Surface roughness assessment
The data for Ra (in μm) measured with SPA and AFM are shown in Tables Surface roughness (Mean ± SD) of enamel specimens (in μm) determined by 2D-SPA at baseline and post-erosive cycleSuperscript uppercase letters represent differences (Superscript lowercase letters represent differences (Surface roughness (Mean ± SD) of enamel specimens (in μm) determined by AFM at baseline and post-erosive cycleSuperscript uppercase letters represent differences (Superscript lowercase letters represent differences (For chlorpheniramine, the mean Ra measured by SPA (Table Although the Ra determined for paracetamol did not reveal significant differences between baseline and post-erosive cycle for all treatment groups; the Ra determined by AFM, at the post-erosive cycle with chlorpheniramine, when treated with 4 and 8% Arg-NaF was significantly lower than the other groups (