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Dent Mater J:空气颗粒磨改和烧结次序对Y-TZP陶瓷和树脂水门表面的粗糙度和剪切粘接强度的影响

2018-12-19 lishiting MedSci原创

这篇研究的目的是为了评估氧化钇稳定的四方氧化锆多晶(Y-TZP)陶瓷在烧结前后经不同压力和颗粒大小的空气颗粒磨改后表面粗糙度(Ra)和剪切粘接强度(SBS)的变化。

这篇研究的目的是为了评估氧化钇稳定的四方氧化锆多晶(Y-TZP)陶瓷在烧结前后经不同压力和颗粒大小的空气颗粒磨改后表面粗糙度(Ra)和剪切粘接强度(SBS)的变化。

研究使用Y-TZP陶瓷块(Vita In-Ceram YZ, Vita Zahnfabrik)预备了90个样本,分为9个亚组:对照组以及分别在烧结前后,在3和4 bar压力下经50和110 µm的Al2O3空气颗粒磨改组。基于烧结的次序,在表面处理前后,使用轮廓测定器检测Ra值。热循环后,使用自粘接水门汀(Rely X U200, 3M ESPE)检测Y-TZP的SBS。采用扫描电子显微镜(SEM)和X-ray衍射技术(XRD)观察和分析每组的一个样本。

结果显示,所有表面处理过的样本表面均比对照组粗糙。在所有实验组中,ABS50-4 (烧结前在4 bar 压力下经50 µm的Al2O3空气颗粒磨改), ABS110-3和ABS110-4展现出最高的Ra值。对照组的SBS值要明显低于实验组(p<0.05),相互之间具有统计学上相似的结果。

结论:烧结前,采用空气颗粒磨改Y-TZP后再烧结,可以增加四边形结构的含量。

原始出处:


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    2019-11-27 redcrab
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    2018-12-21 chenshujs
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