The effect of bioglass addition on mechanical and physical properties of photoactive UDMA-TEGDMA resin composites

Laura C. Nicolae*, Richard M. Shelton, Paul R. Cooper, Richard A. Martin, William M. Palin

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference publication

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.

Original languageEnglish
Title of host publicationBioceramics 25
PublisherScientific.net
Pages215-221
Number of pages7
DOIs
Publication statusPublished - 2014
Event25th symposium and annual meeting of the International Society for Ceramics in Medicine - Bucharest, Romania
Duration: 7 Nov 201310 Nov 2013

Publication series

NameKey engineering materials
PublisherScientific.net
Volume587
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Symposium

Symposium25th symposium and annual meeting of the International Society for Ceramics in Medicine
Abbreviated titleBioceramics 25
CountryRomania
CityBucharest
Period7/11/1310/11/13

Keywords

  • 45S5 Bioglass
  • Barium silicate glass
  • Dimethacrylate resin
  • Hard tissue repair
  • Photopolymerisation

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