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AIM: To evaluate the cytotoxic effects of two brands of mineral trioxide aggregate (MTA) (Pro-Root MTA and MTA Angelus) and Portland cement (PC) on the human ECV 304 endothelial cell line. METHODOLOGY: Endothelial ECV 304 cells were incubated at 37 degrees C in an atmosphere of 95% air, 5% carbon dioxide and 100% humidity for 7 days and grown in F12 medium supplemented with 10% fetal bovine serum with 50 microg mL(-1) of gentamicin sulphate. Effects of the materials on mitochondrial functions were measured by a colorimetric assay. At each experimental time interval (24, 48 and 72 h), a dimethyl-thiazol-diphenyl tetrazolium bromid assay was conducted to measure cell viability. All assays were repeated three times to ensure reproducibility. Results were expressed as average absorbance (A(570/nm)) +/- SD and the data were analysed statistically by one-way analysis of variance and the Bonferroni post-test. A P-value 0.05). CONCLUSIONS: The two brands of MTA analysed, as well as the PC, initially showed a similar elevated cytotoxic effect that decreased gradually with time allowing the cell culture to become reestablished.
Deus et al. (Tue,) studied this question.