ABSTRACT
Aim: The purpose of this study was to evaluate the influence of ultrasonic activation at different levels of endodontic therapy on filling quality of various sealers. Materials and Methods: Sixty extracted human single rooted teeth were divided into 4 groups (n=15) based on the sealer used to obturate the root canal instrumented up to F4 pro taper. These groups were subsequently divided into 3 sub-groups (n=5) each depending on the activation protocol followed in the study (i.e., no activation of irrigant /sealer, activation of final irrigant, activation of both irrigant and sealer). All samples were sectioned at 2, 4, 6 mm from apex. The percentage of sealer penetration of root canals were analysed. Results: In the groups where the final irrigant and sealer was ultrasonically agitated showed statistically significant increase in sealer penetration when compared to other groups. I Root SP (D) showed a statistically significant difference in sealer penetration when compared to ZOE, AH plus and HRS. Conclusion: The tubular penetration depth varies with the different physical and chemical properties of the sealers used. The use of ultrasonic activation at different levels of endodontic therapy facilitated better dentinal sealer penetration with I Root SP and AH Plus. I Root SP has solely satisfied and surpassed the test of better sealer penetration even at the apical level.