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Wear Resistance and Biocompatibility of Co-Cr Dental Alloys Fabricated with CAST and SLM Techniques

Cobalt–chromium (Co-Cr) alloys have been widely used as dental-restoration materials for many years. This study sought to investigate whether selective laser melting (SLM) is a more appropriate process than traditional casting (CAST) for fabricating dental Co-Cr alloys. Metallurgical microscopy, X-r...

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Autores principales: Fu, Wenqi, Liu, Shuang, Jiao, Jun, Xie, Zhiwen, Huang, Xinfang, Lu, Yun, Liu, Huiying, Hu, Shuhai, Zuo, Enjun, Kou, Ni, Ma, Guowu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9104588/
https://www.ncbi.nlm.nih.gov/pubmed/35591597
http://dx.doi.org/10.3390/ma15093263
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author Fu, Wenqi
Liu, Shuang
Jiao, Jun
Xie, Zhiwen
Huang, Xinfang
Lu, Yun
Liu, Huiying
Hu, Shuhai
Zuo, Enjun
Kou, Ni
Ma, Guowu
author_facet Fu, Wenqi
Liu, Shuang
Jiao, Jun
Xie, Zhiwen
Huang, Xinfang
Lu, Yun
Liu, Huiying
Hu, Shuhai
Zuo, Enjun
Kou, Ni
Ma, Guowu
author_sort Fu, Wenqi
collection PubMed
description Cobalt–chromium (Co-Cr) alloys have been widely used as dental-restoration materials for many years. This study sought to investigate whether selective laser melting (SLM) is a more appropriate process than traditional casting (CAST) for fabricating dental Co-Cr alloys. Metallurgical microscopy, X-ray photoelectron spectroscopy (XPS), Vickers hardness and nanoindentation tests, and friction and wear tests were used to evaluate the microstructure, surface compositions, mechanical properties, and wear resistance, respectively. Additionally, the biocompatibilities and cell adhesion of the alloys were evaluated with L-929 fibroblasts via CCK-8 assay, Live/Dead staining, flow cytometric analysis, scanning electron microscopy (SEM) observation and real-time PCR (RT-PCR) assay. The XPS results showed that the two alloys were all mainly comprised of Co, Cr, and O. The hardness in the CAST group equaled 7.15 ± 0.48 GPa, while in the SLM group, it equaled 9.06 ± 0.49 GPa. The friction coefficient of SLM alloys remained at approximately 0.46, but the CAST specimens fluctuated significantly. SLM alloys exhibited shallower wear scars and less wear debris compared with CAST alloys, simultaneously. Additionally, there were higher survival and expression of cell-adhesion-related genes on SLM alloys of L-929 cells, which meant that the deleterious effect on L-929 cells was significantly reduced compared with that for the CAST alloys. Overall, the wear resistances and biocompatibilities of the Co-Cr dental alloys were dramatically affected by the fabrication technique. The SLM technique is advantageous over the CAST technique for fabricating Co-Cr dental alloys.
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spelling pubmed-91045882022-05-14 Wear Resistance and Biocompatibility of Co-Cr Dental Alloys Fabricated with CAST and SLM Techniques Fu, Wenqi Liu, Shuang Jiao, Jun Xie, Zhiwen Huang, Xinfang Lu, Yun Liu, Huiying Hu, Shuhai Zuo, Enjun Kou, Ni Ma, Guowu Materials (Basel) Article Cobalt–chromium (Co-Cr) alloys have been widely used as dental-restoration materials for many years. This study sought to investigate whether selective laser melting (SLM) is a more appropriate process than traditional casting (CAST) for fabricating dental Co-Cr alloys. Metallurgical microscopy, X-ray photoelectron spectroscopy (XPS), Vickers hardness and nanoindentation tests, and friction and wear tests were used to evaluate the microstructure, surface compositions, mechanical properties, and wear resistance, respectively. Additionally, the biocompatibilities and cell adhesion of the alloys were evaluated with L-929 fibroblasts via CCK-8 assay, Live/Dead staining, flow cytometric analysis, scanning electron microscopy (SEM) observation and real-time PCR (RT-PCR) assay. The XPS results showed that the two alloys were all mainly comprised of Co, Cr, and O. The hardness in the CAST group equaled 7.15 ± 0.48 GPa, while in the SLM group, it equaled 9.06 ± 0.49 GPa. The friction coefficient of SLM alloys remained at approximately 0.46, but the CAST specimens fluctuated significantly. SLM alloys exhibited shallower wear scars and less wear debris compared with CAST alloys, simultaneously. Additionally, there were higher survival and expression of cell-adhesion-related genes on SLM alloys of L-929 cells, which meant that the deleterious effect on L-929 cells was significantly reduced compared with that for the CAST alloys. Overall, the wear resistances and biocompatibilities of the Co-Cr dental alloys were dramatically affected by the fabrication technique. The SLM technique is advantageous over the CAST technique for fabricating Co-Cr dental alloys. MDPI 2022-05-02 /pmc/articles/PMC9104588/ /pubmed/35591597 http://dx.doi.org/10.3390/ma15093263 Text en © 2022 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
Fu, Wenqi
Liu, Shuang
Jiao, Jun
Xie, Zhiwen
Huang, Xinfang
Lu, Yun
Liu, Huiying
Hu, Shuhai
Zuo, Enjun
Kou, Ni
Ma, Guowu
Wear Resistance and Biocompatibility of Co-Cr Dental Alloys Fabricated with CAST and SLM Techniques
title Wear Resistance and Biocompatibility of Co-Cr Dental Alloys Fabricated with CAST and SLM Techniques
title_full Wear Resistance and Biocompatibility of Co-Cr Dental Alloys Fabricated with CAST and SLM Techniques
title_fullStr Wear Resistance and Biocompatibility of Co-Cr Dental Alloys Fabricated with CAST and SLM Techniques
title_full_unstemmed Wear Resistance and Biocompatibility of Co-Cr Dental Alloys Fabricated with CAST and SLM Techniques
title_short Wear Resistance and Biocompatibility of Co-Cr Dental Alloys Fabricated with CAST and SLM Techniques
title_sort wear resistance and biocompatibility of co-cr dental alloys fabricated with cast and slm techniques
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9104588/
https://www.ncbi.nlm.nih.gov/pubmed/35591597
http://dx.doi.org/10.3390/ma15093263
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