ABSTRACT
The purpose of this study was to determine the sealing ability of three different sealers and to compare the sealing ability of three sealers. Thirty single rooted mandibular first premolar teeth were used. The crowns were removed at the cemento - enamel junction and root canals were prepared to a # 35 K-file. The teeth were randomly divided into three groups, A, K and R. Each group consisted of 10 specimens. In group A, AH Plus sealer, group K, Ketac-endo sealer and group R, Roth 801 sealer were used and obturated with gutta percha using lateral condensation technique. After storage in 100% humidity at 37°C for one week, the root surfaces were coated with nail polish [except at the apex] and suspended in 2% methylene blue dye solution for one week. The roots were sectioned longitudinally to determine the following mean values of dye penetration, group A - 2.675 mm, group K - 2.346 mm, group R - 4.929 mm. This study shows that Ketac-endo gave better seal than Roth 801 sealer