Evaluation of the Surface Hardness and Roughness of a Resin-Modified Glass Ionomer Cement Containing Bacterial Cellulose Nanocrystals

Table 1

Mean and standard deviation of microhardness and surface roughness of the studied groups.

	Microhardness (VHN)	Roughness (μm)
Test groups (n = 8)	Mean ± SD	Mean ± SD
Control (unmodified RMGIC)	41.60 ± 3.43^a	0.96 ± 0.33^a
0.3% (w/w) BCN-modified RMGIC	36.19 ± 2.38^b	0.59 ± 0.09^b
0.5% (w/w) BCN-modified RMGIC	31.71 ± 4.48^c	0.60 ± 0.13^b
1% (w/w) BCN-modified RMGIC	29.35 ± 2.16^c	0.46 ± 0.13^b

The columns with the same lower-case character are not significantly different from each other .