Neumann P, Osvalder A L, Nordwall A, Lövsund P, Hansson T
Department of Orthopaedics, University of Göteborg, Sahlgren Hospital, Sweden.
J Spinal Disord. 1993 Aug;6(4):314-23. doi: 10.1097/00002517-199306040-00005.
Flexion-distraction injuries (lap seat-belt injuries resulting from car accidents) were simulated by exposing 16 lumbar functional spinal units (FSUs) to a combined quasistatic load of bending and shearing in the sagittal plane. The load response of the FSU was measured by means of a force and moment transducer. Displacements and angulations were measured and calculated by means of dial gauges and photographs taken after each loading step. The mean angulation between the vertebrae just before total rupture was 20 degrees. The ultimate values of bending moment, shear force, and bending stiffness were correlated with the bone mineral content (BMC), and so were the horizontal and vertical displacements determined around the yield point on the load-displacement curve.
通过将16个腰椎功能脊柱单元（FSU）暴露于矢状面内弯曲和剪切的组合准静态载荷来模拟屈曲-牵张损伤（由汽车事故导致的膝部安全带损伤）。FSU的载荷响应通过力和力矩传感器进行测量。位移和角度通过表盘式量规测量，并在每个加载步骤后拍摄照片进行计算。完全断裂前椎骨之间的平均角度为20度。弯矩、剪力和弯曲刚度的极限值与骨矿物质含量（BMC）相关，载荷-位移曲线上屈服点周围确定的水平和垂直位移也与骨矿物质含量相关。
