Figure 3. Time-dependent induction of apoptosis by TEGDMA. Primary human pulp cell cultures were continuously exposed to 1 mmol/L TEGDMA for 6, 12, and 24 hrs. The percentages of the apoptotic cell population in untreated controls () and TEGDMA-treated cultures (•) were analyzed by flow cytometry. Values (means ± SD) from 3 independent experiments in duplicate are presented (n = 3); * indicates a significant (p 0.05) difference from untreated control cultures (Mann-Whitney U-test).