LABANOF, Laboratorio di Antropologia e Odontologia Forense, Sezione di Medicina Legale, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milan, Italy.
Forensic Sci Int. 2012 Nov 30;223(1-3):87-90. doi: 10.1016/j.forsciint.2012.08.007. Epub 2012 Sep 16.
Previous studies have indicated that metal particles remain on bone after sharp force injury or gunshot and that their detection by scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDS) could greatly help in tool identification. However, the presence of metal particles on bone surfaces in the context of blunt force trauma has never been assessed experimentally. For this reason the present paper represents an experimental study of the behaviour of metal residues on bone following blunt force injury. Ten fresh sub-adult bovine metatarsal bones were manually cleaned of soft tissues. They were then struck by metal bars (copper, iron or aluminium) on the external surface of the mid-diaphysis. All blunt metal instruments used in this study left a sign in the form of single particles, a smear or a powder-like deposit on the bone surface. The residues of all three metal implements were detected on the bone surface, 0.3-10 mm from the fracture border. The presence of metal particles was confirmed in all samples struck with iron and copper and in two of six aluminium samples; no particles were detected on the negative control. Chemical composition of residues highly corresponded with the composition of applied bars.
先前的研究表明，在锐器伤或枪击伤后，金属颗粒会残留在骨头上，扫描电子显微镜与能量色散 X 射线光谱（SEM-EDS）的检测可以极大地帮助工具识别。然而，在钝器伤的情况下，骨表面上是否存在金属颗粒从未经过实验评估。出于这个原因，本文代表了对钝力损伤后骨上金属残留行为的实验研究。十个新鲜的未成年牛跖骨被手动清除软组织。然后，在中轴骨的外部表面用金属棒（铜、铁或铝）击打。本研究中使用的所有钝金属仪器在骨表面上留下了一个单一颗粒的痕迹，或者是一种呈粉末状的沉积物。在距骨折边界 0.3-10 毫米的骨表面上，检测到所有三种金属工具的残留物。在所有用铁和铜击打以及六个铝样本中的两个样本中都确认存在金属颗粒；在阴性对照样本中未检测到颗粒。残留物的化学成分与应用棒的化学成分高度相符。
