Color Matching of Universal Shade Resin-Based Composite with Natural Teeth and Its Stability before and after In-Office Bleaching

Table 3

Color difference in L, a, and b at restoration and after bleaching measurements.

Treatment stage	L	a	b
	Mean ± (SD)
Restoration	82.057 ± (4.768)	0.704 ± (0.568)	23.285 ± (2.879)
Postbleaching	87.330 ± (4.428)	0.864 ± (0.681)	22.392 ± (2.845)	ΔE00
Δ	5.273 ± (0.34)	0.16 ± (0.113)	−0.893 ± (0.034)	3.529
-value	0.000	0.257	0.166

indicates a significant difference between restoration and postbleaching values.