title: "High-precision, reconstructed 3D model" of skull scanned by conebeam CT: Reproducibility verified using CAD/CAM data.
abstract: Computed tomography (CT) scanning has recently been introduced into forensic medicine and dentistry. However, the presence of metal restorations in the dentition can adversely affect the quality of three-dimensional reconstruction from CT scans. In this study, we aimed to evaluate the reproducibility of a "high-precision, reconstructed 3D model" obtained from a conebeam CT scan of dentition, a method that might be particularly helpful in forensic medicine. We took conebeam CT and helical CT images of three dry skulls marked with 47 measuring points; reconstructed three-dimensional images; and measured the distances between the points in the 3D images with a computer-aided design/computer-aided manufacturing (CAD/CAM) marker. We found that in comparison with the helical CT, conebeam CT is capable of reproducing measurements closer to those obtained from the actual samples. In conclusion, our study indicated that the image-reproduction from a conebeam CT scan was more accurate than that from a helical CT scan. Furthermore, the "high-precision reconstructed 3D model" facilitates reliable visualization of full-sized oral and maxillofacial regions in both helical and conebeam CT scans.
authors.affiliation: Department of Forensic Medicine and Dentistry, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Kanagawa, Japan. Electronic address: katsumura-s@tsurumi-u.ac.jp.
authors.forename: Seiko
authors.initials: S
authors.lastname: Katsumura
authors.affiliation: Department of Forensic Medicine and Dentistry, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Kanagawa, Japan; Institute for Research and Education of Preemptive Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Kanagawa, Japan.
authors.forename: Keita
authors.initials: K
authors.lastname: Sato
authors.affiliation: Department of Fixed Prosthodontics, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Kanagawa, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Ikawa
authors.affiliation: Institute for Research and Education of Preemptive Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Kanagawa, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Yamamura
authors.affiliation: Department of Fixed Prosthodontics, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Kanagawa, Japan.
authors.forename: Eriko
authors.initials: E
authors.lastname: Ando
authors.affiliation: Department of Fixed Prosthodontics, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Kanagawa, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Shigeta
authors.affiliation: Department of Fixed Prosthodontics, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Kanagawa, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Ogawa
mesh_terms: D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003792:Dental Records; D018732:Forensic Anthropology / Q000379:methods*; D005553:Forensic Dentistry / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000295:instrumentation / Q000379:methods*; D007564:Japan; D008953:Models, Anatomic; D015203:Reproducibility of Results; D012886:Skull / Q000000981:diagnostic imaging*; D036542:Tomography, Spiral Computed / Q000379:methods*
keywords: Conebeam CT; Dental treatment; Helical CT; High-precision; Identification; Metal artifact; Reconstructed 3D model