Ultra-fine Yttria-Stabilized Zirconia for dental applications: A step forward in the quest towards strong, translucent and aging resistant dental restorations. Issue 7 (July 2023)

• Record Type: Journal Article
• Authors: Roitero, E.; Reveron, H.; Gremillard, L.; Garnier, V.; Ritzberger, C.; Chevalier, J.
• Is Part Of: Journal of the European Ceramic Society. Volume 43:Issue 7(2023)
• Page Start: 2852
• Page End: 2863
• Publication Date: 2023-07
• Subjects: Yttria-Stabilized Zirconia -- Translucency -- Nanometric -- Dental application -- Mechanical properties -- Low temperature degradation; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2022.11.048
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: To decrease the light scattering caused by birefringence of the tetragonal phase of dental Yttria-Stabilized Zirconia (YSZ), two main strategies are followed: 1) increasing Y2 O3 content to have a larger amount of non-birefringent cubic phase or 2) decreasing grain size below 100 nm to reduce their scattering coefficient. Both strategies might affect mechanical properties and aging resistance. This study shows that increasing the stabilizer content enhances both translucency and aging resistance, at the expense of mechanical properties. Nanometric-sized YSZ show, instead, very interesting compromise. Nanometric-sized zirconia stabilized with 3 mol.% of Y2 O3 possesses high strength and toughness (above 1600 MPa and 3.3 MPa m 1/2 ), aging resistance and translucency, thanks to its fully-stabilized tetragonal nano-grains. Nanometric-sized zirconia stabilized with 1.5 mol.% of Y2 O3 has the best mechanical performances (strength above 1500 MPa and toughness of 4.8 MPa m 1/2 ), still showing aging resistance and intermediate opacity. These results highlight the interest of moving towards Yttria-containing transformable tetragonal nano-ceramics for dental applications. Graphical Abstract: ga1