| Autor: |
Michele Mirian May, Renan Vaz Machry, Sara Fraga, Guilherme Schmitt de Andrade, Marco Antonio Bottino, Luiz Felipe Valandro, Liliana Gressler May |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Journal of biomedical materials research. Part B, Applied biomaterialsREFERENCES. |
| ISSN: |
1552-4981 |
| Popis: |
This study evaluated the effect of resin cement coating with high and low viscosities on the flexural fatigue strength of machined lithium disilicate glass-ceramic. Discs (IPS e.max CAD; Ivoclar Vivadent) were prepared and divided according to the surface condition (machining [M]-CEREC inLab; and polishing [P]-laboratory procedures), resin cement coating (with or without), and cement viscosity (high [H] and low [L]). The ceramic bonding surface was etched/primed by a one-step primer application followed by resin cement application (Variolink N base + high or low viscosity catalyst; Ivoclar Vivadent). Biaxial flexural fatigue strength was evaluated on a piston-on-three-ball set by the step-test method (n = 15) (initial stress: 60 MPa; incremental steps: 20 MPa; 10,000 cycles/step, at 20 Hz). Weibull statistics were used for fatigue data. Contact angle, topographic, and fractographic analysis were also performed. Machining produced statistically lower contact angle than polishing and a significant detrimental effect on the fatigue behavior (σ |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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