Abstract
Background and objective: Apical seal is an important factor in successful root canal therapy and it can be achieved by gutta-percha and a root canal sealer. The purpose of this study was to compare the effect of Tubli-seal, AH26 and Zinc oxide and eugenol as root canal sealers on apical seal.
Materials and Methods: A total of 110 one-rooted extracted human central incisors were instrumented with step-back technique. No 35 K-file was selected as master apical file and flaring was done up to ≠ 60. The teeth were randomly divided into three experimental and two control groups. The root canals of each group were obturated using gutta percha and one of Zinc oxide and eugenol, Tubli-seal, and AH26 sealers. In the positive control group no sealer was used for root canal obturation. Dye penetration technique was used for evaluating the rate of longitudinal microleakage. Dye penetration was measured by a milimetric ruler under stereomicroscope, and LSD test was used for statistical analysis.
Results: The results showed that there was no significant difference in apical microleakage between Tubli-seal and Zinc oxide and eugenol sealers (P=0.63). However, there were significant differences among AH26 and two other sealers, and among positive control group and experimental groups (P<0.01).
Conclusion: According to the results of this study, it seems that Zinc oxide eugenol sealer is not a good sealer for successful root canal treatment.