Analysis of Intercanine Distance and Dimensional Changes in Bite Marks on Foodstuffs Using Cone Beam Computed Tomography

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Abstract

Bite marks on foodstuff at the crime scene provide a 3-dimensional imprint of the suspect's dentition. The bite mark analysis can provide useful evidences, leading to the inclusion or exclusion of the individual under investigation. This study was designed to assess bite marks on various common foodstuffs (chocolate, apple, chewing gum, cheese) for different time intervals using cone beam computed tomography (CBCT) to evaluate the dimensional changes in the foodstuffs. Analysis of variance test was used to compare the bite marks measured using CBCT in maxillary and mandibular arches with significance set at P < 0.05. The results show that teeth can transfer their characteristics to the bitten foodstuffs. The highest accuracy for comparative bite mark analysis was observed in chocolate followed by cheese, chewing gum, and apple. The CBCT-assisted analysis of bite marks is a nondestructive, accurate, and efficient method. The CBCT documentation has no distortion artifacts, and subsequent analysis in 3-dimensional space is possible.

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