Bite marks: evaluation of the use of cyanocrilate glue in a simulated expert case.

Abstract

Bite marks are injuries that contribute to the identification of aggressors, victims and criminals, having probative value in lawsuits, because they present peculiar characteristics of each individual and they can also be found in food at crime scenes, having great value for legal dentistry. A patient under regular treatment was selected at the Complexo Odontológico da FSG Centro Universitário, who was invited to participate in the study by signing the informed consent form. This study was approved by the CEP, CAEE 34264720.3.0000.5668. The patient's upper and lower arches were molded to make a plaster model, and he was also asked to chew a chewing gum for 5 minutes and afterwards, cyanocrylate-based glue was used on the gum for dimensional stabilization. The molding material used was the addition silicone, both for the arcade models and for gum duplication. For the verification of dimensional alteration, it was used the Metric Analysis with dry-point compass and digital pachymeter, measuring the cusps tips. For the comparison, photos of the plaster models (chewing gum and upper and lower arches) were taken with a 12MP (1334 x 750 pixel) camera and manual overlay, with transparent acetate sheet, using overhead projector pen. In the present study it was possible to conclude that, with the use of cyanotrilate based glue, the chewing gum did not have dimensional changes in the measured points.