Comparison via Digital Radiography of Radiopacity Levels of Composite Materials with Various Shades and Viscosities

Abstract

Aim of the present in vitro study is to evaluate the radiopacity levels of composite resins with various shades and viscosity. 10 mm×2 mm discs were prepared from 7 condensable and 4 flowable composites (n=10). An aluminum step wedge ranging from 2.0 to 10.0 mm in thickness was placed on the occlusal film. Digital radiographs were taken using a dental X-ray device and radiographic densities of each step of the aluminum wedge and the samples were recorded to the computer. Five readings were taken and means were calculated. One-Way Anova and Tamhane post hoc tests were performed. While G-eanial Posterior has the highest radiopacity value followed by Filtek Z550, Aelite Flo has the lowest radiopacity value. Posterior composites show higher radiopacity and flowable composites with higher filler loadings have superior radiopacity levels to condensable composites. Enamel and body shades of the composite brands have also statistically significant differences in radiopacity scores. Eventually, radiopacity level of a composite resin material is not affected by the size of fillers; however, the composition, shape and loading of the fillers can specify the radiodensity.

Keywords

radiopacity / composite resins / digital radiography / flowable composites / shade