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Journal of Biomedical Optics • Open Access

Nondestructive observation of teeth post core-space using optical coherence tomography: comparison with microcomputed tomography and live images
Author(s): Takuya Minamino; Atsushi Mine; Mariko Matsumoto; Yoshihiko Sugawa; Tomoshige Kabetani; Mami Higashi; Asuka Kawaguchi; Masato Ohmi; Kunio Awazu; Hirofumi Yatani

Paper Abstract

No previous reports have observed inside the root canal using both optical coherence tomography (OCT) and x-ray microcomputed tomography (μCT) for the same sample. The purpose of this study was to clarify both OCT and μCT image properties from observations of the same root canal after resin core build-up treatment. As OCT allows real-time observation of samples, gap formation may be able to be shown in real time. A dual-cure, one-step, self-etch adhesive system bonding agent, and dual-cure resin composite core material were used in root canals in accordance with instructions from the manufacturer. The resulting OCT images were superior for identifying gap formation at the interface, while μCT images were better to grasp the tooth form. Continuous tomographic images from real-time OCT observation allowed successful construction of a video of the resin core build-up procedure. After 10 to 12 s of light curing, a gap with a clear new signal occurred at the root-core material interface, proceeding from the coronal side (6 mm from the cemento-enamel junction) to the apical side of the root.

Paper Details

Date Published: 6 October 2015
PDF: 5 pages
J. Biomed. Opt. 20(10) 107001 doi: 10.1117/1.JBO.20.10.107001
Published in: Journal of Biomedical Optics Volume 20, Issue 10
Show Author Affiliations
Takuya Minamino, Osaka Univ. (Japan)
Atsushi Mine, Osaka Univ. (Japan)
Mariko Matsumoto, Osaka Univ. (Japan)
Yoshihiko Sugawa, Osaka Univ. (Japan)
Tomoshige Kabetani, Osaka Univ. Dental Hospital (Japan)
Mami Higashi, Osaka Univ. Dental Hospital (Japan)
Asuka Kawaguchi, Osaka Univ. Dental Hospital (Japan)
Masato Ohmi, Osaka Univ. (Japan)
Kunio Awazu, Osaka Univ. (Japan)
Hirofumi Yatani, Osaka Univ. (Japan)

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