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Proceedings Paper

Investigations of soft and hard tissues in oral cavity by spectral domain optical coherence tomography
Author(s): Violeta Dimitrova Madjarova; Yoshiaki Yasuno; Shuichi Makita; Yasuaki Hori; Jean-Baptiste Voeffray; Masahide Itoh; Toyohiko Yatagai; Masami Tamura; Toshiyuki Nanbu
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Paper Abstract

Fourier Domain Optical Coherence Tomography (SD-OCT) systems for dental measurements are demonstrated. Two systems have been developed. The first system is fiber based Michelson interferometer with super luminescent diodes at 1310 nm and 100 nm FWHM as a light source. The sensitivity of the system was 106 dB with depth measurement range in air of 2.5 mm. The second systems is a fiber based Mach-Zehnder interferometer with wavelength scanning laser as light source at center wavelength of 1310 nm, wavelength range of 110 nm and scanning rate of 20 KHz. The sensitivity of the system is 112 dB and depth measurement range in air is 6 mm. Both systems can acquire real-time three dimensional (3-D) images in the range of several second. The systems were applied for early caries detection in tooth, for diagnostics of tooth condition after operational tooth treatment, and for diagnostics of the alveolar bone structure. In-vivo measurements were performed on two volunteers. The systems were able to detect discontinuities in tooth and resin filling after tooth treatment. In addition early carries lesion was detected in one of the volunteers. The 3-D profile of the alveolar bone was acquired for first time with non-contact method.

Paper Details

Date Published: 20 February 2006
PDF: 7 pages
Proc. SPIE 6079, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine X, 60790N (20 February 2006); doi: 10.1117/12.648359
Show Author Affiliations
Violeta Dimitrova Madjarova, Univ. of Tsukuba (Japan)
Yoshiaki Yasuno, Univ. of Tsukuba (Japan)
Shuichi Makita, Univ. of Tsukuba (Japan)
Yasuaki Hori, Univ. of Tsukuba (Japan)
Jean-Baptiste Voeffray, Univ. of Tsukuba (Japan)
Masahide Itoh, Univ. of Tsukuba (Japan)
Toyohiko Yatagai, Univ. of Tsukuba (Japan)
Masami Tamura, Shofu Inc. (Japan)
Toshiyuki Nanbu, Shofu Inc. (Japan)

Published in SPIE Proceedings Vol. 6079:
Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine X
Valery V. Tuchin; Joseph A. Izatt; James G. Fujimoto, Editor(s)

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