. 2020 Sep 16;56(9):476. doi: 10.3390/medicina56090476

Table 3.

Surface roughness (nm) values of resin composites in different subgroups.

Surface Treatment	Resin Composites
	Conventional			Bulk-Fill (G4)
	Micro-Hybrid (G1)	Nano-Filled (G2)	Flowable (G3)	Bulk-Fill (G4)
Non-Treatment (SG1)	17.34 ± 2.90 ^A,1	14.64 ± 3.15 ^A,1	8.32 ± 1.26 ^A,1	10.18 ± 2.69 ^A,1
Bleaching (SG2)	18.68 ± 1.47 ^A,1	19.81 ± 2.18 ^A,1	45.36 ± 6.86 ^B,2	21.50 ± 2.68 ^A,1
Fluoride (SG3)	39.90 ± 4.36 ^A,2	58.20 ± 10.55 ^B,2	76.94 ± 4.97 ^C,3	63.24 ± 7.44 ^B,2

Different superscript numbers in each column (group) indicate significant differences between subgroups (Tukey’s, p < 0.05). Different superscript letters in each row (subgroup) indicate significant differences between groups (Tukey’s, p < 0.05).