Figure 1: Cell viability of HPFs exposed to 0.1 mM and 0.5 mM HEMA for 15 days. Values of cell viability about 100% were observed in both specimens treated. Samples exposed to 0.1 mM and to 0.5 mM show cell viability respectively of 105% and 89%. The data represent the mean (± S.D.) of triplicate experiments per condition and are expressed as a percentage of the control value. The MTT data were statistically analyzed by one-way ANOVA followed by Dunnet test. (*) statistically significant differences between groups (p< 0.05).