The Effect of Simulated Chewing on the Surface Roughness of Direct and Indirect Resin-Composites Opposed by Zirconia: An In Vitro Study

Table 4

The percentage increase of roughness after chewing simulation for both resin-composites (Tetric EvoCeram, Sinfony).

Surface roughness parameters	% Increase of roughness		value
	Tetric EvoCeram	Sinfony
	34.06	11.64	0.140
	36.14	6.45	0.205
	17.35	21.64	0.840
	42.23	-1.90	0.006

Significance set at .