Degradation of Y2O3-Stabilized ZrO2 Ceramics in Artificial Saliva: ICP Analysis of Dissolved Y3+ and Zr4+ Ions

L.E. Mukaeda; Simone Pereira Taguchi Borges; A. Robin; H.J. Izario; F.S. Salazar; Claudinei dos Santos

doi:10.4028/www.scientific.net/MSF.727-728.1136

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HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Degradation of Y2O3-Stabilized ZrO2 Ceramics in...

Degradation of Y₂O₃-Stabilized ZrO₂ Ceramics in Artificial Saliva: ICP Analysis of Dissolved Y³⁺ and Zr⁴⁺ Ions

Abstract:

ZrO₂ ceramics are one of the most important materials used in dental prostheses production, due to their excellent mechanical resistance and chemical inertness in the mouth environment. Nevertheless, the combination of low pHs and fluoride presence is able to reduce the chemical stability of these ceramics. In this work, the resistance of commercial blocks of micrometric and nanometric sized Y₂O₃-stabilized ZrO₂ ceramics (ProtMat Materiais Avançados® and Ivoclar®) was evaluated in Fusayama artificial saliva of different pHs with (and without) the presence of fluoride ions. The study was based on the analysis of the amount of Zr⁴⁺ and Y³⁺ ions dissolved in the artificial saliva after different exposure times using ICP OES technique. The XRD technique was also employed to investigate the phase transformations occurring during the degradation process in artificial saliva. The micrometric sized ZrO₂ ceramics presented higher resistance in the artificial saliva than nanometric sized structures.

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Materials Science Forum (Volumes 727-728)

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1136-1141

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.727-728.1136

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August 2012

Authors:

L.E. Mukaeda, Simone Pereira Taguchi Borges, A. Robin, H.J. Izario, F.S. Salazar, Claudinei dos Santos

Keywords:

Degradation, Dental Ceramic, Fluoride, Fusayama Saliva, pH, Zirconia

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