Abstract
Introduction: The purpose of this research was to evaluate the radiopacity of calcium enriched material cement and mineral trioxide aggregated fillapex with 3 types of sealers: Endoseal, and AH26 at different focal distances of 15 cm and 30 cm.
 Methods: The research method was an experimental and lab trial. In this research, 3 endodontic sealers: Pulpdent, Endoseal, and AH26 and two root filling material: mineral trioxide aggregated fillapex and calcium enriched material cement were studied. From each material 6 samples were prepared. The samples were prepared on a glass slab by stirring with the help of a spatula and placed in molds with dimensions of 1 x 5 x 5 mm. Radiographs were prepared with the PSP Fire CR digital sensor system at a distance of 15 and 30 cm from the samples. Radio opacity information obtained was interpreted by Quantor Dent for Windows software. The obtained results were analyzed by SPSS version 16 statistical software and Two-way ANOVA and Tukey test.
 Results: The results showed that AH26 had the highest optical density value and calcium enriched material cement had the lower radiopacity. There was a significant difference between the radiopacity value of the 5 studied materials (P<0.05).
 Conclusion: All the studied materials had the minimal standard of radiopacity.
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