Krejci I, Lutz F, Sener B, Jenss J
Abteilung für Präventivzahnmedizin, Parodontologie und Kariologie, Zahnärztliches Institut, Universität Zürich.
Schweiz Monatsschr Zahnmed. 1991;101(3):299-304.
For a proper radiographic diagnosis of secondary caries and interproximal overhangs or undercuts, tooth colored inlays and their appropriate luting agents have to be radiopaque. With the help of a spectrophotometer the radiopacity of 1 mm thick samples made of enamel, dentin, seven tooth colored inlay materials and seven composite cements was quantitated and related to 99.5% pure aluminum. The mean radiopacity values of three inlays (two of them significantly, p less than 0.05) and of three composite cements (one of them significantly, p less than 0.05) were lower than enamel. All other materials tested exhibited a higher radiopacity than enamel. A radiopacity value of 1 mm thick samples greater than 2.5 mm of 99.5% pure aluminum is advocated by the authors. Four of the materials tested fulfilled this requirement.
为了对继发龋、邻面悬突或倒凹进行正确的影像学诊断，牙齿颜色的嵌体及其合适的粘结剂必须具有射线阻射性。借助分光光度计，对由牙釉质、牙本质、七种牙齿颜色的嵌体材料和七种复合粘结剂制成的1毫米厚样本的射线阻射性进行了定量，并与99.5%的纯铝进行了比较。三种嵌体（其中两种差异显著，p小于0.05）和三种复合粘结剂（其中一种差异显著，p小于0.05）的平均射线阻射性值低于牙釉质。所有其他测试材料的射线阻射性均高于牙釉质。作者主张1毫米厚样本的射线阻射性值应大于99.5%纯铝的2.5毫米。所测试的材料中有四种满足这一要求。
