AlMutairi Reem, AlNahedh Hend, Maawadh Ahmed, Elhejazi Ahmed
Department of Restorative Dental Sciences, College of Dentistry, King Saud University, P.O. Box 93504, Riyadh 11683, Saudi Arabia.
Materials (Basel). 2021 Dec 29;15(1):244. doi: 10.3390/ma15010244.
In this study, the biaxial flexural strength (BFS) and fractography of high/ultra-translucent monolithic zirconia ceramics subjected to different mechanical surface pretreatments were evaluated. A total of 108 disc-shaped samples (12 mm diameter, 1.2 mm thickness) of three zirconia materials (5Y-ZP KATANA Zirconia UTML (ML), 3Y-TZP DD Bio ZX2 (DB), and 5Y-ZP DD cube X2 (DC)) were used. The BFS was investigated after subjecting the samples to surface treatment using air abrasion particles of two types (aluminum oxide or glass microbeads). The data were analyzed using two-way analysis of variance, followed by Scheffe's post hoc test for multiple comparisons. The mean ± standard deviation BFS for DB was highest after treatment with 50 µm AlO (1626.05 ± 31.9 MPa), with lower values being observed following treatment with 50 µm glass microbeads (1399.53 ± 24.2 MPa) and in the control sample (1198.51 ± 21.1 MPa). The mean ± standard deviation (SD) BFSs for DC and ML were the highest in the control groups. Surface air abrasion with 50 µm AlO particles and 2 bar pressure is recommended for 3Y-TZP translucent zirconia, while no abrasion of 5Y-ZP translucent zirconia ceramic.
在本研究中，对经过不同机械表面预处理的高/超透明整体氧化锆陶瓷的双轴弯曲强度（BFS）和断口形貌进行了评估。使用了三种氧化锆材料（5Y-ZP KATANA氧化锆UTML（ML）、3Y-TZP DD生物ZX2（DB）和5Y-ZP DD立方体X2（DC））的总共108个圆盘形样品（直径12毫米，厚度1.2毫米）。在使用两种类型的空气磨蚀颗粒（氧化铝或玻璃微珠）对样品进行表面处理后，研究了其双轴弯曲强度。数据采用双向方差分析进行分析，随后进行Scheffe事后检验以进行多重比较。DB在使用50 µm AlO处理后的平均±标准差双轴弯曲强度最高（1626.05±31.9 MPa），使用50 µm玻璃微珠处理后（1399.53±24.2 MPa）以及对照样品中（1198.51±21.1 MPa）的值较低。DC和ML的平均±标准差双轴弯曲强度在对照组中最高。对于3Y-TZP半透明氧化锆，建议使用50 µm AlO颗粒和2 bar压力进行表面空气磨蚀，而5Y-ZP半透明氧化锆陶瓷则无需磨蚀。
