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Open AccessArticle

Effect of Beverages on Viscoelastic Properties of Resin-Based Dental Composites

Army Medical College, National University of Sciences and Technology, Islamabad 44000, Pakistan
Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Lahore 54000, Pakistan
Centre for Oral Growth and Development, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AD, UK
Kroto Research Institute, Department of Materials Science and Engineering, University of Sheffield, Sheffield S3 7HQ, UK
Author to whom correspondence should be addressed.
Academic Editor: Klara Hernadi
Materials 2015, 8(6), 2863-2872;
Received: 30 January 2015 / Revised: 12 May 2015 / Accepted: 13 May 2015 / Published: 26 May 2015
(This article belongs to the Special Issue Dental Materials)
The viscoelastic properties of three commercially available resin-based composites (Filtek™ P60, Filtek™ Supreme, and Filtek™ Z250; 3M ESPE, Bracknell, UK) were measured to determine the effect of beverages on their storage moduli and damping ratios. Rectangular samples of the three hybrid composites were immersed in three beverages at 37 °C for 1, 7, 30, and 60 days. At each time interval, these samples were subjected to three-point bend tests in temperature mode using a Perkin Elmer DMA7 Dynamic Mechanical Analyzer (Perkin Elmer Corp., Waltham, MA, USA) to measure the storage modulus and damping ratio. The immersion time had significant influence on the viscoelastic property of composites and it was found that generally for all samples the storage modulus was reduced, whereas damping values increased with immersion time. The viscoelastic behavior of tested materials seems to be related to the pH environment, hydrophilicity and the chemical composition of composites. View Full-Text
Keywords: dental composites; beverages; viscoelasticity; storage modulus dental composites; beverages; viscoelasticity; storage modulus
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MDPI and ACS Style

Kaleem, M.; Khan, A.S.; Rehman, I.U.; Wong, F.S. Effect of Beverages on Viscoelastic Properties of Resin-Based Dental Composites. Materials 2015, 8, 2863-2872.

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