Valuation of the methods of Measuring Wear of Posterio Composite Resins

玻璃珠磨损试验报告了Tani等人(1983)的预测，粗填充的复合材料在临床耐磨性方面将不如微填充的复合材料。本研究的目的是确定不同类型的复合树脂的耐磨性的准确评价。本研究中使用的复合树脂由三种高负载粗填充复合材料组成：Clearfi AP-X(Kuraray)、Z250(3M)和Beautifi(Shofu)，两种亚微米填充复合材料；Palfique Estite(德山)和Palfique Toughwell(德山)，以及两种微填充复合材料：Silux Plus(3M)和Metafi C(太阳医疗)。用光固化法制备了5个试件(10×10×1.5 mm)。所有试件都用1200粒度的碳化硅纸抛光，以磨损200微米的待测表面。将这些样品保存在干燥器中，直到它们达到恒定的重量，然后测量每种材料的比重。由一台电动凹版…更多的y节拍。固定在水平驱动瞄准具中的试件以400g的玻璃微珠以每分钟120次的速度往复运动10000次，相当于行走2000米。磨损程度通过重量损失换算为体积损失与每种材料的比重来衡量。将两种类型的玻璃珠(东芝-巴洛蒂尼)浆液与140克表面处理过的玻璃珠(EGB)混合到100毫升水中。另一种是用表面未经处理的玻璃微珠(GB)制备的浆料。这两个玻璃珠的直径都是40微米。这些设计像一艘船一样被放置在开顶式不锈钢容器中。泥浆倒入容器中。数据分析采用双因素方差分析。结果表明，含EGb的磨损量远大于GB。与粗填充复合树脂相比，微填充复合树脂的磨损最小。这一结果表明，填料粒度对复合树脂的耐磨性是相对重要的。较少

The glas beads abrasion test reported Tani et al (1983) had forseen that the coarsefilled composites would been inferior to microfilled composites in clinical results of wear resistance. The purpose of this study was undertaken to determine an accurate appraisal of wear resistance of different types of the composite resins. The composite resins used in this study are consisted of three highly-loaded coarsefilled composites ; Clearfil AP-X (Kuraray), Z250 (3M) and Beautifil (Shofu), two submicrofilled composites ; Palfique Estelite (Tokuyama) and Palfique Toughwell (Tokuyama), and two micro filled composites ; Silux Plus (3M) and Metafil C (SUN Medical). Five specimens (10x10x1.5mm) of each material were prepared by photo-curing. All specimens were polished with a 1200 grit SiC paper to wear away 200 um from the surface to be tested. After these specimens were kept in a desiccator until they attaine a constant weight, specific gravity of each material was measured. by an electric gravit … More y meter. The specimensfixed in the horizontal drive aim, was reciprocated with a 400 g load of glass beads at a velosity of 120 strokes per minute for 10,000 times, which is equivalent to traveling 2,000 m. The degree of wear was measured by weight loss converted to volume loss with specific gravity of each material. Two trypes of glass beads (Toshiba-Ballotini) slurries were mixed with 14Og the surface-treated glass beads (EGB) to 100ml water. The other slurry was prepared with the suface-nontreated glass beads (GB). Both glass beads have 4Oum in diameter. These devise placed in the open-top stainless steel container like a ship. The slurry poured into the container. Data were analysed by two way ANOVA. It was concluded that the wear with EGB wasmuch larger than GB. The microfilled composite resin showed least wear compare to larger wear of coarsefilled composite resins. This result suggests that the filler particle size is relatively important to wear resistance of the composite resin. Less