乳猪肢体牙痕损伤处的生物力学研究  

A Research in Biomechanics of Bite Marks on Porker Limb

作　　者：吴珺华[1] 陈新民[2] 刘伟才[1] 黄承敏[1] 

机构地区：[1]同济大学口腔医院,上海200072 [2]四川大学华西口腔医学院,成都610041

出　　处：《生物医学工程学杂志》2009年第2期310-312,共3页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(30600720);上海市启明星计划资助项目(07QA14057)

摘　　要：通过建立不同载荷下乳猪肢体牙痕损伤模型,研究损伤处软组织生物力学参数的改变。利用万能试验机测试牙痕形成的软组织压缩应力-应变曲线及损伤处皮肤的拉伸性能,利用自制软组织压痕计测试不同时间段损伤处软组织弹性的变化。结果显示牙痕损伤处软组织与正常对照组相比力学性能下降;且随着损伤载荷的加大,下降趋势明显,其中软组织弹性在损伤后1h内有较大程度的回复,而后随时间的延长弹性下降。This research was designed to illuminate the change in biomechanical parameters of soft tissue for bite marks on porker limb. The authors used a prefabricate nob to press perpendicularly on porket limb and so to establish bite mark under three forces： 100N, 200N and 300N. After the procedure of biting, the stress-strain relation- ship and changes in extension of soft tissue were recorded. Meanwhile, the elasticity was measured with a press meter at nine time-points. When bite mark was formed, with the development of stress, the strain of soft tissue increased. But the speed of increment slowed down when stress exceeded some extent. After bite mark was formed, the extension and elasticity of soft tissue decreased with the increase of pressure.

关 键 词：咬痕 牙痕 弹性 应力 应变 

分 类 号：R318.01[医药卫生—生物医学工程]