title: Assessment of coronal microleakage in intermediately restored endodontic access cavities.
abstract: OBJECTIVE
  The purpose of this in vitro study was to evaluate the coronal microleakage in endodontic access cavities restored with Kalzinol (zinc oxide eugenol, De Trey, Dentsply Dental Products of India Ltd) and a zinc oxide eugenol (ZOE) intermediate restorative material at different intervals.
  
  
  METHODS
  Restored access cavities were immersed in 2% freshly prepared methylene blue dye, and dye penetration was evaluated at 1-, 2-, 4-, and 7-day intervals.
  
  
  RESULTS
  ZOE cement displayed dye penetration throughout the complete depth of the restoration, reaching the pulp chamber by the second day, whereas Kalzinol produced leakage reaching the pulp chamber on the fourth day.
  
  
  CONCLUSIONS
  Results indicated that none of the ZOE formulations tested could predictably produce a fluid-tight seal even up to the fourth day. We therefore recommend early replacement of these restorations during and after endodontic treatment to produce a better prognosis.
authors.affiliation: Department of Operative Dentistry and Endodontics, Government Dental College, Rohtak, Haryana, India. tewarisanjayrohtak@yahoo.co.in
authors.forename: Sanjay
authors.initials: S
authors.lastname: Tewari
authors.forename: Shikha
authors.initials: S
authors.lastname: Tewari
mesh_terms: D004396:Coloring Agents; D003763:Dental Leakage / Q000175:diagnosis / Q000517:prevention & control*; D004338:Drug Combinations; D005054:Eugenol; D005557:Formaldehyde; D006801:Humans; D008751:Methylene Blue; D008768:Methylmethacrylates; D008963:Molar; D011897:Random Allocation; D012387:Root Canal Filling Materials; D018709:Statistics, Nonparametric; D015034:Zinc Oxide; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D004396:Coloring Agents; D004338:Drug Combinations; D008768:Methylmethacrylates; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D005557:Formaldehyde; D005054:Eugenol; C031667:IRM cement; C003799:N2 Dental Cement; D015034:Zinc Oxide; D008751:Methylene Blue