title: Mechanical Properties of Calcium Fluoride-Based Composite Materials.
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 CaF2distribution 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% CaF2showed 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% CaF2content in ECM. The addition of 2.0-5.0 wt% CaF2to 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% CaF2in 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.
authors.affiliation: Department of General Dentistry, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland.
authors.forename: Monika
authors.identifier: 0000-0002-6110-4298
authors.initials: M
authors.lastname: Łukomska-Szymańska
authors.affiliation: Laboratory of Material Studies, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland.
authors.forename: Joanna
authors.initials: J
authors.lastname: Kleczewska
authors.affiliation: Laboratory of Material Studies, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland.
authors.forename: Joanna
authors.identifier: 0000-0003-1865-9439
authors.initials: J
authors.lastname: Nowak
authors.affiliation: Department of Biomaterials and Experimental Dentistry, University of Medical Sciences, Poznan, 70 Bukowska St., 60-812 Poznan, Poland.
authors.forename: Mariusz
authors.initials: M
authors.lastname: Pryliński
authors.affiliation: Laboratory of Material Studies, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland.
authors.forename: Agata
authors.identifier: 0000-0002-9633-5096
authors.initials: A
authors.lastname: Szczesio
authors.affiliation: Department of General Dentistry, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Podlewska
authors.affiliation: Department of General Dentistry, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland.
authors.forename: Jerzy
authors.initials: J
authors.lastname: Sokołowski
authors.affiliation: Department of General Dentistry, Medical University of Lodz, 215 Pomorska St., 92-213 Lodz, Poland.
authors.forename: Barbara
authors.initials: B
authors.lastname: Łapińska
mesh_terms: D002124:Calcium Fluoride / Q000737:chemistry* / Q000528:radiation effects; D003738:Dental Cements / Q000737:chemistry* / Q000528:radiation effects; D006244:Hardness / Q000528:radiation effects; D008027:Light; D055115:Light-Curing of Dental Adhesives / Q000379:methods*; D008422:Materials Testing; D013314:Stress, Mechanical; D013718:Tensile Strength / Q000528:radiation effects
chemical_list: D003738:Dental Cements; D002124:Calcium Fluoride