Abstract
The purpose of the present study was to evaluate the effect of nanofillers on the mechanical properties of 2 sizes (diameters 0.6 and 0.9 mm) of conventional and nanofilled fiber-reinforced composites (FRCs) polymerized with conventional light-curing and additional postcuring.
The FRCs samples were divided into 8 groups (10 specimens each). Conventional FRCs with glass fibers preimpregnated with polymethyl methacrylate (groups 1, 2, 3 and 4) and FRCs with impregnating solution containing 32% nanofilled resin (groups 5, 6, 7 and 8) were tested in 2 different sections (0.6 and 0.9 mm in diameter). Two different polymerizations were analyzed: hand light-curing for 40 seconds with an halogen light, and additional postcuring for 25 minutes in a light-curing oven. Each sample was evaluated with a 3-point bending test on a universal testing machine, after 48 hours of dry storage. All of the data were statistically analyzed.
After oven postcuring, nanofilled FRCs exhibited significantly higher load values than conventional FRCs. No significant differences were found when comparing conventional and nanofilled FRCs after hand light-curing. Moreover, 0.6-mm FRCs showed significantly lower load values than 0.9-mm FRCs, both for conventional and nanofilled FRCs.
Nanofilled FRCs showed higher load values after additional oven postcuring.
J Appl Biomater Funct Mater 2015; 13(3): e296 - e299
Article Type: ORIGINAL RESEARCH ARTICLE
DOI:10.5301/jabfm.5000226
Authors
Andrea Scribante, Sarah Massironi, Giulia Pieraccini, Pekka Vallittu, Lippo Lassila, Maria Francesca Sfondrini, Paola GandiniArticle History
- • Accepted on 19/01/2015
- • Available online on 05/06/2015
- • Published online on 16/10/2015
Disclosures
This article is available as full text PDF.
Authors
- Scribante, Andrea [PubMed] [Google Scholar] 1, * Corresponding Author ([email protected])
- Massironi, Sarah [PubMed] [Google Scholar] 1
- Pieraccini, Giulia [PubMed] [Google Scholar] 1
- Vallittu, Pekka [PubMed] [Google Scholar] 2
- Lassila, Lippo [PubMed] [Google Scholar] 2
- Sfondrini, Maria Francesca [PubMed] [Google Scholar] 1
- Gandini, Paola [PubMed] [Google Scholar] 1
Affiliations
-
Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, Section of Dentistry, Unit of Orthodontics and Paediatric Dentistry, University of Pavia, Pavia - Italy -
Department of Prosthetic Dentistry and Biomaterial Research, Institute of Dentistry, University of Turku, Turku - Finland
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