Gelcast zirconia ceramics for dental applications combining high strength and high translucency

0556648 - ÚFM 2023 RIV US eng J - Článek v odborném periodiku
Kaštyl, J. - Šťastný, P. - Chlup, Zdeněk - Song, L. - Scasnovic, E. - Trunec, M.
Gelcast zirconia ceramics for dental applications combining high strength and high translucency.
Journal of the American Ceramic Society. Roč. 105, č. 6 (2022), s. 3909-3924. ISSN 0002-7820. E-ISSN 1551-2916
Výzkumná infrastruktura: CzechNanoLab - 90110
Institucionální podpora: RVO:68081723
Klíčová slova: biaxial flexural strength * 3 balls test * grain-size * mechanical-properties * tetragonal zirconia * fracture-toughness * aging stability * in-vitro * alumina * degradation * dental replacement * gelcasting * nanoparticles * strength * translucency * yttria stabilized * zirconia
Obor OECD: Ceramics
Impakt faktor: 3.9, rok: 2022
Způsob publikování: Omezený přístup
https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.18417

Tetragonal zirconia polycrystals (TZP) represent a favorite material for monolithic ceramic dental restorations. However, all approaches employed so far to improve the translucency of dental zirconia ceramics are accompanied by a significant decline in strength. In this investigation, we developed dental 3Y-TZP ceramics that can provide excellent strength combined with enhanced translucency. The machinable tetragonal zirconia discs and blocks were prepared from fine mesostructured zirconia particles stabilized with 3 mol% of yttria using the gelcasting method. Zirconia ceramics with an average biaxial strength of 1184 MPa and translucency of 41.1% for a 1 mm thick sample were obtained. Due to its unique microstructure, this tetragonal ceramic provided a favorable combination of high translucency comparable to the high-translucent, tetragonal/cubic 4Y-TZP and very high strength achievable only in the pure tetragonal 3Y-TZP. The applicability and resistance to low-temperature degradation of the new dental ceramics was demonstrated.
Trvalý link: http://hdl.handle.net/11104/0330985