长骨的碎片化特征是由于不同尺寸的弹药的冲击而产生的
Julia McGowan1, James T Pokines1,2
1Forensic Anthropology Program, Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts, USA.
Journal of forensic sciences
|August 9, 2025
概括
这项研究比较了来自9毫米手枪和5.56毫米步枪弹药的长骨折. 虽然5.56mm造成了更多的碎片化,但断裂模式对于识别弹药类型是不可靠的.
科学领域:
- 法医科学 法医科学 法医科学
- 弹道学 弹道学 弹道学
- 创伤分析 创伤分析
背景情况:
- 枪支暴力和相关的长骨骨折正在增加.
- 关于枪伤 (GSW) 骨折模式的研究通常集中在骨或胸骨上,因为它们与致命伤害有关.
- 在了解GSW骨折特征,特别是长骨上的骨折方面存在差距.
研究的目的:
- 为了研究和比较两种不同的弹药类型的长骨上的碎片和创伤特征:9毫米手枪和5.56毫米突击步枪.
- 为了确定断裂模式的差异是否可以可靠地归因于特定的弹药口径及其能量转移.
主要方法:
- 使用了50只白尾鹿 (Odocoileus virginianus) 的小腿骨,用10%弹性凝包裹.
- 弹药 (9mm和5.56mm) 从大约2.74米的距离发射.
- 分析了断裂模式和碎片化特征,并使用曼-惠特尼U测试和Chi平方测试对两种弹药类型进行了统计比较.
主要成果:
- 与9毫米弹药相比,5.56毫米弹药导致骨碎片明显增加 (p=0.002).
- 在9mm样本 (48%) 中,假蝶骨折的发生率高于5.56mm样本 (4%).
- 大多数骨折特征都显示出与弹药类型的统计关联,除了阶段性突破骨折.
结论:
- 在受到9毫米和5.56毫米弹药冲击的长骨的弹道特性和碎片化模式上存在显著差异.
- 尽管观察到差异,但该研究得出的结论是,由于模式相似,仅仅对骨折模式分析是不建议的,以最终分类弹药类型.
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