TheScholarsRepository@LLU: Digital Archive of Research, Scholarship & Creative Works
Abstract
The radiodensity of a composite resin can greatly influence a clinician\u27s ability to analyze a restoration for failure. The purpose of this study was to determine the relative radiopacities of 29 resin restorative materials compared to enamel, and to verify the comparable radiopacity between shades of 23 of the restorative composite resin materials. Composite resin discs measuring \u3e5mm in diameter and 2 mm in thickness were made and polymerized. Radiographs were taken of the composite resin discs, which included an aluminum step wedge for calibration and a densitometer was used to measure the radiodensity of the composite resin samples. The coefficient of variation was calculated for the data and a Wilcoxon-Rank Sum test was performed showing that all the composite resin samples were significantly different in radiodensity from the enamel control (p \u3c .0001). In 19 of the 23 pairs of composite resins (83%) there was no statically significant difference in radiodensity. The coefficient of variation ranged from 0.86% to 3.54% for the data collected. 26 of the 29 composite resin resins were more radiopaque than enamel, and 21 of the 29 had a density value of less than 0.90 D which is approximately 0.1 D less than enamel. A density value less than enamel facilitates clinicians in the diagnosis of recurrent caries, defects, and overhangs in composite resin restorations
