Journal
DENTAL MATERIALS
Volume 26, Issue 8, Pages 807-820Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dental.2010.04.006
Keywords
Zirconia; Dental ceramics; Tetragonal-to-monoclinic transformation; Low temperature degradation-aging; Stabilizer; Residual stress; Grain size; Engineering guidelines
Funding
- FONDO TRIESTE
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This review presents a critical survey of all experimental data about the low temperature degradation of zirconia (often referred to as aging) due to the tetragonal-to-monoclinic transformation, which have been collected at temperatures of interest for dental application (room temperature to about 100 degrees C). It is shown that the main factors affecting the aging phenomenon are (i) the stabilizer type and content, (ii) the residual stress and (iii) the grain size. It is also shown that extrapolating the low temperature degradation rate from accelerated aging tests can lead to unacceptable conclusions about the lifetime of the zirconia-based components. Finally, based on the experimental evidence, a set of engineering guidelines for the use of zirconia in restorative and prosthetic dentistry is proposed. (C) 2010 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
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