Comparison of Radiopacity of Dentin Replacement Materials

There are numerous commercially available dentin replacement materials but radiopacity level of these materials is unknown. The aim of this study was to evaluate radiopacity of seven dentin replacement materials in Class I cavities using a digital analysis system. TheraCal LC, Biodentine, Calcimol LC, Ultra-Blend Plus, Equia Forte, Ionoseal, and ApaCal ART were used as dentin replacement materials. Seventy molar teeth were prepared with Class I cavities and then were divided into seven groups. Each material tested was placed on floor of the cavity and then filled by Filtek Z250 composite (3M ESPE). Radiographic images were taken using an indirect digital system. Also, one disc-shaped specimen from each material was examined by energy-assisted X-ray spectroscopy for composition analysis. Radiopacity values were significantly different among materials (p < 0.0001). Ultra-Blend Plus had the lowest radiopacity values. Calcimol LC, Equia Forte, and Ionoseal had significantly higher radiopacity levels compared to other materials and enamel. All materials demonstrated significantly higher radiopacity than dentin. Materials tested had different types and amounts of radiopacifier elements. Dentin replacement materials with lower radiopacity levels can create clinical challenges for diagnostic observations on margins.