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Figure 5: Electron micrographs of the enamel surface of the permanent premolar teeth. The images were obtained by scanning electron microscopy at ×1000/2 μm resolution. Scanning electron microscopy micrographs are shown for before radiation exposure (a) control and after exposure (b) 20 Gy, (c) 40 Gy, (d) 60 Gy, (e) 80 Gy samples. Sample size (N) for controls = 22, 20 Gy = 4, 40 Gy = 5, 60 Gy = 4, 80 Gy = 4

Figure 5: Electron micrographs of the enamel surface of the permanent premolar teeth. The images were obtained by scanning electron microscopy at ×1000/2 μm resolution. Scanning electron microscopy micrographs are shown for before radiation exposure (a) control and after exposure (b) 20 Gy, (c) 40 Gy, (d) 60 Gy, (e) 80 Gy samples. Sample size (<i>N</i>) for controls = 22, 20 Gy = 4, 40 Gy = 5, 60 Gy = 4, 80 Gy = 4