Effect of pH on the Wettability and Fluoride Release of an Ion-releasing Resin Composite

The effect of pH on the wettability and fluoride release of Ariston pHc was examined. It was determined that this material might interfere with plaque adhesion in the oral environment.

Cytotoxicity of MTA and Portland cement on human ECV 304 endothelial cells

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 was considered statistically significant.

RESULTS

No statistically significant difference was shown between any of the experimental materials (P > 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.