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

Leily Macedo Firoozmand,Rudys Rodolfo De Jesus Tavarez,Marcos André Dos Santos Da Silva,Mariana Gonçalves Cordeiro,Etevaldo Matos Maia Filho

doi:10.1155/2016/6389347

Leily Macedo Firoozmand, Rudys Rodolfo De Jesus Tavarez + Show 3 more

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https://doi.org/10.1155/2016/6389347

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Abstract

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.

Highlights

Resin composites are restorative materials that have been gaining wide acceptance due to their broad clinical applications
With advances in resin composites and bonding systems, a large portion of restorations are currently performed with these materials on both posterior and anterior teeth [1]
For the purposes of comparison, a human molar extracted for orthodontic reasons was used to obtain a cross-section measuring 1 mm in thickness made using a diamond cutting disk

Summary

Introduction

Resin composites are restorative materials that have been gaining wide acceptance due to their broad clinical applications. With advances in resin composites and bonding systems, a large portion of restorations are currently performed with these materials on both posterior and anterior teeth [1]. Certain principles must be followed properly to ensure the longevity of the restoration and to avoid the occurrence of postoperative sensitivity, microleakage, and the return of caries [1]. Resin composites should be at least as radiopaque as enamel [5]. When these materials are insufficiently radiopaque, it is more difficult to view microleakage, pits, fissures, and early carious lesions on radiographs [3]

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