Comparative evaluation of push-out bond strength of resin-based sealer and mineral trioxide aggregate-based sealer after using normal saline and 2% chlorhexidine as a final irrigant: In vitro study

Abstract

Aim: The aim of this study was to compare the push-out bond strengths of a resin-based sealer and a mineral trioxide aggregate (MTA)-based sealer after using normal saline and 2% chlorhexidine (CHX) as the final irrigant. Materials and Methods: Fifty percent of the samples were irrigated with 2% CHX, and other 50% samples were irrigated with normal saline as the final irrigant. Each set of twenty samples was then further split into groups based on the sealer used. For Group 1 - AH Plus® (Dentsply, Maillefer, Ballaigues, Switzerland), a resin-based sealer was used after using normal saline as the final irrigant (n = 10). In Group 2 an MTA-based sealer was used after using normal saline as the final irrigant (n = 10). In Group 3, AH Plus® (Dentsply, Maillefer, Ballaigues, Switzerland) was used after using 2% CHX as the final irrigant (n = 10). In Group 4, an MTA-based sealer was used after using 2% CHX as the final irrigant (n = 10). After obturation, all the samples were cut perpendicular to their long axis to obtain slices of 3mm each from the coronal and middle third. The discs were then subjected to assess the push-out bond strength by using the Universal Testing Machine. Results: AH Plus® (Dentsply, Maillefer, Ballaigues, Switzerland) showed a significant higher push-out bond strength as compared to the MTA-based sealer after using both saline and 2% CHX. The highest Push-Out Bond Strength was seen with AH Plus® (Dentsply, Maillefer, Ballaigues, Switzerland) after using 2% CHX. Conclusion: AH Plus® (Dentsply, Maillefer, Ballaigues, Switzerland) after using CHX as the final irrigant has shown the best result among all the groups.