Figure 6

Effect of CSE on cell viability in rat PDL fibroblasts. MTT activity was measured in fetal rat PDL fibroblasts exposed to different concentrations of CSE (5%, 10% or 15%) (v/v) for 60 minutes. Cells not exposed to CSE were considered as controls. Level of absorbance was measured at 540 nm. Each bar represents the mean ± SEM of three experiments of 16 samples in each.