The radiopacity of single‐shade composite resins: A comparative evaluation

Abstract

ObjectiveThe aim of this study was to evaluate the radiopacity of single‐shade composite resins with group and multi‐shade composite resins via a digital image analysis.Materials and MethodsDisc‐shaped (5 mm in diameter, 2 mm in thickness) specimens were prepared with one multi‐shade (Estelite Sigma Quick‐ESQ), four single‐shade (Omnichroma‐OC, Charisma Topaz One‐CTO, Vitra Unique‐VU, and ZenChroma‐ZC), three group‐shade (G‐aenial Achord‐GA, Optishade‐OS, and Estelite Asteria‐EA), and one posterior composite resin (Estelite Posterior‐EP) (n = 3). A radiographic image of all the specimens, an aluminum step‐wedge, and a 2 mm thick tooth section were taken. Mean gray values (MGV) of the specimens, enamel, and dentin were calculated by ImageJ software. Composition analysis was performed with EDS, and SEM images (×10,000) were obtained. The data were analyzed with Kruskal‐Wallis and Post hoc adjusted Bonferroni analysis (p = 0.05).ResultsThe mean MGV of CTO, the highest of all test groups, was significantly higher than OC and dentin (p = 0.04 and p = 0.009, relatively). The lowest mean MGV was also observed in a single‐shade group, OC. EDS analysis showed that the tested materials comprised various radiopaque elements.ConclusionsAll of the single‐shade and group‐shade groups exceeded the MGV value of dentin, which is clinically expected from any restorative material.Clinical SignificanceThe radiopacity properties of various single‐shade composite resins which as a category is a rising trend in esthetic dentistry were investigated. It is important for clinicians to be aware of novel materials' physical qualities including radiopacity, a daily clinical criteria for restorative materials.