van Dijken J W, Wing K R, Ruyter I E
Department of Cariology, Faculty of Odontology, University of Umeå, Sweden.
Acta Odontol Scand. 1989 Dec;47(6):401-7. doi: 10.3109/00016358909004809.
The radiopacity of 28 shades of 18 composite brands, recommended for use in Class I and Class II cavities, and one amalgam were tested in accordance with the instructions in the latest draft standards of ISO for resin-based filling materials. The composition of the inorganic fillers in the materials was analyzed by optical emission spectroscopy. Twelve composites showed radiopacity greater than enamel, for five the radiopacity was lower than that of dentin, and for two materials the radiopacity was between that of enamel and dentin. The optical emission spectroscopy analyses showed a large variety in the composition of the fillers. The elements added to increase radiopacity in the composite materials are barium, strontium, zinc, zirconium, and ytterbium.
按照ISO关于树脂基填充材料的最新标准草案中的说明，对推荐用于I类和II类洞的18个复合树脂品牌的28种色号以及一种汞合金的射线不透性进行了测试。通过光发射光谱法分析了材料中无机填料的成分。12种复合材料的射线不透性大于牙釉质，5种的射线不透性低于牙本质，2种材料的射线不透性介于牙釉质和牙本质之间。光发射光谱分析表明填料成分差异很大。添加到复合材料中以增加射线不透性的元素有钡、锶、锌、锆和镱。
