Physicochemical Properties and Dentin Bond Strength of a Tricalcium Silicate-Based Retrograde Material

摘要

The aim of this study was to evaluate the physicochemical properties and the apical dentin bond strength of the tricalcium silicate-based Biodentine in comparison to white MTA and zinc oxide eugenol-based cement (ZOE). Setting time and radiopacity were evaluated according to ISO 6876:2012 specification. Final setting time, compressive strength and pH were also assessed. Materiala??s bond strength to the apical root canal dentin was measured by the push-out assay. Data were analyzed by ANOVA and Tukey-Krammer post-hoc test. Biodentine presented the shortest initial (16.2?±1.48 min) and final setting time (35.4?±5.55 min). Radiopacity of Biodentine (2.79?±0.27 mmAl) does not agree with ISO 6876:2012 specifications. On the other hand, Biodentine showed higher compressive strength after 21 days (37.22?±5.27 MPa) and higher dentin bond strength (11.2?±2.16 MPa) in comparison to white MTA (27.68?±3.56 MPa for compressive strength and 2.98?±0.64 MPa for bond strength) (p0.05) compared to ZOE (pH 7). It may be concluded that Biodentine exhibited faster setting, higher long-term compressive strength and bond strength to the apical dentin than MTA and ZOE.