Microstructure,cytocompatibility, and chemical durability of chemically strengthened LAS (Li2O-Al2O3-SiO2) glass-ceramic materials |
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| Affiliation: | 1. School of Science, Xi’an University of Posts and Telecommunications, 710061 Xi’an, China;2. The Institute of Scientific and Industrial Research, Osaka Univeristy, Japan;3. State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, China;1. Institute for Single Crystals NAS of Ukraine, 60 Nauky Ave., Kharkiv 61072, Ukraine;2. SSI “Institute for Single Crystals”, NAS of Ukraine, 60 Nauky Ave., Kharkiv 61072, Ukraine;1. Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026, China;2. Liaoning Engineering Laboratory of Special Optical Functional Crystals, College of Environmental and Chemical Engineering, Dalian University, Dalian 116622, China;3. State Key Laboratory of Light Alloy Casting Technology for High-End Equipment, Shenyang Research Institute of Foundry Co., Ltd, Shenyang 110022, China;4. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China;1. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, PR China;2. National Key Laboratory for Precision Hot Processing of Materials, Harbin Institute of Technology, China;3. Shenzhen STRONG Advanced Materials Research Institute Co., Ltd, PR China;1. Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou 521031, China;2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;3. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;4. School of Science, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | The K+-Na+ ion exchange was used to strengthen LAS glass-ceramic materials prepared by hot-pressing sintering. The microstructure, cytocompatibility, and chemical durability of the chemically strengthened LAS glass-ceramics were characterized. The XRD results showed that the K+-Na+ ion exchange mainly occurred between the glass phase of the LAS glass-ceramics and molten salt baths. The ion-exchange process was mainly responsible for the improved chemical durability of the LAS glass-ceramics. The dissolution in acetic acid was significantly reduced from 72 to 15 μg·cm?2 after the ion-exchange treatment, which was attributed to residual compressive stress and increased contents of Q3 and Q4 structural units in the surface region of the LAS glass-ceramics. In addition, the chemically strengthened LAS glass-ceramic samples exhibited good biocompatibility determined by the CCK-8 process using the L929 cell line, having a promising potential as dental restorative materials. |
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| Keywords: | Ion exchange Lithium disilicate glass-ceramic Microstructures Cytocompatibility Chemical durability |
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