Figure 4. Microscopic images at 5× magnification of adhesive materials under reflectance illumination mode. In Corega cream (upper) we see the sodium-calcium poly(methyl-vinyl-ether/maleic anhydride) mixed salt in cellulose gum with lots of voids. In Olivafix cream (middle) we see the calcium/sodium poly(vinyl-methyl-methacrylate) copolymer in cellulose gum and in Fittydent cream (lower) agglomerations of silica particle in polyvilylacetate and sodium carboxymethylcellulose.
