Radiopacity of compomers, flowable and conventional resin composites for posterior restorations.

摘要: The objective of this study was to densitometrically determine the relative radiopacity (aluminum [Al]-equivalent values) dentin, enamel, and 20 resin composite materials currently used for posterior restorations. Specimens 5 mm in diameter 2 thick were fabricated from (n = 7) a total 140 specimens. Human molars longitudinally sectioned 2.0 include both enamel dentin. optical densities restorative materials, lead, aluminum step wedge obtained radiographic images, using transmission photodensitometer. Al equivalent (mm) each material calculated linear regression equation log normalized density thickness wedge. A logarithm plotted (r2 0.9953), radiopacities, expressed as Al, ranked ordinally. All tested, with exception an unfilled adhesive, complied ISO Standard 4049, being at least radiopaque 99.6% pure Al. Four six flowable composites had values that fell between dentin while two more than enamel. three compomers tested radiopacities greater In addition, all traditional light- chemical-cure one adhesive resin, 4049. Clinicians should be able distinguish these radiographically recurrent decay, voids, gaps, or other defects lead clinical failure. Utilization would enable clinicians tooth structure.