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首页> 外文期刊>Journal of Biomechanics >Biomechanical response of the human mandible to impacts of the chin.
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Biomechanical response of the human mandible to impacts of the chin.

机译：下颌骨对下颌的生物力学反应。

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摘要

The purpose of this study was to determine the force-time and force-displacement response of the human mandible under direct loading at the chin. Sub-fracture response of the mandible and temporomandibular joint (TMJ) were analyzed from 10 cadavers that were impacted at the chin with a 2.8-kg mass at drop heights of 300, 400 and 500 mm and a 5.2-kg mass at 500 mm. Motion of radio-opaque markers adhered to the surface of the bone was recorded at 1000 Hz by a bi-planar X-ray and converted to three-dimensional coordinates. Peak force ranged from 0.90 to 4.54 kN causing chin displacement of 1.2-4.4 mm. A bi-linear response was observed with stiffness of 475.1+/-199.8 kN/m for chin displacement resulting from loading up to 0.6 kN and 2381.6+/-495.7 kN/m for loads from 0.6 to 3.25 kN. This defines the biomechanical response of the mandible for chin motion under impact loading. The response of different segments of the mandible and TMJ are also documented. Force-time and force-displacement response corridors for the mandible can be used for finite element model and/or the development and validation of a biomechanical surrogate.
机译：这项研究的目的是确定下颌直接受力时下颌骨的受力时间和受力位移响应。分析了10个尸体的下颌骨和颞下颌关节（TMJ）的亚骨折响应，这些尸体在下巴受到冲击，其下沉高度为2.8 kg，下落高度为300、400和500 mm，下沉高度为5.2 kg，在500 mm处。通过双平面X射线以1000Hz记录附着于骨表面的不透射线的标记物的运动，并将其转换为三维坐标。峰值力范围为0.90至4.54 kN，导致下巴位移为1.2-4.4 mm。对于下巴位移，观察到双线性响应，其刚度为475.1 +/- 199.8 kN / m，这是由于载荷高达0.6 kN而产生的，刚度为2381.6 +/- 495.7 kN / m，载荷为0.6至3.25 kN。这定义了下颌在冲击载荷下下巴运动的生物力学响应。还记录了下颌骨和TMJ不同部分的反应。下颌骨的受力时间和受力位移响应通道可用于有限元模型和/或生物力学替代物的开发和验证。

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