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 Indian J Med Microbiol  
 

Figure 5: Electron micrographs of the enamel surface darkened in the laboratory and treated with dentifrice containing the abrasive agent sodium bicarbonate. Magnitude: ×1000

Figure 5: Electron micrographs of the enamel surface darkened in the laboratory and treated with dentifrice containing the abrasive agent sodium bicarbonate. Magnitude: ×1000