title: Nondestructive observation of teeth post core-space using optical coherence tomography: comparison with microcomputed tomography and live images.
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.
authors.affiliation: Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Minamino
authors.affiliation: Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Mine
authors.affiliation: Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Mariko
authors.initials: M
authors.lastname: Matsumoto
authors.affiliation: Osaka University Graduate School of Medicine, Course of Health Science, 1-7 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Sugawa
authors.affiliation: Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Tomoshige
authors.initials: T
authors.lastname: Kabetani
authors.affiliation: Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Mami
authors.initials: M
authors.lastname: Higashi
authors.affiliation: Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Asuka
authors.initials: A
authors.lastname: Kawaguchi
authors.affiliation: Osaka University Graduate School of Medicine, Course of Health Science, 1-7 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Ohmi
authors.affiliation: Osaka University Graduate School of Engineering, Medical Beam Physics Laboratory, 2-1-A14 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Kunio
authors.initials: K
authors.lastname: Awazu
authors.affiliation: Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Yatani
mesh_terms: D003786:Dental Pulp Cavity / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D006801:Humans; D066298:In Vitro Techniques; D011176:Post and Core Technique; D011861:Radiography, Dental / Q000379:methods; D041623:Tomography, Optical Coherence / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*