname: Nikhil
authors.forename: Suman
authors.initials: S
authors.lastname: Yadav
mesh_terms: D003736:Dental Cavity Lining; D003738:Dental Cements / Q000627:therapeutic use*; D003763:Dental Leakage / Q000517:prevention & control*; D003793:Dental Restoration, Permanent / Q000379:methods; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods*; D018709:Statistics, Nonparametric; D015035:Zinc Oxide-Eugenol Cement / Q000627:therapeutic use
chemical_list: D003738:Dental Cements; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D006171:Gutta-Percha