Relationships between fracture toughness, Y2O3 fraction and phases content in modern dental Yttria-doped zirconias

Belli R, Hurle K, Schürrlein J, Petschelt A, Werbach K, Peterlik H, Rabe T, Mieller B, Lohbauer U (2021)


Publication Type: Journal article

Publication year: 2021

Journal

Book Volume: 41

Pages Range: 7771-7782

Journal Issue: 15

DOI: 10.1016/j.jeurceramsoc.2021.08.003

Abstract

The relationship between fracture toughness and Yttria content in modern zirconia ceramics was revised. For that purpose, we evaluated here 10 modern Y2O3-stabilized zirconia (YSZ) materials currently used in biomedical applications, namely prosthetic and implant dentistry. The most relevant range between 2-5 mol% Y2O3 was addressed by selecting from conventional opaque 3 mol% YSZ up to more translucent compositions (4−5 mol% YSZs). A technical 2YSZ was used to extend the range of our evaluation. The bulk mol% Y2O3 concentration was measured by X-Ray Fluorescence Spectroscopy. Phase quantification by Rietveld refinement considered two tetragonal phases or an additional cubic phase. A first-account of the fracture toughness (KIc) of the pre-sintered blocks is given, which amounted to 0.4 – 0.7 MPa√m. In the fully-densified state, an inverse power-law behavior was obtained between KIc and bulk mol% Y2O3 content, whether using only our measurements or including literature data, challenging some established relationships. A linear relationship between KIc and the fraction of the transformable t-phase was established within the range of 30–70 vol%.

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APA:

Belli, R., Hurle, K., Schürrlein, J., Petschelt, A., Werbach, K., Peterlik, H.,... Lohbauer, U. (2021). Relationships between fracture toughness, Y2O3 fraction and phases content in modern dental Yttria-doped zirconias. Journal of the European Ceramic Society, 41(15), 7771-7782. https://doi.org/10.1016/j.jeurceramsoc.2021.08.003

MLA:

Belli, Renan, et al. "Relationships between fracture toughness, Y2O3 fraction and phases content in modern dental Yttria-doped zirconias." Journal of the European Ceramic Society 41.15 (2021): 7771-7782.

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