Fatigue strength of bilayer yttria-stabilized zirconia after low-temperature degradation
Pereira RM, Belli R, Lohbauer U, Hurle K, Campos TMB, Thim GP (2024)
Publication Language: English
Publication Type: Journal article
Publication year: 2024
Journal
Book Volume: 160
Article Number: 106725
DOI: 10.1016/j.jmbbm.2024.106725
Abstract
This study examined the impact of interfacial interactions on bilayer yttria-stabilized zirconia (YSZ) used in dental restorations. In-house bilayer structures of 3YSZ and 5YSZ composition underwent hydrothermal degradation to compare the properties of control and low-temperature degradation (LTD) treated groups. Biaxial flexural strength via piston-on-three-balls, staircase fatigue strength over 106 cycles at 15 Hz, phase characterization and quantification through XRD and Rietveld refinement, and fractography were conducted. Weibull analysis was employed to determine the Weibull modulus and characteristic strength. Results demonstrated an enhancement in the mechanical performance of 3YSZ composition after LTD treatment, whereas the mechanical properties of 5YSZ remained largely unaffected post-degradation. Fractographic analysis revealed that failure originated at the surface tensile location across all specimen groups. These findings offer insights into the mechanical behavior of bilayer zirconia structures and reinforce the significance of hydrothermal treatment in enhancing their performance, particularly in the case of 3Y compositions.
Authors with CRIS profile
Renan Belli
Department of Operative Dentistry and Periodontology
Ulrich Lohbauer
Lehrstuhl für Zahn-,Mund- und Kieferheilkunde, insbesondere Zahnerhaltung, Parodontologie und Kinderzahnheilkunde
Katrin Hurle
Lehrstuhl für Mineralogie
Involved external institutions
Brazil (BR)How to cite
APA:
Pereira, R.M., Belli, R., Lohbauer, U., Hurle, K., Campos, T.M.B., & Thim, G.P. (2024). Fatigue strength of bilayer yttria-stabilized zirconia after low-temperature degradation. Journal of the Mechanical Behavior of Biomedical Materials, 160. https://doi.org/10.1016/j.jmbbm.2024.106725
MLA:
Pereira, Raíssa Monteiro, et al. "Fatigue strength of bilayer yttria-stabilized zirconia after low-temperature degradation." Journal of the Mechanical Behavior of Biomedical Materials 160 (2024).
BibTeX: Download