Coskun Mehmet Emre, Akar Turker, Tugut Faik
Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Erzincan University, Erzincan, Turkey.
J Dent Sci. 2018 Dec;13(4):293-300. doi: 10.1016/j.jds.2018.02.002. Epub 2018 Mar 30.
BACKGROUND/PURPOSE: Air-particle abrasion process used to increase surface roughness in order to increase metal-ceramic bond strength varies in each study. This study aims to optimize the air-particle abrasion protocol.
820 cylindrical nickel-chrome specimens divided equally into 82 groups (n:10). The specimens' s surfaces were air-particle abraded with 50, 110, 250 μm AlO at 25, 50,75 psi for 10, 20, 30 s at a distance of 10, 20, 30 mm. To determine the surface roughness, profilometer and atomic force microscope were used. Veneering ceramic was fired onto the specimens and shear bond tests were performed with a universal testing machine. Statistical analyzed were performed using analysis of variance (Kolmogorov-Smirnov).
The difference of surface roughness between all groups were statistically significant (P < .05). The highest surface roughness value was measured in 110 μm, 75 psi, 20 mm and 30 s. The higher bond strength values were obtained in 110 μm, 75 psi groups and no statistically significant difference was observed within each group.
While all the air-particle abrasion parameters were effective on surface roughness, only the pressure and grain size make statistically significant difference on shear bond strength.
背景/目的：用于增加表面粗糙度以提高金属-陶瓷结合强度的空气颗粒研磨工艺在每项研究中都有所不同。本研究旨在优化空气颗粒研磨方案。
820个圆柱形镍铬试样平均分为82组（每组n = 10）。试样表面用50、110、250μm的Al₂O₃在25、50、75psi压力下，在10、20、30mm的距离处分别研磨10、20、30秒。使用轮廓仪和原子力显微镜测定表面粗糙度。将饰面陶瓷烧制到试样上，并用万能试验机进行剪切粘结试验。采用方差分析（Kolmogorov-Smirnov检验）进行统计分析。
所有组之间的表面粗糙度差异具有统计学意义（P <.05）。在110μm、75psi、20mm和30秒时测得最高表面粗糙度值。在110μm、75psi组中获得较高的粘结强度值，且每组内未观察到统计学显著差异。
虽然所有空气颗粒研磨参数对表面粗糙度均有影响，但只有压力和颗粒尺寸对剪切粘结强度有统计学显著差异。
