Optical characterization of bisphenol-A-glycidyldimethacrylate-triethyleneglycoldimethacrylate (BisGMA/TEGDMA) monomers and copolymer

Dental Materials : Official Publication of the Academy of Dental Materials
Janne LehtinenRolf Hernberg

Abstract

The fundamental optical characteristics of dental polymers as a function of curing time are exiguously reported in the literature. In this work the refractive index [1] and the extinction coefficient [2] of bisphenol-A-glycidyldimethacrylate-triethyleneglycoldimethacrylate (BisGMA/TEGDMA)-based polymers of different volume fractions have been studied as a function of the curing time. A comparison between the measured index of refraction and theoretical calculation based on molar refraction is made. Also the temporal behavior of both the refractive index and extinction coefficient is compared. Index of refraction: BisGMA/TEGDMA monomer samples were cured with a commercial light-curing unit by using camphorquinone and DMAEMA as the photoinitiator system. Curing times of 0, 40, 60, 300, 900 and 1800 s were used. The refractive indices were determined with a refractometer at 470 nm wavelength, where the peak absorption of the camphorquinone photoinitiator is located. Extinction coefficient: BisGMA/TEGDMA samples having different lengths were cured and the relative attenuation of light at 470 nm was measured as a function of the curing time (0, 40, 60, 300, 900, 1800 s). The results show that in general the index of refraction incre...Continue Reading

References

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Citations

May 26, 2011·Journal of Materials Science. Materials in Medicine·Sufyan GaroushiPekka K Vallittu
Mar 25, 2014·Dental Materials : Official Publication of the Academy of Dental Materials·Robert L Erickson, Wayne W Barkmeier
Jul 17, 2012·Photomedicine and Laser Surgery·Dong-In YunYong Hoon Kwon
Oct 6, 2012·Dental Materials Journal·Aromi KangJeong-Kil Park
Mar 25, 2014·Dental Materials : Official Publication of the Academy of Dental Materials·Robert L EricksonRolf H Halvorson
Feb 4, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Yan LiuGuo He
Jun 4, 2013·Dental Materials : Official Publication of the Academy of Dental Materials·Sufyan GaroushiLippo Lassila
Jul 27, 2010·Acta Biomaterialia·Andrea TravanSergio Paoletti
Sep 16, 2015·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Vesna MileticMiroslav D Dramićanin
Jul 16, 2013·Journal of Dentistry·Sarah S MikhailWilliam M Johnston
Nov 9, 2010·Journal of Dental Research·A M BalloP K Vallittu
Feb 27, 2018·Journal of Investigative and Clinical Dentistry·Sufyan GaroushiLippo Lassila
Mar 6, 2018·The Journal of Advanced Prosthodontics·Ferhan EgilmezLippo Veli Juhana Lassila
Dec 24, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Márk FráterSufyan Garoushi

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