Translucency and Strength of Lithium Disilicate for Computer-Aided Design and Manufacturing at Different Thermal Temperatures and Thicknesses: An In Vitro Study
To manufacture dental restorations composed of lithium disilicate (LD) through the computer-aided design and manufacturing (CAD/CAM) process, thermal refinement is an essential process that can affect the optical and mechanical properties of ceramics. In this study, we aimed to evaluate the transluc...
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MDPI AG
2024-01-01
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| Online Access: | https://www.mdpi.com/1996-1944/17/2/396 |
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| author | Chong-Yang Li Kyung-So Jeong Jae-Seob Shin Ji-Suk Shim Jae-Jun Ryu |
| author_facet | Chong-Yang Li Kyung-So Jeong Jae-Seob Shin Ji-Suk Shim Jae-Jun Ryu |
| author_sort | Chong-Yang Li |
| collection | DOAJ |
| description | To manufacture dental restorations composed of lithium disilicate (LD) through the computer-aided design and manufacturing (CAD/CAM) process, thermal refinement is an essential process that can affect the optical and mechanical properties of ceramics. In this study, we aimed to evaluate the translucency and flexural strength of lithium disilicate glass–ceramic for CAD/CAM using different thermal refinement schedules and thicknesses by measuring the total transmission of light through the specimen and calculating the peak load of the specimen until fracture in a piston-on-three-ball test, respectively. The results showed that a lower translucency was exhibited in thicker specimens, and the flexural strength decreased in the order of 1.0, 0.5, and 2.0 mm (<i>p</i> < 0.05). The lithium disilicates thermally refined at a heat of 820 degrees were shown to have the highest biaxial flexural strength (<i>p</i> < 0.05). These findings suggest that it is possible to adjust transparency and strength according to the clinical situation by choosing an appropriate thickness and thermal refinement process. |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-08T10:42:29Z |
| publishDate | 2024-01-01 |
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| spelling | doaj.art-a88f8a585b924da4a81a7dcee34844b32024-01-26T17:27:08ZengMDPI AGMaterials1996-19442024-01-0117239610.3390/ma17020396Translucency and Strength of Lithium Disilicate for Computer-Aided Design and Manufacturing at Different Thermal Temperatures and Thicknesses: An In Vitro StudyChong-Yang Li0Kyung-So Jeong1Jae-Seob Shin2Ji-Suk Shim3Jae-Jun Ryu4Department of Medicine, Korea University Graduate School, Seoul 08308, Republic of KoreaDepartment of Medicine, Korea University Graduate School, Seoul 08308, Republic of KoreaDepartment of Medicine, Korea University Graduate School, Seoul 08308, Republic of KoreaDepartment of Prosthodontics, Korea University Guro Hospital, Seoul 08308, Republic of KoreaDepartment of Prosthodontics, Korea University Anam Hospital, Seoul 02841, Republic of KoreaTo manufacture dental restorations composed of lithium disilicate (LD) through the computer-aided design and manufacturing (CAD/CAM) process, thermal refinement is an essential process that can affect the optical and mechanical properties of ceramics. In this study, we aimed to evaluate the translucency and flexural strength of lithium disilicate glass–ceramic for CAD/CAM using different thermal refinement schedules and thicknesses by measuring the total transmission of light through the specimen and calculating the peak load of the specimen until fracture in a piston-on-three-ball test, respectively. The results showed that a lower translucency was exhibited in thicker specimens, and the flexural strength decreased in the order of 1.0, 0.5, and 2.0 mm (<i>p</i> < 0.05). The lithium disilicates thermally refined at a heat of 820 degrees were shown to have the highest biaxial flexural strength (<i>p</i> < 0.05). These findings suggest that it is possible to adjust transparency and strength according to the clinical situation by choosing an appropriate thickness and thermal refinement process.https://www.mdpi.com/1996-1944/17/2/396lithium disilicate glass–ceramicprocess: translucencyflexural strengthfiring temperaturethickness |
| spellingShingle | Chong-Yang Li Kyung-So Jeong Jae-Seob Shin Ji-Suk Shim Jae-Jun Ryu Translucency and Strength of Lithium Disilicate for Computer-Aided Design and Manufacturing at Different Thermal Temperatures and Thicknesses: An In Vitro Study Materials lithium disilicate glass–ceramic process: translucency flexural strength firing temperature thickness |
| title | Translucency and Strength of Lithium Disilicate for Computer-Aided Design and Manufacturing at Different Thermal Temperatures and Thicknesses: An In Vitro Study |
| title_full | Translucency and Strength of Lithium Disilicate for Computer-Aided Design and Manufacturing at Different Thermal Temperatures and Thicknesses: An In Vitro Study |
| title_fullStr | Translucency and Strength of Lithium Disilicate for Computer-Aided Design and Manufacturing at Different Thermal Temperatures and Thicknesses: An In Vitro Study |
| title_full_unstemmed | Translucency and Strength of Lithium Disilicate for Computer-Aided Design and Manufacturing at Different Thermal Temperatures and Thicknesses: An In Vitro Study |
| title_short | Translucency and Strength of Lithium Disilicate for Computer-Aided Design and Manufacturing at Different Thermal Temperatures and Thicknesses: An In Vitro Study |
| title_sort | translucency and strength of lithium disilicate for computer aided design and manufacturing at different thermal temperatures and thicknesses an in vitro study |
| topic | lithium disilicate glass–ceramic process: translucency flexural strength firing temperature thickness |
| url | https://www.mdpi.com/1996-1944/17/2/396 |
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