Takanashi Eriko, Kishikawa Ryuzo, Ikeda Masaomi, Inai Norimichi, Otsuki Masayuki, Foxton Richard M, Tagami Junji
Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, Japan.
Dent Mater J. 2008 Nov;27(6):780-6. doi: 10.4012/dmj.27.780.
The purpose of this investigation was to measure and compare both the surface roughness and gloss of flowable composites polished with standardized silicone carbide (SiC) papers. Four flowable and two conventional composites were used in this study. Polymerized specimens were subjected to a polishing procedure comprising 12 sequential steps from coarser to finer grits of SiC paper. At the initial polishing stage, flowable composites were more sensitive to the size of the polishing particles and thus yielded surfaces rougher than the conventional composites. Surface roughness became stable when polishing particles less than 13 microm size were used. However, although surface roughness was reduced, an esthetic gloss quality was not achieved on the resultant polished surface. On the influence of filler shape, composites with spherical fillers seemed to have the upper-hand advantage of attaining a high gloss by polishing. On the influence of polishing particle size, it was suggested that polishing should be completed with polishing particles less than 12 microm size so as to achieve clinically satisfactory surface roughness and gloss.
本研究的目的是测量和比较用标准化碳化硅（SiC）砂纸抛光的可流动复合树脂的表面粗糙度和光泽度。本研究使用了四种可流动复合树脂和两种传统复合树脂。聚合后的试样经过一个抛光程序，该程序包括从较粗到较细粒度的SiC砂纸的12个连续步骤。在初始抛光阶段，可流动复合树脂对抛光颗粒的尺寸更为敏感，因此其表面比传统复合树脂更粗糙。当使用小于13微米尺寸的抛光颗粒时，表面粗糙度变得稳定。然而，尽管表面粗糙度降低了，但在所得的抛光表面上并未获得美观的光泽质量。关于填料形状的影响，具有球形填料的复合树脂似乎在通过抛光获得高光泽方面具有优势。关于抛光颗粒尺寸的影响，建议应使用小于12微米尺寸的抛光颗粒完成抛光，以获得临床上令人满意的表面粗糙度和光泽度。
