TABLE 3.

Mean and standard deviation of opalescence of different ceramic types with 0.5 and 1 mm thicknesses

Ceramic type	Thickness	Mean	SE	95% confidence interval
				Lower bound	Upper bound
IPS e.max	0.5 mm	3.398	0.158	3.083	3.713
	1.0 mm	1.470	0.158	1.155	1.785
Enamic	0.5 mm	1.443	0.158	1.128	1.758
	1.0 mm	2.004	0.158	1.689	2.319
Feldspathic	0.5 mm	1.062	0.158	0.747	1.377
	1.0 mm	1.121	0.158	0.806	1.436
Zirconia	0.5 mm	1.980	0.158	1.664	2.295
	1.0 mm	3.853	0.158	3.537	4.168