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  Indian J Med Microbiol
 

Figure 1: A schematic image of the pH-cycle model which was used in this study. Each cycle consisted of 6 h immersion in demineralizing solution and 16 h immersion in remineralizing solution. Before each demineralization and remineralization cycle, different treatments were applied to the enamel surfaces and then specimens were immersed in the black tea solution for 55 min. These cycles were repeated for 14 consecutive days.

Figure 1: A schematic image of the pH-cycle model which was used in this study. Each cycle consisted of 6 h immersion in demineralizing solution and 16 h immersion in remineralizing solution. Before each demineralization and remineralization cycle, different treatments were applied to the enamel surfaces and then specimens were immersed in the black tea solution for 55 min. These cycles were repeated for 14 consecutive days.