Characterization of alloys produced with new system for processing dental prosthesis

Abstract

Event Abstract Back to Event Characterization of alloys produced with new system for processing dental prosthesis Omar Alageel1, Mohamed-Nur Abdallah1, Eric Caron2 and Faleh Tamimi1 1 McGill University, Faculty of Dentistry, Canada 2 3DRPD, Canada Removable partial dentures (RPD) are traditionally made of casted alloys using the lost-wax technique. Laser-sintering is a new additive manufacturing technique for processing RPD metal frameworks that can produce RPDs frameworks quickly with high precision and at low cost. The objective of this study was to characterize the mechanical, crystallographic, and biocompatibility properties of RPD Cobalt-Chromium (Co-Cr) alloy processed by laser-sintering technique and compare them to those of conventional casted Co-Cr alloy. Methods: Co–Cr samples were fabricated by either conventional casted (CC) or laser-sintering (LS) technique. The mechanical and physical properties of the alloys (i.e. strength, elastic modulus, fatigue behaviour, microhardness, crystallography, and porosity) were evaluated using three-point bending test, Vickers hardness measurements, X-ray diffraction (XRD), Pycnometry, micro–computed tomography (micro-CT), and Scanning Electron Microscopy (SEM). The releases of toxic metal ions from Co-Cr alloys was measured using inductively coupled plasma atomic emission spectroscopy (ICP-AES). The alloys biocompatibility was assessed by Alamar Blue viability assay and cytotoxicity lactate-dehydrogenase (LDH) assay on human epithelial cells. Results: LS alloy showed higher rigidity, porosity, and fatigue resistance compared to CC alloy (p<0.05). Both materials had similar flexural strength, micro-hardness, and biocompatibility (p>0.05). Conclusion: Both laser-sintered and conventional casted Co-Cr alloys are biocompatible; however, laser-sintered Co-Cr alloys are more precise and present better fatigue resistance than casted alloys. Accordingly, it could be anticipated that laser-sintered RPD could presents clinical benefits over casted ones in term of fitting and mechanical stability. Keywords: in vitro, clinical application, Cell response Conference: 10th World Biomaterials Congress, Montréal, Canada, 17 May - 22 May, 2016. Presentation Type: Poster Topic: Mechanical properties of biomaterials Citation: Alageel O, Abdallah M, Caron E and Tamimi F (2016). Characterization of alloys produced with new system for processing dental prosthesis. Front. Bioeng. Biotechnol. Conference Abstract: 10th World Biomaterials Congress. doi: 10.3389/conf.FBIOE.2016.01.02150 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 27 Mar 2016; Published Online: 30 Mar 2016. Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Omar Alageel Mohamed-Nur Abdallah Eric Caron Faleh Tamimi Google Omar Alageel Mohamed-Nur Abdallah Eric Caron Faleh Tamimi Google Scholar Omar Alageel Mohamed-Nur Abdallah Eric Caron Faleh Tamimi PubMed Omar Alageel Mohamed-Nur Abdallah Eric Caron Faleh Tamimi Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.