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

Table 5

Δ𝐸 values of the groups (mean ± SD).

Groups (𝑛=5)	Without RC (after UV)	With RC (after UV)
	Δ𝐸 values	Δ𝐸 values
C	6.21±0.90^A,a	9.28±0.47^A,b
NF	5.73±1.34^A,a	12.38±0.44^B,b
MH	3.34±0.48^B,a	5.68±0.64^C,b

In each column (among the RM), the same superscript capital letters indicate no significant differences (𝑃>0.05) with respect to their UV or RC procedures (𝑃>0.05).
In each row (for the individual restorative material), 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).