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Proceedings Paper

Imaging of dental material by polarization-sensitive optical coherence tomography
Author(s): Sabine Dichtl; Angela Baumgartner; Christoph K. Hitzenberger; Andreas Moritz; Johann Wernisch; Barbara Robl; Harald Sattmann; Rainer Leitgeb; Wolfgang Sperr; Adolf Friedrich Fercher
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Paper Abstract

Partial coherence interferometry (PCI) and optical coherence tomography (OCT) are noninvasive and noncontact techniques for high precision biometry and for obtaining cross- sectional images of biologic structures. OCT was initially introduced to depict the transparent tissue of the eye. It is based on interferometry employing the partial coherence properties of a light source with high spatial coherence ut short coherence length to image structures with a resolution of the order of a few microns. Recently this technique has been modified for cross section al imaging of dental and periodontal tissues. In vitro and in vivo OCT images have been recorded, which distinguish enamel, cemento and dentin structures and provide detailed structural information on clinical abnormalities. In contrast to convention OCT, where the magnitude of backscattered light as a function of depth is imaged, polarization sensitive OCT uses backscattered light to image the magnitude of the birefringence in the sample as a function of depth. First polarization sensitive OCT recordings show, that changes in the mineralization status of enamel or dentin caused by caries or non-caries lesions can result in changes of the polarization state of the light backscattered by dental material. Therefore polarization sensitive OCT might provide a new diagnostic imaging modality in clinical and research dentistry.

Paper Details

Date Published: 19 May 1999
PDF: 8 pages
Proc. SPIE 3593, Lasers in Dentistry V, (19 May 1999); doi: 10.1117/12.348346
Show Author Affiliations
Sabine Dichtl, Univ. of Vienna School of Dentistry (Austria)
Angela Baumgartner, Univ. of Vienna Institute of Medical Physics (Austria)
Christoph K. Hitzenberger, Univ. of Vienna Institute of Medical Physics (Austria)
Andreas Moritz, Univ. of Vienna School of Dentistry (Austria)
Johann Wernisch, Technical Univ. of Vienna (Austria)
Barbara Robl, Univ. of Vienna School of Dentistry (Austria)
Harald Sattmann, Univ. of Vienna Institute of Medical Physics (Austria)
Rainer Leitgeb, Univ. of Vienna Institute of Medical Physics (Austria)
Wolfgang Sperr, Univ. of Vienna School of Dentistry (Austria)
Adolf Friedrich Fercher, Univ. of Vienna Institute of Medical Physics (Austria)

Published in SPIE Proceedings Vol. 3593:
Lasers in Dentistry V
John D. B. Featherstone; Peter Rechmann D.D.S.; Daniel Fried, Editor(s)

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