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  Indian J Med Microbiol
 

Table 4: Comparison between means of Knoop micro hardness of exposed and unexposed surfaces in each group (n = 15) (paired t-test)

Table 4: Comparison between means of Knoop micro hardness of exposed and unexposed surfaces in each group (<i>n</i> = 15) (paired <i>t</i><i>-</i>test)