Characterization of three commercial Y-TZP ceramics produced for their high-translucency, high-strength and high-surface area.
Characterization of three commercial Y-TZP ceramics produced for their high-translucency, high-strength and high-surface area.
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DOI：
10.1016/j.ceramint.2015.09.033
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发表时间：
2016-01-01
影响因子：
5.2
通讯作者：
Zhang Y
中科院分区：
文献类型：
--
作者：
Tong H;Tanaka CB;Kaizer MR;Zhang Y
开发高强度、半透明的氧化钇稳定四方氧化锆多晶（Y-TZP）可以显着拓宽整体氧化锆修复体的临床适应症。本研究研究了三种 Y-TZP 陶瓷的机械和光学特性：高半透明度、高强度和高表面积。对于高半透明度、高强度和高表面积，三种 Y-TZP 陶瓷 (n = 10) 的四点弯曲强度（平均值±标准误差）分别为 990 ± 39、1416 ± 33 和 1076 ± 32 MPa。对于高半透明度、高强度和高表面积，三种氧化锆 (n = 10) 的断裂韧性值（平均值±标准误差）分别为 3.24 ± 0.10、3.63 ± 0.12 和 3.21 ± 0.14 MPa m1/2。高强度氧化锆的强度和韧性值均显着高于高比表面积和高透光氧化锆。高透明度氧化锆的半透明度参数值明显高于高强度和高表面积氧化锆。然而，当厚度达到 1 毫米或更大时，所有三种氧化锆都变得基本上不透明。我们的研究结果表明，当前商用 Y-TZP 陶瓷的机械性能和光学性能之间存在微妙的平衡。
Developing yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) with high strength and translucency could significantly widen the clinical indications of monolithic zirconia restorations. This study investigates the mechanical and optical properties of three Y-TZP ceramics: High-Translucency, High-Strength and High-Surface Area. The four-point bending strengths (mean ± standard error) for the three Y-TZP ceramics (n = 10) were 990 ± 39, 1416 ± 33 and 1076 ± 32 MPa for High-Translucency, High-Strength and High-Surface Area, respectively. The fracture toughness values (mean ± standard error) for the three zirconias (n = 10) were 3.24 ± 0.10, 3.63 ± 0.12 and 3.21 ± 0.14 MPa m1/2 for High-Translucency, High-Strength and High-Surface Area, respectively. Both strength and toughness values of High-Strength zirconia were significantly higher than High-Surface Area and High-Translucency zirconias. Translucency parameter values of High-Translucency zirconia were considerably higher than High-Strength and High-Surface Area zirconias. However, all three zirconias became essentially opaque when their thickness reached 1 mm or greater. Our findings suggest that there exists a delicate balance between mechanical and optical properties of the current commercial Y-TZP ceramics.