A new personal identification method using Gumbel distribution

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K19329
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 57080:Social dentistry-related
• Research Institution: Okayama University
• Principal Investigator: Okada Shunsuke 岡山大学, 大学病院, 助教 (00759681)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: 個人識別 / 身元確認 / 歯科法医学 / 法医学

Outline of Final Research Achievements

Dental personal identification is one of the main methods for the personal identification. In dental personal identification, postmortem dental information such as treatment record and distinctive characterstics in the oral region is recorded, and it will be compared with the antemortem dental information such as dental treatment record. The purpose of this research is to develop a new personal identification method by using the CT images which is becoming popular in the field of legal medicine to investigate the cause of death from postmortem CT. By analyzing the metal artifact from CT images, we aimed to deduce the dental materials used in patients.
In metal materials, titanium was discriminable, but other metal materials were undiscriminable. Non-metal materials were discriminable from each other.

Free Research Field

歯科法医学

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、新たな歯科的個人識別の可能性を示唆するものであり、既存の手法では困難であった症例について識別が可能となることが考えられる。また、データ解析による個人識別手法であるため、大規模災害など現地への臨場が困難なケースにおいて遠隔地からの身元確認業務の可能性についても示唆された。