International Journal of Dentistry / 2010 / Article / Fig 6

Research Article

Pop-Cola Acids and Tooth Erosion: An In Vitro, In Vivo, Electron-Microscopic, and Clinical Report

Figure 6

Coca Cola (×700). (a–c) The red arrows show developing erosive effects on smear layer over the surface of enamel; there is enamel erosion and minor abrasion as enamel is dense and hard. (d–f) show developing cracks and crevices over the ECJ surface which become aggravated due to loss of calcium. Also abrasion as loss of material after brushing, with the softened surface reflecting loss of detail going down to deeper more calcified layers, is seen in (f) compared to (e). Red arrow in (g) shows closed dentine tubules which are markedly opened in (h) after exposure to the cola. (i) shows loss of surface material, removed by abrasion, with some tubules (circled) becoming smaller, while others (red arrow) expose deeper levels of the tubes. These results correlate well with the calcium measured in expectorates from swishes with Coca cola in Figure 3.
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