Towards long lasting zirconia-based composites for dental implants. Part I: innovative synthesis, microstructural characterization and in vitro stability

Biomaterials
Paola PalmeroJérôme Chevalier

Abstract

In order to fulfill the clinical requirements for strong, tough and stable ceramics used in dental applications, we designed and developed innovative zirconia-based composites, in which equiaxial α-Al2O3 and elongated SrAl12O19 phases are dispersed in a ceria-stabilized zirconia matrix. The composite powders were prepared by an innovative surface coating route, in which commercial zirconia powders were coated by inorganic precursors of the second phases, which crystallize on the zirconia particles surface under proper thermal treatment. Samples containing four different ceria contents (in the range 10.0-11.5 mol%) were prepared by carefully tailoring the amount of the cerium precursor during the elaboration process. Slip cast green bodies were sintered at 1450 °C for 1 h, leading to fully dense materials. Characterization of composites by SEM and TEM analyses showed highly homogeneous microstructures with an even distribution of both equiaxial and elongated-shape grains inside a very fine zirconia matrix. Ce content plays a major role on aging kinetics, and should be carefully controlled: sample with 10 mol% of ceria were transformable, whereas above 10.5 mol% there is negligible or no transformation during autoclave treatment....Continue Reading

References

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Citations

Dec 26, 2015·ACS Applied Materials & Interfaces·Jian LiuK Jiang
Jul 3, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Sebastian WilleMatthias Kern
Aug 10, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Andreas Kailer, Marc Stephan
May 17, 2017·Dental Materials : Official Publication of the Academy of Dental Materials·Jasna CotičAndraž Kocjan
Jan 15, 2017·Dental Materials : Official Publication of the Academy of Dental Materials·Brigitte AltmannThorsten Steinberg
Feb 14, 2016·Journal of Materials Chemistry. B, Materials for Biology and Medicine·D BarataP Habibovic
Aug 21, 2020·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Isabelle DenryJulie A Holloway
Jun 9, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Renan BelliUlrich Lohbauer
Jul 10, 2021·Dental Materials : Official Publication of the Academy of Dental Materials·Doriane ChacunBrigitte Grosgogeat

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