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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 3, Iss. 11 — Nov. 1, 2012
  • pp: 2842–2850

Terahertz time-domain spectroscopy for monitoring the curing of dental composites

Michael Schwerdtfeger, Sina Lippert, Martin Koch, Andreas Berg, Stefan Katletz, and Karin Wiesauer  »View Author Affiliations

Biomedical Optics Express, Vol. 3, Issue 11, pp. 2842-2850 (2012)

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We apply terahertz (THz) time-domain spectroscopy for monitoring the curing process of three different light-curing dental composites. Exact knowledge of the sample thickness is required for a precise determination of the THz dielectric parameters, as the materials exhibit shrinkage when they are cured. We find very small but significant changes of the THz refractive index and absorption coefficient during stepwise light exposure. The changes in the refractive index are correlated with changes in the density of the materials. Furthermore, the refractive index and the sample thickness are found to give the most reliable result for monitoring the curing process of the dental composites.

© 2012 OSA

OCIS Codes
(170.1850) Medical optics and biotechnology : Dentistry
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Spectroscopic Diagnostics

Original Manuscript: August 7, 2012
Manuscript Accepted: October 5, 2012
Published: October 16, 2012

Michael Schwerdtfeger, Sina Lippert, Martin Koch, Andreas Berg, Stefan Katletz, and Karin Wiesauer, "Terahertz time-domain spectroscopy for monitoring the curing of dental composites," Biomed. Opt. Express 3, 2842-2850 (2012)

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