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Related Concept Videos

Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...

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Age estimation based on pulp cavity to tooth volume ratio using postmortem computed tomography images.

Ayaka Sakuma1, Hisako Saitoh, Yoichi Suzuki

  • 1Department of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan.

Journal of Forensic Sciences
|July 25, 2013
PubMed
Summary

Dental pulp cavity size reduction aids age estimation. Multidetector-row computed tomography (MDCT) imaging of teeth provides a practical method for forensic age assessment, correlating pulp-to-tooth volume ratio with age at death.

Keywords:
dental pulpforensic dentistryforensic scienceidentificationmultidetector-row computed tomographypostmortem examination

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Area of Science:

  • Forensic Anthropology
  • Radiology
  • Dental Anatomy

Background:

  • Pulp cavity size diminishes with age, making it a potential biomarker for age estimation.
  • Accurate age determination is crucial in forensic investigations for identifying unknown remains.
  • Multidetector-row computed tomography (MDCT) is increasingly utilized in forensic pathology.

Purpose of the Study:

  • To assess the utility of MDCT-reconstructed dental images for postmortem age estimation.
  • To investigate the correlation between pulp cavity volume and age at death.

Main Methods:

  • Analysis of 136 mandibular first premolars from individuals with known age at death.
  • Determination of pulp cavity and whole tooth volumes using voxel counting on MDCT images.
  • Distinguishing dental hard tissue from pulp cavity using a 1400 Hounsfield unit threshold.

Main Results:

  • Pulp cavities were clearly visualized and quantifiable on MDCT-derived images.
  • A significant correlation (r = 0.76) was found between age at death and the pulp cavity to tooth volume ratio, adjusted for sex.
  • The pulp cavity to tooth volume ratio emerged as a reliable indicator for age prediction.

Conclusions:

  • MDCT imaging of teeth offers a practical and effective method for forensic age estimation.
  • The pulp cavity to tooth volume ratio derived from MDCT is a valuable parameter for postmortem identification.
  • This technique complements existing forensic identification methods by providing age-at-death data.