[The x-ray opacity of tooth-coloring inlay materials and composite cements].
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.
Krejci
I
I
Abteilung für Präventivzahnmedizin, Parodontologie und Kariologie, Zahnärztliches Institut, Universität Zürich.
Lutz
F
F
Sener
B
B
Jenss
J
J
D003116:Color; D003188:Composite Resins / Q000528:radiation effects*; D003738:Dental Cements / Q000528:radiation effects*; D003743:Dental Enamel / Q000000981:diagnostic imaging; D003764:Dental Materials / Q000528:radiation effects*; D003804:Dentin / Q000000981:diagnostic imaging; D006801:Humans; D007284:Inlays; D008422:Materials Testing; D011859:Radiography; D013053:Spectrophotometry; D014070:Tooth
D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials