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Influence of air abrasion protocols on the surface roughness of an yttria partially stabilized tetragonal zirconia ceramic

机译：空气磨蚀方案对氧化钇部分稳定的四方氧化锆陶瓷表面粗糙度的影响

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Objective: To evaluate the influence of different air abrasion protocols on the surface roughness of an yttria-stabilized polycrystalline tetragonal zirconia) (Y-TZP) ceramic, as well as the surface topography of the ceramic after the treatment. Method: Fifty-four specimens (7.5×4×7.5mm) obtained from two ceramic blocks (LAVA, 3M ESPE) were flattened with fine-grit sandpaper and subjected to sintering in the ceramic system's specific firing oven. Next, the specimens were embedded in acrylic resin and the surfaces to be treated were polished in a polishing machine using sandpapers of decreasing abrasion (600- to 1,200-grit) followed by felt discs with 10μm and 3μm polishing pastes and colloidal silica. The specimens were then randomly assigned to 9 groups, according to factors particle and pressure(n=6): Gr1- control; Gr2- Al 2O 3(50μm)/2.5 bar; Gr3- Al 2O 3(110μm)/2.5 bar; Gr4- SiO 2(30μm)/2.5 bar; Gr5- SiO 2(30μm)/2.5 bar; Gr6- Al 2O 3(50μm)/3.5 bar; Gr7- Al2O3(110μm)/3.5 bar; Gr8- SiO 2(30μm)/3.5 bar; Gr9- SiO 2(30μm)/3.5 bar. After treatments, surface roughness was analyzed by a digital optical profilometer and the morphology was examined by scanning electron microscopy (SEM). Data (μm) were subjected to statistical analysis by Dunnett's test (5%), two-way ANOVA and Tukey's test (5%). Results: The type of particle (p=0.0001) and the pressure (p=0.0001) used in the air abrasion protocols influenced the surface roughness values among the experimental groups (ANOVA). The mean surface roughness values (μm) obtained for the experimental groups (Gr2 to Gr9) were, respectively: 0.37 D; 0.56 BC; 0.46 BC; 0.48 CD; 0.59 BC; 0.82 A; 0.53B CD; 0.67 AB. The SEM analysis revealed that Al 2O 3, regardless of the particle size and pressure used, caused damage to the surface of the specimens, as it produced superficial damages on the ceramic, in the form of grooves and cracks. Conclusion: Al2O3 (110 μm/3.5 bar) air abrasion promoted the highest surface roughness on the ceramics, but it does not mean that this protocol promotes better ceramic-cement union compared to the other air abrasion protocols.
机译：目的：评估不同的空气磨损方案对氧化钇稳定多晶四方氧化锆（Y-TZP）陶瓷表面粗糙度以及处理后陶瓷表面形貌的影响。方法：将来自两个陶瓷块（LAVA，3M ESPE）的54个样品（7.5×4×7.5mm）用细砂纸弄平，并在陶瓷系统的特定烧成炉中进行烧结。接下来，将样品包埋在丙烯酸树脂中，并在待处理的表面上使用减少磨损的砂纸（600到1200粒度）在抛光机上进行抛光，然后使用带有10μm和3μm抛光膏和胶体二氧化硅的毡盘。然后根据颗粒和压力（n = 6）的因素将样本随机分为9组。 Gr2-Al 2O 3（50μm）/2.5 bar; Gr3-Al 2O 3（110μm）/2.5 bar; Gr4-SiO 2（30μm）/2.5 bar; Gr5- SiO 2（30μm）/2.5 bar; Gr6-Al 2O 3（50μm）/3.5 bar; Gr7- Al2O3（110μm）/3.5 bar; Gr8- SiO 2（30μm）/3.5 bar; Gr9- SiO 2（30μm）/3.5 bar。处理后，通过数字光学轮廓仪分析表面粗糙度，并通过扫描电子显微镜（SEM）检查形态。数据（μm）通过Dunnett检验（5％），双向ANOVA和Tukey检验（5％）进行统计分析。结果：空气磨蚀方案中使用的颗粒类型（p = 0.0001）和压力（p = 0.0001）影响了实验组（ANOVA）的表面粗糙度值。实验组（Gr2至Gr9）获得的平均表面粗糙度值（μm）分别为：0.37 D；公元前0.56年;公元前0.46; 0.48 CD;公元前0.59年; 0.82安; 0.53B CD; 0.67 AB。 SEM分析表明，无论使用何种粒度和压力，Al 2O 3都会对试样表面造成损坏，因为它以沟槽和裂纹的形式对陶瓷产生表面损伤。结论：Al2O3（110μm/ 3.5 bar）空气磨损促进了陶瓷的最高表面粗糙度，但这并不意味着与其他空气磨损方案相比，该协议促进了更好的陶瓷-水泥结合。

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