Table 6.

Mean values of color changes of different filling materials after exposure to Coca-Cola

Time-line	Micro-hybrid			Nano-hybrid			Glass-ionomer
	∆L	∆a	∆b	∆L	∆a	∆b	∆L	∆a	∆b
Day 7	− 0.08 ± 1.48	0.34 ± 0.64	− 0.68 ± 0.6	− 0.14 ± 0.33	0.66 ± 0.05	5.78 ± 1.14	− 6.86 ± 3.05	2.2 ± 0.85	2.38 ± 2.58
Day 30	1.92 ± 8.36	2.4 ± 1.07	0.44 ± 1.69	5.66 ± 8.02	1.3 ± 3.22	7.6 ± 1.52	− 0.12 ± 2.13	2.04 ± 0.9	1.3 ± 2.81