Ultra-high-resolution dual-source CT for forensic dental visualization-discrimination of ceramic and composite fillings

Jackowski, C; Wyss, M; Persson, A; Classens, M; Thali, M J; Lussi, A (2008). Ultra-high-resolution dual-source CT for forensic dental visualization-discrimination of ceramic and composite fillings. International journal of legal medicine, 122(4), pp. 301-7. Heidelberg: Springer-Verlag 10.1007/s00414-008-0224-8

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Dental identification is the most valuable method to identify human remains in single cases with major postmortem alterations as well as in mass casualties because of its practicability and demanding reliability. Computed tomography (CT) has been investigated as a supportive tool for forensic identification and has proven to be valuable. It can also scan the dentition of a deceased within minutes. In the present study, we investigated currently used restorative materials using ultra-high-resolution dual-source CT and the extended CT scale for the purpose of a color-encoded, in scale, and artifact-free visualization in 3D volume rendering. In 122 human molars, 220 cavities with 2-, 3-, 4- and 5-mm diameter were prepared. With presently used filling materials (different composites, temporary filling materials, ceramic, and liner), these cavities were restored in six teeth for each material and cavity size (exception amalgam n = 1). The teeth were CT scanned and images reconstructed using an extended CT scale. Filling materials were analyzed in terms of resulting Hounsfield units (HU) and filling size representation within the images. Varying restorative materials showed distinctively differing radiopacities allowing for CT-data-based discrimination. Particularly, ceramic and composite fillings could be differentiated. The HU values were used to generate an updated volume-rendering preset for postmortem extended CT scale data of the dentition to easily visualize the position of restorations, the shape (in scale), and the material used which is color encoded in 3D. The results provide the scientific background for the application of 3D volume rendering to visualize the human dentition for forensic identification purposes.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute of Legal Medicine > Management
04 Faculty of Medicine > Service Sector > Institute of Legal Medicine
04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry

UniBE Contributor:

Jackowski, Christian; Thali, Michael and Lussi, Adrian

ISSN:

0937-9827

Publisher:

Springer-Verlag

Language:

English

Submitter:

Eveline Carmen Schuler

Date Deposited:

04 Oct 2013 15:02

Last Modified:

26 Jun 2018 14:59

Publisher DOI:

10.1007/s00414-008-0224-8

PubMed ID:

18335233

Web of Science ID:

000256471700004

BORIS DOI:

10.7892/boris.26812

URI:

https://boris.unibe.ch/id/eprint/26812 (FactScience: 88803)

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