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BioMed Research International
Volume 2016 (2016), Article ID 2752506, 8 pages
http://dx.doi.org/10.1155/2016/2752506
Research Article

Mechanical Properties of Calcium Fluoride-Based Composite Materials

1Department of General Dentistry, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland
2Laboratory of Material Studies, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland
3Department of Biomaterials and Experimental Dentistry, University of Medical Sciences, Poznan, 70 Bukowska St., 60-812 Poznan, Poland

Received 10 June 2016; Revised 25 October 2016; Accepted 30 October 2016

Academic Editor: Adriano Piattelli

Copyright © 2016 Monika Łukomska-Szymańska 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.

Abstract

Aim of the study was to evaluate mechanical properties of light-curing composite materials modified with the addition of calcium fluoride. The study used one experimental light-curing composite material (ECM) and one commercially available flowable light-curing composite material (FA) that were modified with 0.5–5.0 wt% anhydrous calcium fluoride. Morphology of the samples and uniformity of CaF2 distribution were analyzed using Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). Mechanical properties were tested after 24-hour storage of specimens in dry or wet conditions. Stored dry ECM enriched with 0.5–1.0 wt% CaF2 showed higher tensile strength values, while water storage of all modified ECM specimens decreased their tensile strength. The highest Vickers hardness tested after dry storage was observed for 2.5 wt% CaF2 content in ECM. The addition of 2.0–5.0 wt% CaF2 to FA caused significant decrease in tensile strength after dry storage and overall tensile strength decrease of modified FA specimens after water storage. The content of 2.0 wt% CaF2 in FA resulted in the highest Vickers hardness tested after wet storage. Commercially available composite material (FA), unmodified with fluoride addition, demonstrated overall significantly higher mechanical properties.