Improvement in wear resistance of indirect composites by means of high-intensity light-polymerizing systems

本研究的目的是评估底漆对复合材料-金属界面的牙刷-牙刷磨损的影响。平板试样由T-Alloy H（GC corp.）纯钛金属它们是用70 μm氧化铝研磨的空气传播颗粒，并且未涂底漆或用两种类型的底漆进行调节。一种底漆是专为贵金属设计的合金底漆（可乐丽），另一种是Estenia C&B不透明底漆（可乐丽）材料。将Estenia C&B OA 3（Kuraray）光聚合不透明树脂和Estema C&B E1（Kuraray）间接复合材料粘结到金属试样的侧面。试验前，所有样本均在37℃蒸馏水中储存2周。牙刷磨损测试用3.4N垂直载荷和20，000往复冲程进行，并使用Crest（P&G）摩擦计。通过扫描激光显微镜（1 LM 21）测定磨损深度，并通过Mann-Whitney U检验（P=0.05水平）分析结果。通过扫描电子显微镜（S54300）观察磨损表面。涂底漆组和未涂底漆组的平均磨损深度（单位：μm，n=8）（括号内为标准差）分别为3.5（0.5）和8.0（1.4）。预致敏组与未预致敏组之间的差异有统计学意义。扫描电子显微镜观察到，不透明树脂明显检测到未涂底漆的样品的特征磨损图案，而涂底漆的样品没有显示出明显的磨损图案。可以认为，底漆的应用是有用的，因为在复合材料-金属界面处的粘结试样的耐磨性增强。

The aim of this study was to evaluate effect of primer on toothbrush-dentifrice abrasion of composite-metal interface. Flat plate specimens were cast from the T-Alloy H (GC corp.) pure titanium metal. They were air-borne particle abraded with 70 μm alumina, and were either unprimed or conditioned with two types of primers. One primer is designed for noble metals as an Alloy Primer (Kuraray), and the other is the Estenia C&B Opaque Primer (Kuraray) material. An Estenia C&B OA3 (Kuraray) light-polymerized opaque resin and an Estema C&B E1 (Kuraray) indirect composite were bonded to the side of metal specimens. All specimens were stored in 37℃ distilled water for 2 weeks prior to testing. Toothbrush abrasion test was performed with 3.4 N vertical load and 20,000 reciprocal strokes, and used the Crest (P&G) dentifrice. Wear depth was determined by means of a scanning laser microscope (1LM21) and the results were analyzed by Mann-Whitney U test (P=0.05 level). Worn surfaces were observed by scanning electron microscope (S54300). The average wear depths in μm (n=8) with standard deviations in parentheses were 3.5 (0.5) for the primed group and 8.0 (1.4) for the unprimed group. Significant difference was found between the primed group and the unprimed group. Scanning electron microscopic was observed that the opaque resin was conspicuously detected characteristic worn pattern for unprimed specimens, whereas primed specimens did not show apparent worn pattern. It can be considered that application of the primer was useful as enhanced wear resistance of the bonded specimens at the composite-metal interface.