[Table/Fig-2]:

Comparison between group of post-treatment surface microhardness values and %SMHR (p<0.05).

Groups	NaF varnish	n-HAP serum	Nano Silver Fluoride (NSF)	Control
NaF varnish	-	NS	p<0.05	p<0.001
n-HAP serum	NS	-	p<0.001	p<0.001
Nano Silver Fluoride (NSF)	p<0.05	p<0.001	-	p<0.001
Control	p<0.001	p<0.001	p<0.001	-

NS presents non-significant difference between groups.

(Post-Hoc Tukey test p<0.05).