Fig. 3
From: Ex vivo comparative study of at home bleaching products on whitening efficacy and enamel integrity
AFM analysis of bleached bovine mandibular teeth. Differences in the developed surface area (Sdr) parameter, calculated from AFM topography images before and after different at-home bleaching treatments. The x-axis (abscissa) labels represent the treatment groups. The bars display the mean ± standard error (n = 10). The symbol ** indicates a highly significant difference (p < 0.001).
