APICAL SEAL OF ROOTS OBTURATED WITH LATERALLY CONDENSED GUTTA-PERCHA,EPOXY-RESIN CEMENT, AND DENTIN BONDING AGENT

The apical seal of roots obturated with either of two kinds of dentin bonding agent, gutta-percha and epoxy-resin-based root canal sealer, w as compared by a die leakage test with that of an epoxy resin root can al sealer and gutta-percha without a bonding agent, Thirty-two roots w ere prepared chemomechanically and divided into three experimental gro ups, Group 1 was filled with gutta-percha, epoxy-resin sealer, and All -Bond 2 Adhesive, Group 2 was filled with gutta-percha, epoxy-resin se aler, and Scotchbond Multi-Purpose Plus adhesive, Group 3 was filled w ith gutta-percha and epoxy resin sealer, The teeth were immersed in 2% methylene blue solution, Groups 1 and 2 leaked significantly less tha n group 3, The materials most frequently observed at the apex were in group 1 dental adhesive and in group 2 gutta-percha, The interface bet ween dentin and the adhesive materials in groups 1 and 2 was examined by scanning electron microscope and showed a hybrid-like layer.