TY - JOUR ID - TI - Effect of Different Surface Treatments on Surface Roughness and Vickers Micro-Hardness of Monolithic Zirconia AU - 1Afrah Radhy Hashim AU - Nidhal Sahib Mansoor PY - 2021 VL - 8 IS - 1 SP - 16 EP - 25 JO - Journal of Oral and Dental Research مجلة طب الفم والاسنان SN - 23106417 AB - Background Zirconia is highly material-dependent so that many surface treatments may positively or negatively affect the surface as well as the mechanical propertiesObjectives The objective of this study was to evaluate the effect of different surface treatments on surface roughness and Vickers micro-hardness number (VHN) of monolithic zirconia (m z). Material and Methods 24 monolithic zirconia discs (10 mm in diameter, and 2 mm in thickness) were created by using (STL) file and then milled, sintered, and flattened on the surface with 600,800,1200 grit aluminum oxide paper. They were then divided into 3 groups (n=8) according to the surface treatment: Glaze (G), polishing kit (PK), and diamond polishing paste (DPP). Surface roughness (Ra) and Vickers hardness (VHN) measuring after the surface treatments were performed.Results The surface treatment seems to significantly affect the roughness and (VHN) of monolithic zirconia. All specimens polished with a polishing kit showed significantly different Ra values than the glazed specimens. The lowest Ra values were observed with the use of a polishing kit, while the largest Ra values were observed in the glazed group. The largest (VHN) was shown in a polishing kit group and the lowest (VHN) value was obtained with the glazing group. The SEM observations demonstrated that the polishing techniques affected the roughness of monolithic zirconia. Conclusions polishing kit can be used as an alternative to glazing for monolithic zirconia. This may help in reducing the number of appointments of the patients and is time-consuming.

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