Effect of Finishing and Polishing on Surface Roughness of Cubic Zirconia

Abstract

Aim:The purpose of this invitro study was to evaluate the effect of finishing and polishing on surface roughness of BruxZir Anterior Cubic zirconia before and after hydrothermal aging. Materials and methods:Twenty samples of BruxZir Anterior Cubic zirconia were divided into two groups, group (1): Polished BruxZir Anterior Cubic zirconia (n=10), group (2): Unpolished BruxZir Anterior Cubic zirconia (n=10). All samples were fabricated out of CAD CAM blocks and evaluated for surface roughness before and after hydrothermal aging. Results: Before aging, there was a significant difference in the surface roughness (Ra) of the polished (M=125.28, SD=1.27) and unpolished (M=128.97, SD=2.61) surfaces. Similarly after aging, there was a significant difference in the surface roughness (Ra) of the polished (M=125.89, SD=1.35) and unpolished (M=130.09, SD=2.97) surfaces. Conclusions:Finishing and polishing of cubic zirconia considerably lowered the surface roughness before and after hydrothermal aging.

Surface Roughness and Bacterial Colonization Of Two Types Of Zirconia (Cubic And Gradient) After Accelerated Hydrothermal Aging. (Comparative In-Vitro Study)

“…56 Standardization of aging procedure was done according to standard aging protocol of ISO13356 by autoclaving zirconia samples of both groups at temperature of 134 o C and 2 bar pressure for 5 hours simulating 15 years serviceability. 57 This strategy was in accordance with another studies that mentioned the reliability of using autoclave to simulate oral conditions. 15,38,58 The present study revealed that IPS e.max ZirCAD Prime showed significantly lower mean Ra before accelerated hydrothermal aging than BruxZir.…”