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Impact of Sandblasting on Morphology, Structure and Conductivity of Zirconia Dental Ceramics Material

Jakovac, Marko; Klaser, Teodoro; Radatović, Borna; Bafti, Arijeta; Skoko, Željko; Pavić, Luka; Žic, Mark (2021) Impact of Sandblasting on Morphology, Structure and Conductivity of Zirconia Dental Ceramics Material. Materials, 14 (11). ISSN 1996-1944

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Over the last decade, zirconia (ZrO2)-based ceramic materials have become more applicable to modern dental medicine due to the sustained development of diverse computer-aided design/computer-aided manufacturing (CAD/CAM) systems. However, before the cementation and clinical application, the freshly prepared zirconia material (e.g., crowns) has to be processed by sandblasting in the dental laboratory. In this work, the impact of the sandblasting on the zirconia is monitored as changes in morphology (i.e., grains and cracks), and the presence of impurities might result in a poor adhesive bonding with cement. The sandblasting is conducted by using Al2O3 powder (25, 50, 110 and 125 µm) under various amounts of air-abrasion pressure (0.1, 0.2, 0.4 and 0.6 MPa). There has been much interest in both the determination of the impact of the sandblasting on the zirconia phase transformations and conductivity. Morphology changes are observed by using Scanning Electron Microscope (SEM), the conductivity is measured by Impedance Spectroscopy (IS), and the phase transformation is observed by using Powder X-Ray Diffraction (PXRD). The results imply that even the application of the lowest amount of air-abrasion pressure and the smallest Al2O3 powder size yields a morphology change, a phase transformation and a material contamination

Item Type: Article
Uncontrolled Keywords: zirconia ; sandblasting ; PXRD ; impedance ; equivalent electrical circuit (EEC) ; conductivity ; dental material
Subjects: BIOMEDICINE AND HEALTHCARE > Dental Medicine
Divisions: Division of Materials Chemistry
Center of Excellence for Advanced Materials and Sensing Devices
Depositing User: Luka Pavić
Date Deposited: 06 Jul 2021 11:36
DOI: 10.3390/ma14112834

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