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Photopolymerization of dental resin as restorative material using an argon laser

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Abstract

The effect of the 488-nm wavelength of argon laser at different power densities and irradiation times on the degree of conversion (DC), temperature rise, water sorption, solubility, flexural strength, flexural modulus, and microhardness of bisphenole A glycol dimethacrylate and triethylen glycol dimethacrylate with a mass ratio of 75:25 was studied. Camphorquinone and N,N′-dimethyl aminoethyl methacrylate were added to the monomer as a photo initiator system. The DC% of the resin was measured using Fourier transform infrared spectroscopy. The maximum DC% (50%), which was reached in 20 s, and temperature rise because of the reaction (13.5°C) were both higher at 1075 than 700 mW/cm2. Water sorption and solubility were measured according to ISO4049, which in our case were 23.7 and 2.20 μg/mm3 at 1075 mW/cm2, respectively. A flexural modulus of 1.1 GPa and microhardness of 19.6 kg/mm2 were achieved above the power density. No significant difference was observed (i.e., p > 0.05) for water sorption and flexural strength at 700 and 1075 mW/cm2.

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Authors and Affiliations

  1. Faculty of Biomedical Eng, Amirkabir University of Technology, Tehran, Iran

    M. E. Khosroshahi & M. S. Nourbakhsh

  2. Iran Polymer and Petrochemical Institute, Tehran, Iran

    M. Atai

Authors
  1. M. E. Khosroshahi
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  2. M. Atai
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  3. M. S. Nourbakhsh
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Correspondence to M. E. Khosroshahi.

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Khosroshahi, M.E., Atai, M. & Nourbakhsh, M.S. Photopolymerization of dental resin as restorative material using an argon laser. Lasers Med Sci 23, 399–406 (2008). https://doi.org/10.1007/s10103-007-0487-1

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  • DOI: https://doi.org/10.1007/s10103-007-0487-1

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