Abstract
The aim of this study was to investigate the bond strength between indirect resin core-buildup and dentin treated with or without hypochlorite (NaOCl) gel. The post-space was made in five extracted human molars with obturated root canals, and the indirect resin core was produced on a gypsum model. Then, the dentin surface was treated with/without NaOCl, followed by luting of the resin core into the cavity. After storage for 24 h in 37 degrees C water, the specimens were sectioned for measuring bond strength to the root and coronal dentin, and were subjected to micro-tensile bond strength (MTBS) testing. Two-way ANOVA showed that significant differences in MTBS were revealed for both factors of NaOCl treatment and dentin region. It is concluded that, for indirect resin core-buildup, the proper use of the NaOCl gel to dentin could increase the bond strength.
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