Crystallographic and morphological analysis of sandblasted highly translucent dental zirconia
Crystallographic and morphological analysis of sandblasted highly translucent dental zirconia
复制标题
DOI：
10.1016/j.dental.2017.12.008
复制
发表时间：
2018-03-01
期刊：
影响因子：
5
通讯作者：
Minakuchi, Shunsuke
中科院分区：
文献类型：
--
作者：
Inokoshi, Masanao;Shimizu, Haruki;Minakuchi, Shunsuke
Objective.评估氧化铝喷砂对四种高度半透明牙科氧化锆等级的影响。用50 μ m氧化铝（Al 2 O3）砂（Kulzer）对四种高度半透明氧化钇部分稳定氧化锆（Y-PSZ）等级（KATANA HT、KATANA STML、KATANA UTML、Kuraray Noritake; Zpex Smile、Tosoh）的完全烧结的氧化锆盘形试样（直径15 mm;厚度0.5 mm）进行喷砂处理或保留“烧结态”（对照）（n = 5）。对于每种氧化锆等级，使用色度计测量透明度。使用3D共聚焦激光显微镜评估表面粗糙度，然后使用Kruskal-Wallis检验（n = 10）对氧化锆等级的表面粗糙度进行统计学比较。使用具有Rietveld分析的X射线衍射（XRD）来评估氧化锆相组成。显微拉曼光谱用于评估潜在的诱导残余应力。KATANA UTML的透明度最高（36.7 +/- 1.8），而KATANA HT的透明度最低（29.5 +/- 0.9）。“氧化铝喷砂”和“烧结”氧化锆显示出相当的表面粗糙度Sa值。关于氧化锆相组成，XRD和Rietveld分析显示，“烧结态”KATANA UTML含有最高量的立方氧化锆（c-ZrO 2）相（71重量%），而KATANA HT具有最低量的c-ZrO 2相（41重量%）。KATANA STML和Zpex Smile具有相当的氧化锆相组成（60重量% c-ZrO 2相）。Al 2 O3喷砂后，所有高度半透明的氧化锆等级均检测到大量（超过25重量%）菱面体氧化锆（r-ZrO 2）相。Al 2 O3喷砂不影响三个高度半透明的Y-PSZ氧化锆等级的表面粗糙度，但它改变了其相组成。(C)2017年牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objective. To assess the influence of alumina sandblasting on four highly translucent dental zirconia grades.Methods. Fully sintered zirconia disk-shaped specimens (15-mm diameter; 0.5-mm thickness) of four highly translucent yttria partially stabilized zirconia (Y-PSZ) grades (KATANA HT, KATANA STML, KATANA UTML, Kuraray Noritake; Zpex Smile, Tosoh) were sandblasted with 50-mu m alumina (Al2O3) sand (Kulzer) or left 'as-sintered' (control) (n = 5). For each zirconia grade, the translucency was measured using a colorimeter. Surface roughness was assessed using 3D confocal laser microscopy, upon which the zirconia grades were statistically compared for surface roughness using a Kruskal-Wallis test (n = 10). X-ray diffraction (XRD) with Rietveld analysis was used to assess the zirconia-phase composition. Micro-Raman spectroscopy was used to assess the potentially induced residual stress.Results. The translucency of KATANA UTML was the highest (36.7 +/- 1.8), whereas that of KATANA HT was the lowest (29.5 +/- 0.9). The 'Al2O3-sandblasted' and 'as-sintered' zirconia revealed comparable surface-roughness Sa values. Regarding zirconia-phase composition, XRD with Rietveld analysis revealed that the 'as-sintered' KATANA UTML contained the highest amount of cubic zirconia (c-ZrO2) phase (71 wt%), while KATANA HT had the lowest amount of c-ZrO2 phase (41 wt%). KATANA STML and Zpex Smile had a comparable zirconia-phase composition (60 wt% c-ZrO2 phase). After Al2O3-sandblasting, a significant amount (over 25 wt%) of rhombohedral zirconia (r-ZrO2) phase was detected for all highly translucent zirconia grades.Significance. Al2O3-sandblasting did not affect the surface roughness of the three highly translucent Y-PSZ zirconia grades, but it changed its phase composition. (C) 2017 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.