Sekiya K, Okamoto A, Fukushima M, Iwaku M
Department of Operative Dentistry and Endodontics, Niigata University School of Dentistry, Japan.
Dent Mater J. 1994 Jun;13(1):36-46. doi: 10.4012/dmj.13.36.
Using a scanning electron microscope (SEM) and an electron probe surface roughness analyzer (ERA), we conducted the in vivo study of the effect of various filler components on the wear of composite resins. Experimental light-cured composite resins were prepared employing three different filler components; -(1) Silica type, (2) Strontium type, and (3) Barium type. The filler content for all three types was 80 wt%, with the mean particlesize being 2.6 microns in diameter. The resin monomers consisted of 40 wt% Bis-GMA, 40 wt% TEGDMA and 20 wt% UTMA. These materials were placed in 2 mm diameter cylindrical cavities located in the OCA (occlusal contact area) or the CFA (contact free area) of cast crowns temporarily set in a volunteer patient's mouth. The crowns were removed at monthly intervals for longitudinal SEM observation. After two months, worn surfaces were also analyzed by ERA. The result showed that the wear patterns of the composites were characterized by the filler components, especially in the OCA.
我们使用扫描电子显微镜（SEM）和电子探针表面粗糙度分析仪（ERA），对各种填料成分对复合树脂磨损的影响进行了体内研究。采用三种不同的填料成分制备了实验性光固化复合树脂：-(1) 二氧化硅型，(2) 锶型，和(3) 钡型。所有三种类型的填料含量均为80 wt%，平均粒径为2.6微米。树脂单体由40 wt%的双酚A双甲基丙烯酸缩水甘油酯（Bis-GMA）、40 wt%的三乙二醇二甲基丙烯酸酯（TEGDMA）和20 wt%的脲烷改性甲基丙烯酸酯（UTMA）组成。将这些材料放置在临时固定在志愿者患者口腔中的铸造冠的咬合接触区域（OCA）或非接触区域（CFA）中直径为2毫米的圆柱形腔体内。每隔一个月取出冠进行纵向SEM观察。两个月后，还通过ERA对磨损表面进行了分析。结果表明，复合材料的磨损模式以填料成分为特征，尤其是在OCA中。
