Reliability and Analysis of Changes in Bite Marks at Different Time Intervals and Temperature Ranges

Abstract

clay, and rubber. Photographs were taken with a digital camera at 0-hours and 24-hours after biting these objects at temperature ranges of 24 ºC to 28 ºC and 36 ºC to 40 ºC, respectively. Life-size photographs of these bitten objects were printed on transparent overlays and compared to hand drawn transparencies prepared from suspect dentition using an X-ray viewer.The comparison of all the 960 transparencies was done by two researchers, independently.All objects gave a positive identification of the biter on matching just after biting. After 24-hours, all items also showed positive matching except banana and apples. This proposed method is simple, reliable and less technique sensitive. It narrows down the subjectivity of interpretation. It highlights that due to decomposition changes occur in perishable food items and more so in apples and bananas, making bite marks less reliable evidence. ‫فرتات‬ ‫على‬ ‫الع�ض‬ ‫عالمات‬ ‫يف‬ ‫التغريات‬ ‫وحتليل‬ ‫موثوقية‬ AbstractThe purpose of this study is to assess time-dependent changes in the morphology of bite marks and to investigate the utility of matching bite marks on both perishable and non-perishable objects with the passage of time at different temperatures.The study was conducted at Maharana Pratap College of Dentistry and Research Centre, Gwalior, India.Twenty volunteers were asked to bite 6 perishable and non-perishable items. Perishable items were apple, banana and Burfi, (a milk-based popular sweet confectionary) while non-perishable items included wax,