Evaluation of the Effect of Different Types of Abrasive Surface Treatment before and after Zirconia Sintering on Its Structural Composition and Bond Strength with Resin Cement

Figure 4

SEM of groups A, B, D, and E. Groups A, B, and D treated before sintering appeared with deep grooves, round elevations, and grain coarsening. Abrasion of group E by silica particle after sintering did not change the surface texture.