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

Figure 1

The specimen chamber and upper antagonist holder assembly of the chewing simulator. The loading cycle consists of (a) 2.5 mm vertical movement followed by (b) 0.7 mm horizontal movement then(c) an upward vertical movement.