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AIM: To evaluate the cytotoxicity and mineralization effects of iRoot BP in human dental pulp cells (hDPCs) and to compare them with those of white mineral trioxide aggregate (WMTA). METHODOLOGY: hDPCs were exposed to prepared dilutions (1 : 1-1 : 10) of the test materials. Cell viability was evaluated using the XTT assay after incubation periods of 24, 48 or 72 h. The expression of mineralization-related genes (bone morphogenic protein, osteonectin, bone sialoprotein, osteopontin, dentine sialophosphoprotein and collagen type 1) and heme oxygenase 1 was measured by quantitative real-time polymerase chain reaction (qRT-PCR) at 24 and 72 h. Statistical differences between test materials were analysed with the Mann-Whitney test. RESULTS: The 1 : 1 and 1 : 2 dilutions of iRoot BP were associated with higher cell viability after 24 h (P 0.05). Although somewhat variable, according to the gene expression results, iRoot BP had a mineralization potential similar to that of WMTA. WMTA revealed a higher heme oxygenase 1 (HO-1) mRNA level than iRoot BP (P < 0.001). CONCLUSIONS: iRoot BP and WMTA were biocompatible and facilitated odontoblastic differentiation of hDPCs.
Torun et al. (Tue,) studied this question.