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Master Thesis

Étude physico-chimique de la dégradation par le feu de l'os alvéolaire et basal‎ : intérêt médico-légal

Abstract : Forensic odontology is a rapidly evolving field, the tooth contains specific features which makes it essential when it comes to identifying bodies. The alveolar and basal bones are two very vulnerable components of the jaw, whereas the teeth they support show a great durability. Carbonizing a bone will lead to color changes and rupture patterns, or even fractures, can occur. These alterations will depend on the temperature, the time of exposure to the heat and the thickness of the soft tissues on the bone's surface. However, it remains difficult to use biological indices as forensics indicators in the context of a carbonization. The purpose of this study is to analyze the alveolar and basal bones physicochemical behavior when submitted to heat radiations, using characterization tools such as the TGA. The following study is carried out in association with the Paris Prefecture Police and their Central Laboratory's fire department. Fifteen pig's heads were placed in three distinct fires, enabling us to analyze their degradation. The collected samples were then put in the TGA under temperatures going from 30 to 1000°C in an environment containing air and nitrogen. The loss mass of each bone was measured throughout the heat radiations, as were the amount of heat absorbed and released by the bone in previously defined conditions. The objective is to show that the bone can be one of the tools allowing us to determine the parameters and the conditions of a fire.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-01713525
Contributor : Christophe Coignard - Scd Paris Diderot <>
Submitted on : Tuesday, February 20, 2018 - 4:29:12 PM
Last modification on : Wednesday, April 1, 2020 - 10:50:03 PM
Long-term archiving on: : Monday, May 21, 2018 - 1:34:23 PM

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  • HAL Id : dumas-01713525, version 1

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Maud Dujon. Étude physico-chimique de la dégradation par le feu de l'os alvéolaire et basal‎ : intérêt médico-légal. Sciences du Vivant [q-bio]. 2017. ⟨dumas-01713525⟩

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