• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of time since death estimation method using teeth in a body immersed in water

Research Project

Project/Area Number 17K17383
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Social dentistry
Research InstitutionTokyo Dental College

Principal Investigator

Ishikawa Noboru  東京歯科大学, 歯学部, 講師 (10772288)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords法歯学 / 死後経過時間 / 水中死体 / 身元不明死体 / 海水 / エナメル質 / 水中浸漬時間 / 個人識別 / 溺死体 / 法医学
Outline of Final Research Achievements

The purpose of this study was to develop a new method for estimating time since death for immersed bodies. The change in the amount of deposits on the tooth surface with time was analyzed using the Electron Probe X-ray Micro Analyzer. As a result, the estimation formula of time since death for the immersed body could be calculated. In addition, when the difference in water component (sea water, river water, lake water) was examined, it was suggested that it is necessary to calculate each formula by classifying it into seawater and freshwater based on the difference in the contained components. In this study, we focused on seawater and calculated the regression equation.

Academic Significance and Societal Importance of the Research Achievements

死後長期に経過した死体は、腐敗の影響から死後経過の推定は徐々に困難になる。さらに白骨化した場合においてはその傾向が顕著である。さらに水中死体の場合は死亡現場(あるいは入水現場)と発見現場が異なることがほとんどであるため、死体の身元確認のためにも死後経過時間の推定は重要である。本研究ではその点に要点を置き、法歯学的観点から死後経過時間の推定式の算出を行った。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (4 results)

All 2019 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (3 results)

  • [Journal Article] A new method for estimating time since death by analysis of substances deposited on the surface of dental enamel in a body immersed in seawater2019

    • Author(s)
      Noboru Ishikawa, Miake Yasuo, Kitamura Kei, Yamamoto Hitoshi
    • Journal Title

      International Journal of Legal Medicine

      Volume: 133(5) Issue: 5 Pages: 1421-1427

    • DOI

      10.1007/s00414-019-02020-5

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 法歯学的知識を応用した死後経過時間推定法の開発2017

    • Author(s)
      石川昂
    • Organizer
      第122回日本解剖学会総会全国学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] エナメル質表面の沈着物分析による死後経過時間推定の試み2017

    • Author(s)
      石川昂
    • Organizer
      第26回硬組織再生生物学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 歯牙付着物分析による水中浸漬時間推定法の開発 ~第二報~2017

    • Author(s)
      石川昂
    • Organizer
      日本解剖学会関東支部 第104回学術集会
    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi