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Table 2 Mean values and standard deviation of the baseline (VHN1) and post-pH cycling (VHN2) surface microhardness, and mean values for percentage of surface microhardness loss (%VHN) after treatment and pH cycling

From: Effect of fluoride varnish with added casein phosphopeptide-amorphous calcium phosphate on the acid resistance of the primary enamel

Group VHN1 VHN2 %VHN
No treatment (control) 350.00 ± 38.64A 92.00 ± 24.29B −73.40d
MI Varnish 353.30 ± 30.25A 279.01 ± 27.13B −20.80a
Clinpro White 376.40 ± 36.74A 245.20 ± 28.91B −34.60b
Duraphat 387.20 ± 31.12A 163.00 ± 27.92B −57.80c
  1. Different uppercase letters indicate significant difference between baseline and post- pH cycling surface microhardness values of each varnish (paired-T test, P < 0.05, n = 10 incisors in each group). Different lowercase letters indicate significant differences among in the %VHN between groups (one-way ANOVA and Tukey’s test, P < 0.05, n = 10 incisors in each group)