EVALUATION OF THE EFFECT OF DIFFERENT SEALER REMOVAL PROTOCOLS ON THE BOND STRENGTH OF ADSEAL SEALER CONTAMINATED DENTINE TO COMPOSITE- AN IN-VITRO STUDY

Abstract

Background: In endodontic therapy, bacterial leakage is the other most common reason for the failure of the treatment due to contamination of root canal system This study assessed the effect of different sealer removal techniques on the bond strength of dentine to composite resin. Materials and Methods: Twenty extracted teeth were collected and sectioned. Cut dentine surfaces are contaminated with Adseal sealer, followed by grouping of specimens into five groups based on different sealer removal protocol. Group I: contaminated with Adseal seal. Group II: sealer contamination and its removal with dry cotton pellet, Group III: sealer contamination and its removal with cotton pellet saturated 95% ethanol, Group IV: sealer contamination and its removal by surface preparation using high speed fine diamond bur, Group V: uncontaminated dentin. Removal procedure was carried out until the dentine surface are visibly clean which were then followed by bonding of composite resin on to the dentine surface and samples were loaded under universal testing machine for evaluation of tensile bond strength. Values were subjected to statistical analysis. Results: This study revealed that there was no statistically significant difference among the different sealer removal protocols on bond strength. But there was a statistically significant difference among the groups of uncontaminated and contaminated surface. Conclusion: From the present study, it can be concluded that as long as the sealer contaminated dentine surface was visibly cleaned and the use of etch and rinse over the self-etch technique does not appear to interfere with bond strength between dentine and composite.