Forensic Sci Med Pathol (2011) 7:53–62 55 Fig. 4 Hack saw blade kerf Fig. 6 Bow saw blade kerf Fig. 5 Bow saw blade then third, they were closed. When closed, the pointer setting returned to ‘‘0.’’ The thickness of the blade and the teeth are reported in Table 1. The saw kerf and teeth width characteristics are reported in Table 2. The width of the teeth on mechanical-powered saw and human-powered saws can be the same size as the blade or wider than the blade. The teeth on the blades from the human-powered saws ranged from 0.025 mm to .0457 mm in size while the teeth on the mechanical saws ranged from 0.025 mm to 0.762 mm in size. Ten saw types were used to cut kerfs into ten separate sections of bone. One saw type was used on each bone sec- tion to produce ten kerfs. Each kerf was examined with a stereoscopic boom microscope equipped with a digital camera and measuring software. Next, the digital camera measuring software was calibrated according to the Fig. 7 Molding cut-off blade manufacturer’s instructions using a calibration disk with a 7,500 lm black calibration circle that was supplied with the digital camera and measuring software. A magniﬁcation of 209 was selected to examine each of the kerfs. Five mea- surements were taken from each of the kerfs. The measure- ment data was then subjected to statistical analysis for comparison of saw kerf widths and saw blade thicknesses. Statistical analysis Two cumulative logit models using Statistical Analysis System (SAS) software were used to analyze the data in 123