The Influence of Cement Layer Thickness on the Stress State of Metal Inlay Restorations—Photoelastic Analysis
Abstract
:1. Introduction
- The change in cement volume does not affect shrinkage stress.
- Water absorption does not affect the state of stress.
2. Materials and Methods
2.1. Photoelastic Study—The Dependence of the Cement Layer Thickness on Shrinkage Stress
2.2. Photoelastic Study—Influence of Water Absorption on Stress State
3. Results
3.1. Photoelastic Study—Dependence of Cement Layer Thickness on Shrinkage Stress
3.2. Photoelastic Study—Influence of Water Absorption on Stress State
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Clinical Significance
References
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Material | Type | Composition | Curing Time (s) | Manufacturer |
---|---|---|---|---|
NX3 | Resin composite cement | TEGDMA, bis-GMA, fluoro-aluminosilicate glass (67.5% wt./47% vol.), activators, stabilizers, radiopaque agent | 20 | Kerr |
Maxcem Elite Chroma | Self-adhesive resin cement | HEMA, GDM, UDMA, 1,1,3,3-tetramethylbutyl hydroperoxide TEGDMA, fluoro-aluminosilicate glass, GPDM, barium glass filler, fumed silica (69% wt.) | 10 | Kerr |
Cement Layer Thickness | σr MPa | σθ MPa | Shrinkage Stress MPa |
---|---|---|---|
the cement itself | 6.6 ± 0.1 | −7.9 ± 0.1 | 14.5 ± 0.1 |
approximately 25 µm | 0.9 ± 0.1 | −2.1 ± 0.2 | 3.1 ± 0.3 |
approximately 100 µm | 2.8 ± 0.4 | −4.2 ± 0.7 | 7.0 ± 0.5 |
approximately 200 µm | 3.8 ± 0.2 | −5.4 ± 0.3 | 9.2 ± 0.5 |
approximately 400 µm | 3.8 ± 0.2 | −5.4 ± 0.3 | 9.2 ± 0.5 |
Cement Layer Thickness | σr MPa | σθ MPa | Shrinkage Stress MPa |
---|---|---|---|
the cement itself | 3.9 ± 0.4 | −5.2 ± 0.5 | 9.1 ± 0.9 |
approximately 25 µm | 0.7 ± 0.1 | −1.8 ± 0.2 | 2.6 ± 0.3 |
approximately 100 µm | 3.0 ± 0.2 | −4.6 ± 0.2 | 7.6 ± 0.4 |
approximately 200 µm | 3.9 ± 0.2 | −5.4 ± 0.2 | 9.3 ± 0.4 |
approximately 400 µm | 4.8 ± 0.2 | −5.9 ± 0.3 | 10.7 ± 0.5 |
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Sokolowski, G.; Krasowski, M.; Szczesio-Wlodarczyk, A.; Konieczny, B.; Sokolowski, J.; Bociong, K. The Influence of Cement Layer Thickness on the Stress State of Metal Inlay Restorations—Photoelastic Analysis. Materials 2021, 14, 599. https://doi.org/10.3390/ma14030599
Sokolowski G, Krasowski M, Szczesio-Wlodarczyk A, Konieczny B, Sokolowski J, Bociong K. The Influence of Cement Layer Thickness on the Stress State of Metal Inlay Restorations—Photoelastic Analysis. Materials. 2021; 14(3):599. https://doi.org/10.3390/ma14030599
Chicago/Turabian StyleSokolowski, Grzegorz, Michal Krasowski, Agata Szczesio-Wlodarczyk, Bartlomiej Konieczny, Jerzy Sokolowski, and Kinga Bociong. 2021. "The Influence of Cement Layer Thickness on the Stress State of Metal Inlay Restorations—Photoelastic Analysis" Materials 14, no. 3: 599. https://doi.org/10.3390/ma14030599