Aim To compare the shear bond strengths of a calcium silicate‐based root canal sealer (CSS), to dentin or calcium silicate‐impregnated gutta‐percha (CSGP), with the shear bond strengths of an epoxy resin‐based sealer. Methods For sealer/dentin testing, 40 hemisectioned roots were divided into 2 groups. Coronal root dentin discs were bonded with CSS or epoxy resin‐based sealer. For sealer/core material testing, CSGP and conventional gutta‐percha discs were bonded with a matching sealer (N = 20 per group). The shear bond strengths were tested using a universal testing machine. The failed modes were analyzed using stereomicroscopy and scanning electron microscopy. Results The CSS sealer had significantly higher shear bond strength to dentin than did epoxy resin‐based sealer (P < .01). However, shear bond strengths of the 2 sealers to core materials did not significantly differ (P = .74). The remnants of the CSS sealer adhering to dentin or calcium silicate gutta‐percha disc were observed. Conclusions The CSS sealer had better adhesion to dentin than did epoxy resin‐based sealer. However, the bond of the CSS sealer to impregnated gutta‐percha was not superior to the epoxy resin‐based sealer bonded to conventional gutta‐percha.
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