Influence of roughness on the efficacy of grazing incidence X-ray diffraction to characterize grinding-induced phase changes in yttria-tetragonal zirconia polycrystals (Y-TZP)

Zirconia-based dental prostheses undergo various grinding steps and heat treatments in preparation for dental patient use. Post-sintered grinding induces a tetragonal-to-monoclinic phase transformation that may lead to failure. These grinding conditions were simulated on fully sintered yttria-stabil...

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Bibliographic Details
Published in:Journal of materials science 2014-02, Vol.49 (4), p.1630-1638
Main Authors: Strasberg, Matthew, Barrett, Allyson A., Anusavice, Kenneth J., Mecholsky, John J., Nino, Juan C.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Crystals
Diamonds
Diffraction
Grazing incidence
Grinding
Materials Science
Phase transitions
Polycrystals
Polymer Sciences
Prostheses
Raman spectroscopy
Regeneration
Sintering
Solid Mechanics
Tetragonal zirconia
Tetragonal zirconia polycrystals
X-ray diffraction
X-rays
Yttria-stabilized zirconia
Yttrium oxide
Zirconium
Zirconium dioxide
Zirconium oxide
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Summary:Zirconia-based dental prostheses undergo various grinding steps and heat treatments in preparation for dental patient use. Post-sintered grinding induces a tetragonal-to-monoclinic phase transformation that may lead to failure. These grinding conditions were simulated on fully sintered yttria-stabilized zirconia (Ivoclar IPS e.max ZirCAD, Ivoclar Vivadent, Schaan, Liechtenstein) using two applied loads (10 and 40 N) and different sizes of diamond grinding media (15-, 45-, and 70-μm particles). X-ray diffraction (XRD) and Raman spectroscopy were shown to be inadequate to analyze the monoclinic phase within the surface. Grazing incidence XRD correctly identified the presence of monoclinic phase on the ground zirconia surfaces. However, we conclude that, given the resulting ground microstructure, this technique only provides a qualitative measure for the depth profiles of the monoclinic phase for different grinding conditions. It was shown that regeneration of zirconia converts all monoclinic phase to the tetragonal phase, including conversion in specimens that were subjected to the harshest grinding conditions.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-013-7846-z