Department of Applied Physics, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands.
Department of Fixed and Removable Prosthodontics and Biomaterials, Center for Dentistry and Oral Hygiene, University of Groningen, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV, Groningen, Netherlands.
J Mater Sci Mater Med. 2017 Aug;28(8):121. doi: 10.1007/s10856-017-5927-2. Epub 2017 Jul 6.
Degradation of yttria-stabilized zirconia dental implants abutments due to the tetragonal to monoclinic phase transformation was studied in detail by microstructural characterization using Electron Back Scatter Diffraction (EBSD). The amount and distribution of the monoclinic phase, the grain-size distribution and crystallographic orientations between tetragonal and monoclinic crystals in 3 mol.% yttria-stabilized polycrystalline zirconia (3Y-TZP) were determined in two different types of nano-crystalline dental abutments, even for grains smaller than 400 nm. An important and novel conclusion is that no substantial bulk degradation of 3Y-TZP dental implant abutments was detected after 1 year of clinical use.
通过电子背散射衍射（EBSD）的微观结构特征研究，详细研究了氧化钇稳定的氧化锆牙科植入物基台由于四方相到单斜相转变而导致的降解。在两种不同类型的纳米晶牙科基台中，确定了 3mol.%氧化钇稳定的多晶氧化锆（3Y-TZP）中四方相和单斜相之间的单斜相的数量和分布、晶粒尺寸分布和晶体取向，即使晶粒小于 400nm 也是如此。一个重要的新结论是，在临床使用 1 年后，没有检测到 3Y-TZP 牙科植入物基台的实质性体相降解。
