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The Scientific World Journal
Volume 2016, Article ID 6389347, 5 pages
Research Article

Radiopacity of Methacrylate and Silorane Composite Resins Using a Digital Radiographic System

1Department of Restorative Dentistry, Universidade Federal do Maranhão (UFMA), School of Dentistry, São Luís, MA, Brazil
2Universidade Ceuma (UniCeuma), School of Dentistry, Graduate Program in Dentistry, São Luís, MA, Brazil
3Department of Radiology, Universidade Ceuma (UniCeuma), School of Dentistry, São Luís, MA, Brazil
4Department of Restorative Dentistry, Universidade Ceuma (UniCeuma), School of Dentistry, São Luís, MA, Brazil

Received 8 April 2016; Revised 16 July 2016; Accepted 16 August 2016

Academic Editor: Paulo Henrique Perlatti D’Alpino

Copyright © 2016 Leily Macedo Firoozmand et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The aim of this study was to evaluate the radiopacity of silorane and methacrylate resin composites, comparing them to the enamel, dentin, and aluminum penetrometer using a digital image. From six resin composites (Filtek P90, Filtek Z350, Filtek Z350 XT flow, Tetric Ceram, TPH Spectrum, and SureFil SDR flow) cylindrical disks (5 × 1 mm) were made and radiographed by a digital method, together with a 15-step aluminum step-wedge and a 1 mm slice of human tooth. The degree of radiopacity of each image was quantified using digital image processing. The mean values of the shades of gray of the tested materials were measured and the equivalent width of aluminum was calculated for each resin. The results of our work yielded the following radiopacity values, given here in descending order: Tetric Ceram > TPH > SDR > Z350 > Z350 flow > P90 > enamel > dentin. The radiopacity of the materials was different both for the enamel and for the dentin, except for resin P90, which was no different than enamel. In conclusion, silorane-based resin exhibited a radiopacity higher than dentin and closest to the enamel; a large portion of the methacrylate-based flow and conventional resins demonstrated greater radiopacity in comparison to dentin and enamel.