@inproceedings{3a154e7cfd0748ef8a93ffde2835e45f,
title = "The effect of bioglass addition on mechanical and physical properties of photoactive UDMA-TEGDMA resin composites",
abstract = "Light curable dimethacrylate resin composites undergo free radical photopolymerisation in response to blue light (wavelength 450-500 nm) and may offer superior handling and setting characteristics for novel hard tissue repair materials. The current investigation aims to determine the optimum formulation of bisphenol-A glycidyl methacrylate and triethyleneglycoldimethacrylate (bisGMA/TEGDMA) or urethane dimethacrylate (UDMA)/TEGDMA resin mixtures and the effect of Bioglass incorporation on the rate of polymerisation (RP), degree of conversion (DC) and flexural strength (FS) of light-curable filled resin composites (FRCs). Experimental photoactive resins containing a range of bisGMA, UDMA and TEGDMA ratios and/or filled with non-silanised irregular or spherical 45S5-Bioglass (50 μm; 5-40 wt%) and/or silanised silicate glass filler particulates (0.7 μm; 50-70 wt%) were tested. RP and DC were analysed in real-time using nearinfrared spectroscopy. FS of resins and FRCs were determined using three-point flexural strength tests. UDMA/TEGDMA resins exhibited increased DC compared with bisGMA/TEGDMA resins (p<0.05). The addition of spherical particles of Bioglass had a detrimental effect on the FS (p>0.05), whereas they increased DC of UDMA/TEGDMA resins (p<0.05). Addition of irregular shaped Bioglass particles increased the FS of UDMA/TEGDMA resins up to 20 wt% Bioglass (p<0.05). The flexibility and strength conferred by the urethane group in UDMA may result in enhanced physical and mechanical properties compared with conventional resins containing bulky (bisGMA) molecules. Addition of 45S5-Bioglass with specific filler content, size and morphology resulted in enhanced mechanical and physical properties of UDMA/TEGDMA composites.",
keywords = "45S5 Bioglass, Barium silicate glass, Dimethacrylate resin, Hard tissue repair, Photopolymerisation",
author = "Nicolae, {Laura C.} and Shelton, {Richard M.} and Cooper, {Paul R.} and Martin, {Richard A.} and Palin, {William M.}",
year = "2014",
doi = "10.4028/www.scientific.net/KEM.587.215",
language = "English",
series = "Key engineering materials",
publisher = "Scientific.net",
pages = "215--221",
booktitle = "Bioceramics 25",
note = "25th symposium and annual meeting of the International Society for Ceramics in Medicine, Bioceramics 25 ; Conference date: 07-11-2013 Through 10-11-2013",
}