Table 1.

The mean value of color change (∆E) of the studied samples after their immersion in different solutions

Material	Color change (Mean ± SD)
	Distilled water		Coca-Cola		Tea
	Day 7	Day 30	Day 7	Day 30	Day 7	Day 30
Micro-hybrid	3.25 ± 3.37	3.33 ± 1.09	1.42 ± 1.08	7.64 ± 3.59	13.57 ± 2.63	19.94 ± 2.74
Nano-hybrid	3.6 ± 0.53	6.32 ± 4.41	5.83 ± 1.12	12.19 ± 2.39	8.95 ± 1.65	15.7 ± 1.55
Glass-ionomer	4.38 ± 4.6	6.87 ± 5.38	7.7 ± 3.82	4.91 ± 1.48	7.48 ± 1.72	11.99 ± 4.25