An evaluation of the radiopacity of composite restorative materials used in Class I and Class II cavities
Jan W. van Dijken, Kenneth R. Wing and Eystein Ruyter | December 15th 1989
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The study showed that 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.