Fig. 5.

DNA damage in human gingival fibroblasts exposed to 2-hydroxyethyl methacrylate (HEMA, open symbols) or methacrylic acid (MAA, closed symbols) for 6 h at 37°C. DNA damage was measured as DNA percentage in the tail in comets of neutral version of the comet assay. The mean value for one hundred cells analyzed in each treatment in three independent experiments is displayed, error bars represent SEM, P < 0.001 for 1, 5 and 10 mM concentration of HEMA and MAA as compared with unexposed controls