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Representative top-view images of the samples taken by scanning electron microscope (SEM) of the as-received sample and the sample rinsed with Mouthwash 2: (a) Brand A; (b) Brand B; (c) Brand C; and (d) Brand D. Top-row images of each brand were taken at 25× (Scale bar = 1 mm). Bottom-row images of each brand were taken at 2500× (Scale bar = 10 μm).
