Effect of Repeated Firings and Thickness on Optical Properties of Variable Preshaded and Shaded Novel Translucent Zirconia Blocks

Table 5

Mean values of and multiple comparisons for number of firings, block type, shade type, and sample thicknesses.

Block	Shade type	Thickness	1-3 firings	1-5 firings	3-5 firings
XT	Preshaded	0.5 mm	^Aa	^Bad	^Ca
		1 mm	^Ab	^Bac	^Cb
		1.5 mm	^Ac	^Bb	^Cbc
	Shaded	0.5 mm	^Aa	^Bac	^Ca
		1 mm	^Ab	^Bcd	^Cbc
		1.5 mm	^Ac	^Bb	^Cc
ST	Preshaded	0.5 mm	^Aa	^Ba	^Ba
		1 mm	^Ab	^Ba	^Cb
		1.5 mm	^Ac	^Bb	^Cc
	Shaded	0.5 mm	^Aa	^Bc	^Cd
		1 mm	^Ac	^Bb	^Cc
		1.5 mm	^Ad	^Bd	^Cc
HT	Preshaded	0.5 mm	^Aa	^Ba	^Ba
		1 mm	^Ab	^Bb	^Cb
		1.5 mm	^Ac	^Bc	^Cc
	Shaded	0.5 mm	^Ad	^Bb	^Bd
		1 mm	^Ae	^Bd	^Ae
		1.5 mm	^Af	^Ae	^Ba

Average values with the same letter do not differ significantly from each other. Capital letters indicate significant differences between firing numbers (); lower case letters indicate the differences between shade type and sample thicknesses ().