Conventional vs. Ready-To-Use Bioceramic Cements: In Vitro Bond Strength Performance in Blood-Contaminated Dentine.

This study evaluated the performance of MTA and ready-to-use cement (Bio C Repair) in dentine repair under different blood contamination conditions. 120 bovine root dentine-disks were divided into control and blood-contaminated groups and then subdivided on the basis of cement type and exposure time (immediate or 15-min delay). The control was stored in a humid environment at 37°C for 28 days, whereas the contaminated group was stored in blood. Push-out bond strength was assessed using a universal testing machine (1 mm/min). Three samples per subgroup underwent EDS-X and SEM analysis. MTA exhibited significantly lower bond strength than Bio C Repair (p < 0.001). Samples exposed to blood showed significantly lower bond strength than controls (p < 0.001). The 15-min delay reduced bond strength only in Bio C Repair samples (p = 0.045). It can be concluded that blood contamination reduced bond strength, with the ready-to-use material demonstrating superior performance compared to the conventional bioceramic cement.