Sekiya K, Okamoto A, Fukushima M, Iwaku M
Department of Operative Dentistry and Endodontics, Niigata University School of Dentistry, Japan.
Dent Mater J. 1993 Dec;12(2):145-58. doi: 10.4012/dmj.12.145.
This study investigated the effects of various monomer systems on composite resin wear in vivo. Experimental light-cured composite resins were prepared employing four different monomer systems: (1) Bis-GMA type, (2) D-2. 6E type, (3) UDMA type, (4) UTMA type. The resin monomers consisted of 70wt% main monomer and 30wt% TEGDMA. These composites contained 80wt% fine quartz. The resins were placed in 2 mm diameter cylindrical cavities located in the occlusal contact area or the contact free area in cast crowns, temporarily set in a mouth. The crowns were removed at monthly intervals, for longitudinal SEM observation. Two months after setting, wear was analyzed, using an electron probe surface roughness analyzer. Microabrasion of the resin matrix and loss of filler particles were observed for all types of monomer systems. The effect of matrix resin systems on occlusal wear was smaller than that of filler systems.
本研究调查了各种单体体系对复合树脂体内磨损的影响。采用四种不同的单体体系制备了实验性光固化复合树脂：（1）双酚A缩水甘油基甲基丙烯酸酯（Bis - GMA）型，（2）D - 2. 6E型，（3）二甲基丙烯酸氨基甲酸酯（UDMA）型，（4）三羟甲基丙烷三甲基丙烯酸酯（UTMA）型。树脂单体由70wt%的主单体和30wt%的三乙二醇二甲基丙烯酸酯（TEGDMA）组成。这些复合材料含有80wt%的细石英。将树脂置于铸造冠咬合接触区或无接触区直径为2mm的圆柱形窝洞中，临时固定于口腔内。每隔一个月取下牙冠，进行纵向扫描电子显微镜（SEM）观察。固化两个月后，使用电子探针表面粗糙度分析仪分析磨损情况。观察到所有类型的单体体系均存在树脂基质的微磨损和填料颗粒的损失。基质树脂体系对咬合磨损的影响小于填料体系。
