Kim Hee-Kyung, Ahn Byungmin
Department of Prosthodontics, Institute of Oral Health Science, Ajou University School of Medicine, Suwon 16499, Korea.
Department of Materials Science and Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Korea.
Materials (Basel). 2021 Jan 28;14(3):610. doi: 10.3390/ma14030610.
This study investigated the effect of sandblasting particle size on the surface topography and compressive stresses of conventional zirconia (3 mol% yttria-stabilized tetragonal zirconia polycrystal; 3Y-TZP) and two highly translucent zirconia (4 or 5 mol% partially stabilized zirconia; 4Y-PSZ or 5Y-PSZ). Plate-shaped zirconia specimens (14.0 × 14.0 × 1.0 mm, n = 60 for each grade) were sandblasted using different AlO sizes (25, 50, 90, 110, and 125 μm) under 0.2 MPa for 10 s/cm at a 10 mm distance and a 90° angle. The surface topography was characterized using a 3-D confocal laser microscopy and inspected with a scanning electron microscope. To assess residual stresses, the tetragonal peak shift at 147 cm was traced using micro-Raman spectroscopy. AlO sandblasting altered surface topographies ( < 0.05), although highly translucent zirconia showed more pronounced changes compared to conventional zirconia. 5Y-PSZ abraded with 110 μm sand showed the highest Sa value (0.76 ± 0.12 μm). Larger particle induced more compressive stresses for 3Y-TZP ( < 0.05), while only 25 μm sand induced residual stresses for 5Y-PSZ. AlO sandblasting with 110 μm sand for 3Y-TZP, 90 μm sand for 4Y-PSZ, and 25 μm sand for 5Y-PSZ were considered as the recommended blasting conditions.
本研究调查了喷砂颗粒大小对传统氧化锆（3摩尔%氧化钇稳定四方氧化锆多晶体；3Y-TZP）以及两种高透明度氧化锆（4或5摩尔%部分稳定氧化锆；4Y-PSZ或5Y-PSZ）的表面形貌和压应力的影响。使用不同尺寸的AlO（25、50、90、110和125μm）在0.2MPa压力下、距离10mm、角度90°的条件下对板状氧化锆试样（14.0×14.0×1.0mm，每种等级n = 60）进行10s/cm的喷砂处理。使用三维共聚焦激光显微镜对表面形貌进行表征，并通过扫描电子显微镜进行检查。为了评估残余应力，使用显微拉曼光谱追踪147cm处的四方峰位移。AlO喷砂改变了表面形貌（P<0.05），尽管与传统氧化锆相比，高透明度氧化锆的变化更为明显。用110μm砂粒喷砂处理的5Y-PSZ的Sa值最高（0.76±0.12μm）。较大颗粒对3Y-TZP产生更多的压应力（P<0.05），而只有25μm砂粒对5Y-PSZ产生残余应力。对于3Y-TZP，推荐的喷砂条件是使用110μm砂粒；对于4Y-PSZ，推荐使用90μm砂粒；对于5Y-PSZ，推荐使用25μm砂粒。
