Effect of chlorine-based irrigants on push out bond strength of resin sealer to radicular dentin-an in vitro study

Original Research

Abstract

Introduction

Sodium hypochlorite (NaOCl) due to its excellent antimicrobial action and tissue dissolving property is the most used irrigant. However, it is toxic if it is extruded beyond apex into the periapical tissues, alters the biomechanical property of dentin of the root canal wall, interferes with the resin sealer polymerization and hence compromises the bond strength. Recently, there has been increased research in search of an alternative irrigant, Calcium hypochlorite.

Aim

To evaluate and compare 3% and 5 %Calcium hypochlorite with 3% sodium hypochlorite root canal irrigants along with sealer to determine push out strength.

Materials and Methods

Thirty teeth having single root were decoronated and randomly allocated into three groups: Group A - 3% NaOCl, Group B - 5% Ca(OCl)2, Group C - 3% Ca(OCl). All the samples were obturated with F3 GP, AH Plus sealer and cut 1mm thick slices and tested in universal testing machine.

Results

 Group B>Group C>Group A, with study 5% Ca(OCl)2 has significantly better bond strength compared to 3% Ca(OCl)2 and 3% NaOCl.

Conclusion

Ca(OCl)2 is a promising irrigant with good antimicrobial efficacy against E.Faecalis, acceptable cytocompatibility and does not negatively alter the dentin mechanical properties and also exhibit superior bond strength values as compared to NaOCl.