Journal of AdvancedMedical and Dental Sciences Research

Background: Approximately 60% of endodontic failures are due to insufficient obturation of the root canal system. The present study was conducted to compare the percentage of voids in root canal obturation using different techniques of sealer placement. Materials & Methods: 60 mandibular second premolars were prepared using the step-back technique. The teeth were assigned to two groups of 30 each. In group I, use of K file and in group II, Lentulo spiral sealer placement technique was used. After sealer application and canal obturation with lateral condensation technique, specimens were horizontally cut into 3 mm slices. Sections were evaluated under a digital microscope at 150X magnification for void detection in apical, middle and coronal thirds. Results: Percentage of voids in group I and group II at apical sections were 2% and 1%, at middle sections were 2% and 1% and at coronal sections were 1% and 0% respectively. The difference was significant (P< 0.05). Conclusion: Percentage of voids was max maximally seen with K file technique ofsealerplacement.