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

Table 1

Descriptive statistics of L, a, and b at prerestoration, after restoration, postbleaching, and 2 weeks postbleaching.

Experiment stage	L	a	b
	Mean ± (SD)
Prerestoration	73.685 ± (9.059)	2.761 ± (1.590)	35.464 ± (4.279)
After restoration	82.057 ± (4.768)	0.704 ± (0.568)	23.285 ± (2.879)
Postbleaching	87.330 ± (4.428)	0.864 ± (.681)	22.392 ± (2.845)
2 weeks postbleaching	81.954 ± (6.060)	0.902 ± (.603)	20.795 ± (3.286)