Okamoto A, Sekiya K, Fukushima M, Kota K, Iwaku M
Department of Operative Dentistry and Endodontics, Niigata University School of Dentistry, Japan.
Dent Mater J. 1993 Jun;12(1):54-61. doi: 10.4012/dmj.12.54.
This study developed a simple method for in vivo evaluation of wear on composite resins and examined the role of filler particles in this process. Experimental light-cured composite resins with two different filler systems were prepared: (1) 81 wt% fine quartz filler (Conventional type) and (2) 73 wt% organic filler (Microfilled type). The resin monomer consisted of 50 wt% Bis-GMA and 50 wt% TEGMA. These materials were placed in cylindrical cavities 2 mm in diameter located in the OCA (occlusal contact area) or the CFA (contact free area) in Au-Pd crowns, temporarily set in a volunteer's mouth. The crowns were removed at monthly intervals for longitudinal SEM observation. Results showed that the newly developed method was useful for observing the in vivo wear-patterns of composite resins. The two experimental composite resins with different filler systems showed quite different wear-patterns.
本研究开发了一种用于体内评估复合树脂磨损的简单方法，并研究了填料颗粒在此过程中的作用。制备了具有两种不同填料体系的实验性光固化复合树脂：（1）81重量%的细石英填料（传统型）和（2）73重量%的有机填料（微填料型）。树脂单体由50重量%的双酚A缩水甘油醚（Bis-GMA）和50重量%的三乙二醇二甲基丙烯酸酯（TEGMA）组成。将这些材料置于金钯合金冠的咬合接触区（OCA）或非接触区（CFA）中直径为2毫米的圆柱形窝洞中，临时戴入志愿者口腔。每隔一个月取出冠进行纵向扫描电子显微镜（SEM）观察。结果表明，新开发的方法可用于观察复合树脂的体内磨损模式。两种具有不同填料体系的实验性复合树脂表现出截然不同的磨损模式。
