Effect of Adding Silica Nanoparticles on the Physicochemical Properties, Antimicrobial Action, and the Hardness of Dental Stone Type 4

Table 3

Results of hardness test for the groups (0%, 0.5%, 1%, and 2%).

Samples	Hardness (MPa)
0% silica NPs	55.85 ± 2.20
0.5% silica NPs	62.52 ± 4.83
1% silica NPs	66.42 ± 4.80
2% silica NPs	84.52 ± 8.91
SS	29589
DF	11
MS	2690
F	162.8
-value	0.0057