Figure 5.
Scanning electron microscope (SEM) image for the surface of the enamel specimens: (a) SDF 24 h; (b) SDF 2 weeks; (c) SDF + GSH 24 h; (d) SDF + GSH 2 weeks; (e) SDF + KI 24 h; and (f) SDF + KI 2 weeks.
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