OBJECTIVE To evaluate the influence of extrinsic pigmentation on the biaxial flexural strength and surface topographic of translucent Y-TZP (InCoris TZI - Sirona - USA) subjected to several surface treatments. METHODS Sintered zirconia discs-shaped specimens (n=120) (ø:12mm; thickness:1.2mm; ISO 6872) were prepared and divided (n=15) according to various factors: "extrinsic pigmentation" (n: without; p: with) and "surface treatments" (C: control - as sintered; A: abraded with silica-coated alumina particles (30μm); G: glazed with a thin film of low-fusing porcelain glaze; GH: glazed and etched with 10% hydrofluoridric acid for 60s. Mechanical cycling (1.2×106 cycles, 200N, 3.8Hz) and flexural strength test (1mm/min - 1000kg cell) were performed. Two-way ANOVA and Tukey's were used for statistical test (α=0.05). Weibull analysis was used to evaluate the strength reliability. Samples were analyzed via (1) an optical profilometer to determine the surface roughness (Ra); (2) an X-ray diffraction (XRD) to evaluate phase transformations; and (3) a SEM equipped with an energy dispersive X-ray spectroscopy (EDX) to elucidate morphological properties and chemical compositions. RESULTS Regardless of the surface treatment (p=0.5459) (Cn: 560.16MPa; Gn: 573.36MPa; An: 643.51MPa; GHn: 542.94MPa; Cp: 628.04MPa; Gp: 641.90MPa; Ap: 554.47MPa; GHp :602.84MPa) and extrinsic pigmentation (p=0.1280) there was no difference in the flexural strength among the experimental groups. According to the XRD analysis, phase transformations occurred in the An group (t→m) and in Ap group (t→c). Surface roughness was affected by surface treatments (An - p=0.001) and extrinsic pigmentation (Gp - p=0.001). SIGNIFICANCE The biaxial flexural strength of the tested samples was not affected neither by surface treatments nor by pigmentation, although it can cause phase transformation and promote surface roughness.

中文翻译：

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半透明 ZrO2 陶瓷循环加载后外源色素沉着和表面处理对双轴弯曲强度的影响。


目的 评估外在色素沉着对经过多种表面处理的半透明 Y-TZP（InCoris TZI - Sirona - 美国）的双轴弯曲强度和表面形貌的影响。方法 制备烧结氧化锆圆盘状样品 (n=120) (ø:12mm; 厚度:1.2mm; ISO 6872)，并根据各种因素进行划分 (n=15)：“外在色素沉着”（n：无；p：和“表面处理”（C：对照 - 烧结态；A：用二氧化硅涂层氧化铝颗粒（30μm）打磨；G：用低熔点瓷釉薄膜上釉；GH：上釉并用 10% 蚀刻采用氢氟酸60s的机械循环（1.2×106循环，200N，3.8Hz）和弯曲强度测试（1mm/min - 1000kg细胞）进行统计检验（α=0.05）。威布尔分析用于评估强度可靠性，通过 (1) 光学轮廓仪测定表面粗糙度 (Ra)；(2) 通过 X 射线衍射 (XRD) 评估相变；配备能量色散 X 射线光谱 (EDX) 的 SEM 可阐明形态特性和化学成分 结果 无论表面处理如何 (p=0.5459) (Cn: 560.16MPa；耐压：573.36MPa；安：643.51MPa；气压：542.94MPa；压力：628.04MPa；气压：641.90MPa； Ap：554.47MPa； GHp：602.84MPa）和外在色素沉着（p=0.1280）实验组之间的弯曲强度没有差异。根据XRD分析，An基团(t→m)和Ap基团(t→c)发生相变。表面粗糙度受表面处理 (An - p=0.001) 和外在色素沉着 (Gp - p=0.001) 的影响。 意义 测试样品的双轴弯曲强度既不受表面处理的影响，也不受色素沉着的影响，尽管它会引起相变并促进表面粗糙度。