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Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties

Laser-powder bed fusion (LPBF) is one of the preferred techniques for producing Co-Cr metal structures for dental prosthodontic appliances. However, there is generally insufficient information about material properties related to the production process and parameters. This study was conducted on sam...

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Autores principales: Viderščak, Dalibor, Schauperl, Zdravko, Šolić, Sanja, Ćatić, Amir, Godec, Matjaž, Kocijan, Aleksandra, Paulin, Irena, Donik, Črtomir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658371/
https://www.ncbi.nlm.nih.gov/pubmed/34885499
http://dx.doi.org/10.3390/ma14237350
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author Viderščak, Dalibor
Schauperl, Zdravko
Šolić, Sanja
Ćatić, Amir
Godec, Matjaž
Kocijan, Aleksandra
Paulin, Irena
Donik, Črtomir
author_facet Viderščak, Dalibor
Schauperl, Zdravko
Šolić, Sanja
Ćatić, Amir
Godec, Matjaž
Kocijan, Aleksandra
Paulin, Irena
Donik, Črtomir
author_sort Viderščak, Dalibor
collection PubMed
description Laser-powder bed fusion (LPBF) is one of the preferred techniques for producing Co-Cr metal structures for dental prosthodontic appliances. However, there is generally insufficient information about material properties related to the production process and parameters. This study was conducted on samples produced from three different commercially available Co-Cr dental alloys produced on three different LPBF machines. Identically prepared samples were used for tensile, three-point bending, and toughness tests. Light microscopy (LM), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD) analyses of microstructure were performed after testing. Differences were observed in microstructures, which reflected statistically significant differences in mechanical properties (one-way analysis of variance (ANOVA) and Scheffé post hoc test (α = 0.05)). The material produced on the 3D Systems DMP Dental 100 had 24 times greater elongation ε than the material produced on the Sysma MySint 100 device and the EOS M100 machine. On the other hand, the material produced on the EOS M100 had significantly higher hardness (HV0.2) than the other two produced materials. However, the microstructure of the Sysma specimens with its morphology deviates considerably from the studied group. LPBF-prepared Co-Cr dental alloys demonstrated significant differences in their microstructures and, consequently, mechanical properties.
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spelling pubmed-86583712021-12-10 Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties Viderščak, Dalibor Schauperl, Zdravko Šolić, Sanja Ćatić, Amir Godec, Matjaž Kocijan, Aleksandra Paulin, Irena Donik, Črtomir Materials (Basel) Article Laser-powder bed fusion (LPBF) is one of the preferred techniques for producing Co-Cr metal structures for dental prosthodontic appliances. However, there is generally insufficient information about material properties related to the production process and parameters. This study was conducted on samples produced from three different commercially available Co-Cr dental alloys produced on three different LPBF machines. Identically prepared samples were used for tensile, three-point bending, and toughness tests. Light microscopy (LM), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD) analyses of microstructure were performed after testing. Differences were observed in microstructures, which reflected statistically significant differences in mechanical properties (one-way analysis of variance (ANOVA) and Scheffé post hoc test (α = 0.05)). The material produced on the 3D Systems DMP Dental 100 had 24 times greater elongation ε than the material produced on the Sysma MySint 100 device and the EOS M100 machine. On the other hand, the material produced on the EOS M100 had significantly higher hardness (HV0.2) than the other two produced materials. However, the microstructure of the Sysma specimens with its morphology deviates considerably from the studied group. LPBF-prepared Co-Cr dental alloys demonstrated significant differences in their microstructures and, consequently, mechanical properties. MDPI 2021-11-30 /pmc/articles/PMC8658371/ /pubmed/34885499 http://dx.doi.org/10.3390/ma14237350 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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/).
spellingShingle Article
Viderščak, Dalibor
Schauperl, Zdravko
Šolić, Sanja
Ćatić, Amir
Godec, Matjaž
Kocijan, Aleksandra
Paulin, Irena
Donik, Črtomir
Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties
title Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties
title_full Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties
title_fullStr Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties
title_full_unstemmed Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties
title_short Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties
title_sort additively manufactured commercial co-cr dental alloys: comparison of microstructure and mechanical properties
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658371/
https://www.ncbi.nlm.nih.gov/pubmed/34885499
http://dx.doi.org/10.3390/ma14237350
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