title: Radiopacity of Methacrylate and Silorane Composite Resins Using a Digital Radiographic System.
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.
authors.affiliation: Department of Restorative Dentistry, Universidade Federal do Maranhão (UFMA), School of Dentistry, São Luís, MA, Brazil.
authors.forename: Leily Macedo
authors.initials: LM
authors.lastname: Firoozmand
authors.affiliation: Universidade Ceuma (UniCeuma), School of Dentistry, Graduate Program in Dentistry, São Luís, MA, Brazil.
authors.forename: Mariana Gonçalves
authors.initials: MG
authors.lastname: Cordeiro
authors.affiliation: Department of Radiology, Universidade Ceuma (UniCeuma), School of Dentistry, São Luís, MA, Brazil.
authors.forename: Marcos André Dos Santos
authors.initials: MA
authors.lastname: Da Silva
authors.affiliation: Department of Restorative Dentistry, Universidade Ceuma (UniCeuma), School of Dentistry, São Luís, MA, Brazil.
authors.forename: Rudys Rodolfo
authors.identifier: 0000-0002-3525-9245
authors.initials: RR
authors.lastname: De Jesus Tavarez
authors.affiliation: Department of Radiology, Universidade Ceuma (UniCeuma), School of Dentistry, São Luís, MA, Brazil.
authors.forename: Etevaldo
authors.identifier: 0000-0003-3455-3220
authors.initials: E
authors.lastname: Matos Maia Filho
mesh_terms: D003188:Composite Resins / Q000528:radiation effects*; D003743:Dental Enamel / Q000528:radiation effects; D003804:Dentin / Q000528:radiation effects; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000528:radiation effects*; D019252:Radiography, Dental, Digital; D012117:Resins, Synthetic / Q000528:radiation effects*; D062047:Silorane Resins / Q000528:radiation effects*
chemical_list: D003188:Composite Resins; D008689:Methacrylates; D012117:Resins, Synthetic; D062047:Silorane Resins; C555513:silorane composite resin