Table 3.

∆E of the groups.

Composite type	Group	∆E (mean ± SD)
X-tra fil	Control	1.37 ± 0.83
	2 h	3.02 ± 0.58
	Immediately	2.86 ± 0.19
Z250	Control	0.36 ± 0.25
	2 h	1.46 ± 0.76
	Immediately	1.18 ± 0.39
Ultimate	Control	0.63 ± 0.54
	2 h	3.64 ± 1.15
	Immediately	1.82 ± 1.64

Note: Five specimens in each group.