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  • Three Dimensional Superimposition of Dentition Isosurfaces for Personal Identification in Forensic Odontology

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    102052_1.pdf (372.2Kb)
    Author(s)
    Forrest, Alex Stewart
    MacGregor, Donna
    Barry, Mark
    Meredith, Matt
    Griffith University Author(s)
    Forrest, Alex S.
    Year published
    2014
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    Abstract
    It is well documented that many Australians have few or no dental restorations. Unfortunately it is not uncommon to see such individuals in the mortuary where, often because of disfigurement caused by trauma, they undergo identification by Forensic Odontology. Forensic Odontologists are less enthusiastic to declare that a person has been identified beyond doubt on the basis of comparing anatomy of teeth and bones than they are when comparing the distinctive morphology of radiopaque dental restorations visible in dental radiographs. A method of increasing the degree of confidence in the match is available when ante-mortem ...
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    It is well documented that many Australians have few or no dental restorations. Unfortunately it is not uncommon to see such individuals in the mortuary where, often because of disfigurement caused by trauma, they undergo identification by Forensic Odontology. Forensic Odontologists are less enthusiastic to declare that a person has been identified beyond doubt on the basis of comparing anatomy of teeth and bones than they are when comparing the distinctive morphology of radiopaque dental restorations visible in dental radiographs. A method of increasing the degree of confidence in the match is available when ante-mortem dental study casts or cone-beam CT scans of the dentition of a suspected deceased are available. In such cases, a CT scan or a three-dimensional laser scan of the dentition of the deceased can be obtained, and isosurfaces can be created from each of the two sources (postmortem and antemortem). These can then be superimposed in three dimensions and the degree to which the surfaces match can be expressed by the use of colour to indicate increasing levels of match or mismatch. The process will be illustrated and its strengths and limitations discussed.
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    Conference Title
    22nd International Symposium on the Forensic Sciences of the Australian and New Zealand Forensic Science Society
    Publisher URI
    http://www.aomevents.com/ANZFSS2014
    Copyright Statement
    © The Author(s) 2014. The attached file is reproduced here in accordance with the copyright policy of the publisher. For information about this conference please refer to the conference’s website or contact the authors.
    Subject
    Dentistry not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/68267
    Collection
    • Conference outputs

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