Related Experiment Video
Updated: Nov 30, 2025
Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
Published on: January 10, 2025
Effect of image acquisition parameters on the radiopacity of bulk-fill and nanocomposite resins
Mariah Scotti Alérico1, Francine Kühl Panzarella1, Fabiana Mantovani Gomes França2
1Faculdade São Leopoldo Mandic, Instituto de Pesquisas, Division of Oral Radiology, Campinas, Brazil.
Objective:
This study evaluated the radiopacity of 2 bulk-fill resins (SonicFill and Filtek Bulk Fill) and a nanocomposite (Filtek Z350 XT) resin compared with enamel, dentin, and aluminum as measured with different exposure parameters.
Study Design:
Resin disks were radiographed together with a 1-mm human tooth section and an aluminum stepwedge, at exposure times of 0.2 and 0.32 s, and source-image (S-I) distances of 30 and 40 cm, using complementary metal oxide semiconductor (CMOS) and photostimulable phosphor systems. Grayscale values were measured using ImageJ software. Paired Student t tests were used to compare the effect of the receptor on grayscale values for each material. Analysis of variance was used to evaluate the effects of receptor, exposure parameters, and the resins on radiopacity.
Results:
All resins exhibited greater radiopacity scores than enamel and were significantly different from each other. Filtek Z350 produced the lowest radiopacity values, whereas SonicFill produced the highest. The radiopacity values were higher on images acquired with CMOS receptors. Receptor type, exposure time, S-I distance, and material, as well as many interactions of these parameters, affected the radiopacity of the resins.
Conclusion:
The tested resins complied with ISO 4049. Exposure parameters and digital receptors affected their radiopacity.
