EFFECT OF DENTIN SURFACE-TREATMENT ON LEAKAGE OF ROOT FILLINGS WITH AGLASS-IONOMER SEALER

The purpose of this study was to observe the quality of seal of the gl ass ionomer cement, Ketac-Endo, after treatment of the root canal wall , The root canals of 140 extracted human teeth were prepared biomechan ically. The root canals were treated with either EDTA or received an i ntracanal dressing of calcium hydroxide or camphorated paramonochlorph enol. The root canals were filled by the lateral condensation techniqu e with gutta-percha points and the sealer Ketac-Endo, or zinc oxide-eu genol cement or Sealapex. The teeth were placed into a 2% methylene bl ue dye solution inside a flask, which was attached to a vacuum pump. L eakage was measured linearly, Sealapex exhibited significantly less le akage than Ketac-Endo or zinc oxide-eugenol cement (P < 0.01). The use of EDTA and intermediary dressings reduced significantly (P < 0.01) t he leakage observed with the zinc oxide-eugenol sealer and Ketac-Endo.