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  Indian J Med Microbiol
 

Figure 2: Microhardness values of all groups decreased from the initial week of immersion until the end of the 28 days period, and the greatest change in hardness occurred within the first 7 days

Figure 2: Microhardness values of all groups decreased from the initial week of immersion until the end of the 28 days period, and the greatest change in hardness occurred within the first 7 days