Comparative Study of the Trueness of the Inner Surface of Crowns Fabricated from Three Types of Lithium Disilicate Blocks
Abstract
:1. Introduction
2. Materials and Methods
3. Results
4. Discussion
5. Conclusions
- The trueness of the fabricated crown depended on the type of lithium disilicate block used;
- Therefore, to ensure an excellent marginal and internal fit, consideration should be given to the marginal and internal setting space in the CAD process by referring to the variation in the trueness of the fabricated crown with the type of lithium disilicate block;
- The inner surface of the crown exhibited a different degree of trueness depending on the milling;
- The angular regions of the crown exhibited the greatest degree of error, so compensation in the CAD process is necessary.
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Lithium Disilicate Block | Material | Lot Number/Manufacturer |
---|---|---|
IPS e.max CAD (e.max) | Lithium disilicate glass ceramic | V36449/Ivoclar Vivadent |
Rosetta SM (HASS) | Lithium disilicate glass ceramic | ABD06KE1502/HASS |
VITA Suprinity (VITA) | Zirconia-reinforced lithium silicate glass ceramic | 46191/VITA |
e.max | HASS | VITA | p | |
---|---|---|---|---|
Crown Inner Region | RMS (µm), Mean ± SD | |||
Margin | 27.7 ± 2.9Aa | 28.0 ± 3.4Aa | 20.7 ± 6.6Ab | <0.001 * |
Axis | 42.6 ± 6.5Ba | 26.6 ± 11.1Ab | 27.1 ± 10.4Ab | <0.001 * |
Angular | 71.4 ± 6.3Ca | 46.8 ± 14.5Bb | 38.1 ± 7.5Bb | <0.001 * |
Occlusal | 37.2 ± 4.2Ba | 30.3 ± 5.9Ab | 22.8 ± 4.0Ac | <0.001 * |
p | <0.001 * | <0.001 * | <0.001 * | |
Overall RMS value | 42.9 ± 4.4a | 30.1 ± 9.0b | 27.3 ± 7.9b | <0.001 * |
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Son, K.; Yu, B.-y.; Yoon, T.H.; Lee, K.-b. Comparative Study of the Trueness of the Inner Surface of Crowns Fabricated from Three Types of Lithium Disilicate Blocks. Appl. Sci. 2019, 9, 1798. https://doi.org/10.3390/app9091798
Son K, Yu B-y, Yoon TH, Lee K-b. Comparative Study of the Trueness of the Inner Surface of Crowns Fabricated from Three Types of Lithium Disilicate Blocks. Applied Sciences. 2019; 9(9):1798. https://doi.org/10.3390/app9091798
Chicago/Turabian StyleSon, Keunbada, Beom-young Yu, Tae Ho Yoon, and Kyu-bok Lee. 2019. "Comparative Study of the Trueness of the Inner Surface of Crowns Fabricated from Three Types of Lithium Disilicate Blocks" Applied Sciences 9, no. 9: 1798. https://doi.org/10.3390/app9091798