Dent Mater J:空气悬浮颗粒打磨和酸碱处理对牙科氧化锆剪切粘接强度的影响

2018-11-04 lishiting MedSci原创

这篇研究的目的是为了评估3种不同的表面处理方法对牙科氧化锆的表面粗糙度、形态和剪切粘接强度(SBS)的影响。

这篇研究的目的是为了评估3种不同的表面处理方法对牙科氧化锆的表面粗糙度、形态和剪切粘接强度(SBS)的影响。研究对3组热压结氧化锆块施以以下处理:1 空气悬浮颗粒打磨(APA)组(G1-APA), 50-µm Al2O3;2 APA和9%氢氟酸组(G2-HF);3 APA和氢氧化钠组(G3-NaOH)。通过原子力显微镜(AFM)评估样本的粗糙度,通过扫描电子显微镜(SEM)观察样本的形态,通过通用测试机检测SBS。AFM结果显示,表面处理后粗糙度存在变化,但各组之间的Ra未见明显差异。SEM结果显示,所有表面处理过的样本均发生了形态改变。SBS结果显示,在G1-APA=8.4±2.7 MPa 和G2-HF=3.3±0.6 MPa (p<0.05)和G2-HF and G3-NaOH=9.0±3.0 MPa (p<0.05)之间存在显著性差异(p<0.05)。G1-APA和G3-NaOH组的主要断裂类型为混合断裂(63%)。G2-HF显示出100%的粘接障碍。NaOH组的SBS有所增高,但施加了HF后却明显降低。原始出处:Flores-Ferreyra BI, Scou

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    2018-11-06 xzw115
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