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

Scientific paper - Original scientific paper

• Author: Marko Jakovac
• Author: Teodoro Klaser
• Author: Borna Radatović
• Author: Arijeta Bafti
• Author: Željko Skoko
• Author: Luka Pavić
• Author: Mark Žic
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): zirconia; sandblasting; PXRD; impedance; equivalent electrical circuit (EEC); conductivity; dental material
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Materials
• Numbering: vol. 14, no. 11, 2834
• e-ISSN: 1996-1944
• DOI: https://doi.org/10.3390/ma14112834
• URN:NBN: urn:nbn:hr:217:190713
• Publication: 2021-05-25
• Document URL: https://www.mdpi.com/1996-1944/14/11/2834
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). Received: 27 March 2021. Accepted: 22 May 2021. Published: 25 May 2021.
• Created on: 2024-09-25 20:53:19