CENMAT, Materials and Natural Resources Dept., University of Trieste, Trieste I-34136, Italy.
Dent Mater. 2010 Aug;26(8):807-20. doi: 10.1016/j.dental.2010.04.006. Epub 2010 May 26.
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.
这篇综述对所有关于氧化锆低温降解（通常称为“老化”）的实验数据进行了批判性调查，这些数据是在牙科应用感兴趣的温度（室温至约 100°C）下收集的。结果表明，影响老化现象的主要因素有：（i）稳定剂的类型和含量，（ii）残余应力，以及（iii）晶粒尺寸。研究还表明，从加速老化试验推断低温降解率可能会导致对氧化锆基部件寿命的不可接受的结论。最后，根据实验证据，提出了一套在修复和义齿牙科中使用氧化锆的工程指南。
