Fig 1.
Distribution of the mean microhardness values with 95% confidence interval (P<0.05, fl: 5% sodium fluoride (NaF) varnish, bl: 445nm diode laser, erb: Er:YAG laser, fl.bl: 5% NaF + 445nm diode laser, and fl.erb: 5% NaF + Er:YAG laser).
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