Fig. 2

a Cell proliferation in gingival fibroblasts at 24 h, 48 h, and 72 h. The line chart represents the means and standard deviations from three separate experiments. b Cell viability assay in gingival fibroblast at 24 h, 48 h, and 72 h. The line chart represents the means and standard deviations from three separate experiments. The values are expressed in means (± SD). The asterisk symbol indicates a significant difference between groups (p < 0.05)