Analysis of Physical and Mechanical Properties of Universal Composites under Different Types of Polishing before and after Acid Challenge

Table 9

Mean values (standard deviation) to color change (ΔE), according to the composite resin`s brands after the challenges.

	Estelite	Palfique	Z350
Control	0.756 (0.136) Aa	0.873 (0.335) Aa	3.78 (0.322) Bb
Wear	0.893 (0.283) Aa	0.849 (1.32) Aa	1.33 (1.29) Aa
Biscover	1.41 (0.359) Aa	0.791 (0.318) Aa	1.06 (1.08) Aa
Cosmedent	1.20 (0.451) Aa	1.04 (0.353) Aa	0.834 (0.321) Aa

Note: Means followed by the same capital letter in the column and lowercase in the row do not differ at 5% significance level () by Tukey’s test.