Tri-dimensional pattern analysis of foodstuff bitemarks - A pilot study of tomographic database

Forensic Science International : Synergy
Ana Teresa Corte-RealDuarte Nuno Vieira

Abstract

The analysis of bitemarks has been mostly done through analogical methods. The advent of current technologies brings new and more reliable tools for analyzing evidence. Bitemarks can now be turned into more consistent evidence by using a digital tridimensional (3D) analysis. The aim of this study is to propose a reliable, accurate and monitorized approach of 3D bitemark analysis. 12 cranium Cone Beam Computed Tomographic (CBCT) files were randomly selected from a clinical database (Coimbra Hospital and University Center/Faculty of Medicine of the University of Coimbra). The individuals were recalled to bite an apple (golden delicious 65/80) immediately subjected to a CBCT scan. The 3D rendering of every bitemark was compared with the 3D upper dental arches obtained from the CBCT cranium scans of the simulated suspects. The research team was composed by 5 elements. The matching process consists of corresponding landmark points, in both the bitemark and the suspects' dentition (upper dental arch). 144 comparisons were obtained. The Kappa statistics analysis was performed. Cohen's Kappa values were obtained between 0,690 and 0,910. Fleiss Kappa obtained a value of 0,767. The Friedman's test was performed and the normality assumpti...Continue Reading

Citations

Feb 25, 2020·Forensic Science International : Synergy·G FournierD Maret

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