Effects of Protective Resin Coating on the Surface Roughness and Color Stability of Resin-Based Restorative Materials

Table 3

Surface roughness (Ra) values of the groups (mean ± SD).

Groups (𝑛=5)	Without RC		With RC
	Before UV	After UV	Before UV	After UV
C	0.19±0.07^A,a,1	0.29±0.03^A,b,2	0.17±0.02^A,a,1	0.37±0.09^A,b,3
NF	0.19±0.06^A,a,1	0.30±0.05^A,b,2	0.18±0.03^A,a,1	0.46±0.03^A,b,3
MH	0.07±0.02^B,a,1	0.41±0.07^B,b,2	0.19±0.08^A,a,1	1.06±0.09^B,b,3

In each column (among the RM), the same superscript capital letters indicate no significant differences with respect to their UV or RC procedures (𝑃>0.05).
In each row (for the individual RM), the same lowercase superscript letters indicate no significant differences (𝑃>0.05), but different letters indicate significant differences before and after UV for the individual RC procedure (𝑃<0.05).
In each row (for individual conditions of the UV procedure; before or after), the same numbers indicate no significant differences (𝑃>0.05), but different numbers indicate significant differences without and with the RC procedure (𝑃<0.05).