Marouf N, Sidhu S K
United Medical and Dental Schools (UMDS), Department of Conservative Dentistry, Guy's Hospital, London, England.
Oper Dent. 1998 Jan-Feb;23(1):10-4.
There are several resin-modified glass-ionomer restorative materials available to the dental profession today. The commercially available brands are presented in a range of shades. There is little information on their radiopacity and whether this varies with differences in shade. While the general radiopacity of various products may have been studied, only assumptions are available regarding their consistency between shades. The purpose of this study was to investigate if there were any significant differences in the radiopacity of the shades available within each commercial product. The products evaluated were Fuji II LC, Vitremer, and Photac-Fil. The optical densities of standardized radiographs of samples of these materials were determined and radiopacity values of materials expressed in millimeter equivalents of aluminum. Of the three resin-modified glass-ionomer restorative materials tested, Fuji II LC was the most radiopaque and Photac-Fil the least. Fuji II LC and Vitremer showed radiopacity values equivalent to > 2.5 mm and > 1.5 mm aluminum respectively; Photac-Fil demonstrated very low radiopacity values (equivalent to < 0.6 mm aluminum). Statistical analysis revealed that there was no significant difference in radiopacity among the shades within each of these brands.
如今，牙科行业有几种树脂改性玻璃离子修复材料可供使用。市面上的品牌有多种色调。关于它们的射线不透性以及这种不透性是否会因色调差异而变化的信息很少。虽然已经对各种产品的一般射线不透性进行了研究，但关于它们在不同色调之间的一致性只有一些假设。本研究的目的是调查每种商业产品中不同色调的射线不透性是否存在显著差异。所评估的产品有富士II LC、Vitremer和Photac - Fil。测定了这些材料样品的标准化射线照片的光密度，并以铝的毫米当量表示材料的射线不透性值。在测试的三种树脂改性玻璃离子修复材料中，富士II LC的射线不透性最高，而Photac - Fil最低。富士II LC和Vitremer的射线不透性值分别相当于大于2.5毫米铝和大于1.5毫米铝；Photac - Fil的射线不透性值非常低（相当于小于0.6毫米铝）。统计分析表明，这些品牌中每个品牌内不同色调之间的射线不透性没有显著差异。
