Modulation of Lithium Disilicate Translucency through Heat Treatment
Abstract
:1. Introduction
2. Materials and Methods
2.1. Specimen Preparation
2.1.1. Ceramic Block Preparation
2.1.2. Heating Schedule
2.2. Observation of Microstructure
2.3. Measurement of Optical Characteristics and Mechanical Properties
2.3.1. Visible Light Transmittance
2.3.2. Biaxial Flexural Strength
2.4. Statistical Analysis
3. Results
3.1. SEM Analysis
3.2. XRD Analysis
3.3. Translucency
3.4. Biaxial Flexural Strength
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Groups | Standby Temperature (°C) | Standby Duration (min) | Firing Temperature (°C/min) | Holding Time (min) | Vacuum on/off Temperature (°C) | Furnace Head Open Temperature (°C) |
---|---|---|---|---|---|---|
815T | 400 | 3 | 815 | 15 | 550/815 | 690 |
825T | 400 | 3 | 825 | 15 | 550/825 | 690 |
840T | 400 | 3 | 840 | 15 | 550/840 | 690 |
860T | 400 | 3 | 860 | 15 | 550/860 | 690 |
Groups | Crystal Number Mean (SD) | Crystal Size (nm) | Distance between Crystals (nm) | |||
---|---|---|---|---|---|---|
Mean | Min | Max | SD | |||
815T | 2237.6 (89.2) | 240 | 10 | 370 | 56.43 | 0.19 ± 0.05 |
825T | 837.4 (56.1) | 600 | 240 | 570 | 63.18 | 0.29 ± 0.06 |
840T | 756.1 (58.6) | 740 | 240 | 1450 | 167.25 | 0.34 ± 0.09 |
860T | 330 (14.2) | 1080 | 260 | 2760 | 584.36 | 0.43 ± 0.14 |
Groups | <200 | 200–400 | 400–600 | 600–800 | >800 |
---|---|---|---|---|---|
815T | 71.88% | 28.12% | - | - | - |
825T | - | 42.42% | 57.58% | - | - |
840T | - | 15.15% | 51.52% | 24.24% | 9.09% |
860T | - | 5.88% | 17.65% | 35.29% | 41.18% |
Results | 815T | 825T | 840T | 860T |
---|---|---|---|---|
Light transmittance percentage (%) * | 30.50 ± 0.21 d | 27.58 ± 0.38 c | 26.28 ± 0.31 b | 22.20 ± 0.38 a |
Intraclass correlation coefficient † | 0.95 | 0.98 | 0.97 | 0.97 |
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Jung, S.-K.; Kim, D.W.; Lee, J.; Ramasamy, S.; Kim, H.S.; Ryu, J.J.; Shim, J.S. Modulation of Lithium Disilicate Translucency through Heat Treatment. Materials 2021, 14, 2094. https://doi.org/10.3390/ma14092094
Jung S-K, Kim DW, Lee J, Ramasamy S, Kim HS, Ryu JJ, Shim JS. Modulation of Lithium Disilicate Translucency through Heat Treatment. Materials. 2021; 14(9):2094. https://doi.org/10.3390/ma14092094
Chicago/Turabian StyleJung, Seok-Ki, Dae Woon Kim, Jeongyol Lee, Selvaponpriya Ramasamy, Hyun Sik Kim, Jae Jun Ryu, and Ji Suk Shim. 2021. "Modulation of Lithium Disilicate Translucency through Heat Treatment" Materials 14, no. 9: 2094. https://doi.org/10.3390/ma14092094