Finishing and polishing techniques on the surface roughness of monolithic zirconia after surface adjustment

Objectives:
To compare the surface roughness of glazed and polished monolithic zirconia with the surface roughness produced by different intraoral polishing systems on adjusted monolithic ceramics.
Methods: Milled monolithic zirconia discs (10mm diameter x 2mm thickness) were manufactured and distributed according to the following groups (n=10): BruxZir (glazed and polished), Zenostar (glazed and polished).
Surface roughness, expressed as arithmetic average height (R_a) and root mean square (RMS) roughness values, was measured using Atomic Force Microscope (AFM) and profilometer before and after adjustment and polishing with the following intraoral polishing systems: BruxZir and Dialite ZR (for BruxZir) and Zenostar and Dialite ZR (for Zenostar). Mean and standard error for each material and polishing system were calculated. T-test, one-way ANOVA, and Bonferroni post hoc tests were used to analyze data.
Results:
BruxZir zirconia presented smoother surfaces with Dialite ZR system compared to BruxZir system
Zenostar zirconia shown smoother surfaces with Zenostar system compared to Dialite ZR system
Conclusions:
All materials presented smoother surfaces at baseline than after adjustment and polishing.