New multi-layered zirconias: Composition, microstructure and translucency
New multi-layered zirconias: Composition, microstructure and translucency
复制标题
DOI：
10.1016/j.dental.2019.02.017
复制
发表时间：
2019-05-01
期刊：
影响因子：
5
通讯作者：
Zhang, Yu
中科院分区：
文献类型：
--
作者：
Kolakarnprasert, Nantawan;Kaizer, Marina R.;Zhang, Yu
目标。为了充分认识新型多层氧化锆的适应症范围和临床优势，全面了解其化学成分、微观结构、耐低温降解（LTD）性能和半透明性能至关重要。选取一个氧化锆体系（Katana, Kuraray Noritake）进行研究，该体系包含3种不同等级的多层氧化锆：超半透明多层氧化锆（UTML）、超半透明多层氧化锆（STML）和多层氧化锆（ML）。采用x射线荧光（XRF）、x射线衍射（XRD）和场发射扫描电镜（FE-SEM）对不同材料及其各层的化学成分、氧化锆相分数和微观结构进行了测定。并对其耐LTD和半透明性能进行了表征。我们的研究结果表明，不同层之间没有很大的差异，但3种材料非常不同：utml: 5Y-PSZ （5mol %钇-部分稳定氧化锆）的立方含量大于(7)，平均晶粒尺寸为4.05 (+/- 0.85)μ m； STML: 4Y-PSZ的立方含量大于(6)，平均晶粒尺寸为2.81 (+/- 0.17)μ m
Objectives. To fully realize the range of indication and clinical advantages of the new multi-layered zirconias, a comprehensive understanding of their chemical composition, microstructure, low temperature degradation (LTD) resistance, and translucency properties is paramount.Methods. A zirconia system (Katana, Kuraray Noritake), including 3 distinct grades of multi-layered zirconias, was selected for study: Ultra Translucent Multi-layered zirconia (UTML), Super Translucent Multi-layered zirconia (STML), and Multi-layered zirconia (ML). For different materials and their individual layers, the chemical composition, zirconia phase fractions, and microstructure were determined by X-ray fluorescence (XRF), X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM). Also, their resistance to LTD and translucency properties were characterized.Results. Our findings revealed no major differences amongst layers, but the 3 materials were very distinct-UTML: 5Y-PSZ (5 mol% yttria-partially-stabilized zirconia) with (7) over tilde5 wt% cubic content and a 4.05 (+/- 0.85)iim average grain size, STML: 4Y-PSZ with (6) over tilde5 wt% cubic content and a 2.81 (+/- 0.17) mu m average grain size, and ML: 3Y-PSZ with