title: Utilization of bone impedance for age estimation in postmortem cases.
abstract: In the field of Forensic Medicine the number of unidentified cadavers has increased due to natural disasters and international terrorism. The age estimation is very important for identification of the victims. The degree of sagittal closure is one of such age estimation methods. However it is not widely accepted as a reliable method for age estimation. In this study, we have examined whether measuring impedance value (z-values) of the sagittal suture of the skull is related to the age in men and women and discussed the possibility to use bone impedance for age estimation. Bone impedance values increased with aging and decreased after the age of 64.5. Then we compared age estimation through the conventional visual method and the proposed bone impedance measurement technique. It is suggested that the bone impedance measuring technique may be of value to forensic science as a method of age estimation.
authors.affiliation: Department of Forensic Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan; Department of Forensic Odontology and Anthropology, Tokyo Dental College, 101-0061, Japan.
authors.forename: Noboru
authors.initials: N
authors.lastname: Ishikawa
authors.affiliation: Department of Clinical Trial Data Management, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Suganami
authors.affiliation: Department of Orthopedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nishida
authors.affiliation: Department of Forensic Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Miyamori
authors.affiliation: Department of Forensic Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Kakiuchi
authors.affiliation: Department of Clinical Trial Data Management, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan.
authors.forename: Naotake
authors.initials: N
authors.lastname: Yamada
authors.affiliation: Department of Orthopedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.
authors.forename: Kim
authors.initials: K
authors.lastname: Wook-Cheol
authors.affiliation: Department of Orthopedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Kubo
authors.affiliation: Department of Forensic Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan. Electronic address: hoi@koto.kpu-m.ac.jp.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ikegaya
mesh_terms: D000293:Adolescent; D000328:Adult; D000365:Age Determination by Skeleton / Q000379:methods*; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D003393:Cranial Sutures / Q000502:physiology*; D017097:Electric Impedance; D005260:Female; D018732:Forensic Anthropology; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D055815:Young Adult
keywords: Age estimation; Bone impedance value; Forensic anthropology; Forensic odontology; Sagittal suture; Unidentified cadavers