Table 4.

Student’s t-test of translucency for both materials before and after aging.

Material	Translucency				Tvalue	p value
	Before		After
	Mean	SD	Mean	SD
	Monolithic	16.4	0.316	13.35			0.158	19.3	0.0001*
Core	9.38	0.395	7.05	0.261	8.53	0.0001*
T value	31.3		45.9
p value	0.0001*		0.0001*

* significant difference at P value ≤ 0.05.