Comparison of the effect of three different irrigants on the contact angle of an epoxy resin sealer with intraradicular dentin

Abstract

Aim: To evaluate the contact angle between epoxy resin sealer and dentin treated with different irrigant solutions both in the presence and absence of smear layer. Materials and Methods: Seventy human mandibularfirst premolars were used and 140 longitudinal dentin slices were obtained from them. Each sample was irrigated with of 3% sodium hypochlorite (NaOCl), simulating the irrigation used during the chemomechanical preparation and then washed with 10ml of distilled water (DW). The samples were then divided into seven groups of 20 samples each. Group 1:NaOCl + DW, Group 2: QMix + DW, Group 3: 0.1% octenidine hydrochloride + DW, Group 4:Ethylenediaminetetraacetic acid (EDTA) + DW + NaOCl + DW, Group 5: EDTA + DW + QMix + DW, Group 6: EDTA + DW + 0.1% Octenidine Hydrochloride + DW, and Group 7(control): DW. The contact angle between AH Plus and the samples was measured using Rame Hart Goniometer followed by statistical analysis of data. Results: Values of contact angle was least when samples were treated with QMix followed by treatment with 0.1% Octenidine Hydrochloride followed by 3% NaOCl. Removal of smear layer reduced contact angles in all cases except when samples were treated with 3% NaOCl. Results were statistically significant when 3% NaOCl was compared to 0.1% Octenidine Hydrochloride and QMix (P = 0.034). Statistically significant difference was seen before and after removal of smear layer for 3% NaOCl and 0.1% Octenidine Hydrochloride. (P = 0.003). Conclusion: Qmix is the irrigant of choice, but 0.1% octenidine hydrochloride may be recommended as a useful irrigant after further research.