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

Table 2

Color difference in L, a, and b at tooth structure and restoration measurements.

Treatment stage	L	a	b
	Mean ± (SD)
Prerestoration	73.685 ± (9.059)	2.761 ± (1.590)	35.464 ± (4.279)
Restoration	82.057 ± (4.768)	0.704 ± (0.568)	23.285 ± (2.879)	ΔE00
Δ	8.372 ± (4.291)	−2.057 ± (1.022)	−12.179 ± (1.4)	6.474
-value	0.000	0.000	0.000

indicates a significant difference between tooth structure and restoration values.