Research Papers: Sensing

Nondestructive observation of teeth post core-space using optical coherence tomography: comparison with microcomputed tomography and live images

[+] Author Affiliations
Takuya Minamino, Atsushi Mine, Mariko Matsumoto, Tomoshige Kabetani, Mami Higashi, Asuka Kawaguchi, Hirofumi Yatani

Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan

Yoshihiko Sugawa, Masato Ohmi

Osaka University Graduate School of Medicine, Course of Health Science, 1-7 Yamadaoka, Suita, Osaka 565-0871, Japan

Kunio Awazu

Osaka University Graduate School of Engineering, Medical Beam Physics Laboratory, 2-1-A14 Yamadaoka, Suita, Osaka 565-0871, Japan

J. Biomed. Opt. 20(10), 107001 (Oct 06, 2015). doi:10.1117/1.JBO.20.10.107001
History: Received June 2, 2015; Accepted September 15, 2015
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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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Takuya Minamino ; Atsushi Mine ; Mariko Matsumoto ; Yoshihiko Sugawa ; Tomoshige Kabetani, et al.
"Nondestructive observation of teeth post core-space using optical coherence tomography: comparison with microcomputed tomography and live images", J. Biomed. Opt. 20(10), 107001 (Oct 06, 2015). ; http://dx.doi.org/10.1117/1.JBO.20.10.107001


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