Abstract : The purpose of this study was to evaluate the effect of treatment with Hypochlorous-acid Electrolyzed Water and three kinds of root canal irrigant (NaOCl, EDTA and MTAD) on the bond strength of 4-META/MMA-TBB resin to dentin. Bovine dentin surfaces of maxillary anterior teeth were ground with 600-grit silicon carbide abrasive paper under water coolant for 30 seconds to make them plane-parallel and then were irrigated with various root canal irrigants for 10 minutes.
4-META/MMA-TBB resin was bonded to prepolymerized resin cores accorded to the manufacturers’ instructions. After storage in distilled water at 37°C for 24 h, specimens were stressed at a crosshead speed of 1 mm/min. The interfacial adhesion was observed under SEM of various samples.
In the results of the shear test, the group treated with sodium hypochlorite showed significantly decreased bond strength compared with the control group. On the other hand, the HEW, MTAD and EDTA treated groups showed no significant differences in bond strength value. Observations of the resin—dentin interfaces using SEM showed a morphological difference in HEW and each of their comparison groups. In the NaOCl, MTAD and EDTA groups, crevices between resin and dentin were observed, whereas crevices were not found in the HEW and control groups.
From these results, it is suggested that HEW did not affect the 4-META/MMA-TBB resin bond strength.
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