Impact of Bleaching before or after Veneer Preparation on Color Masking Ability of Laminate Veneers: An In Vitro Study

Table 1

Mean (SD) of color change () and color coordinates (, , and ).

Group
0.5 mm	NB	3.98 (1.6)^a	-2.44 (0.5)^a	-16.6 (2.9)^a	17.38 (2.6)^a
	BBP	9.19 (3.02)^b	-2.72 (1.1)^a	-14.3 (5.0)^a	17.85 (3.5)^a
	BAP	8.39 (4.7)^a,b	-3.2 (1.5)^a	-16.6 (5.5)^a	19.9 (3.6)^a,b
1.0 mm	NB	4.68 (3.3)^a,c	-3.5 (1.1)^a	-18.2 (4.5)^a	19.6 (3.8)^a,b
	BBP	8.57 (4.1)^c,b	-2.87 (0.8)^a	-17.6 (1.8)^a	20.13 (2.4)^a,b
	BAP	13.2 (2.4)^d,b	-3.6 (0.9)^a	-18.2 (3.3)^a	22.99 (2.9)^b

; ; ; . ^a–dIdentical letters indicate no significant differences (, Tukey’s test).