Effect of Different Coloring Procedures on the Aging Behavior of Dental Monolithic Zirconia

Table 2

Sample labels for the materials tested in this study.

Coloring procedure	Aging period	Code
Precolored	0 h	PRE-C
	5 h	PRE-5
	10 h	PRE-10
	20 h	PRE-20
Colored by dipping in coloring liquids	0 h	DIP-C
	5 h	DIP-5
	10 h	DIP-10
	20 h	DIP-20