6軸材料試験機を用いた脊椎変形挙動の実験的解明 : 第1報,脊椎強度測定用試験機の開発

概要

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In order to evaluate the influence of injury to the intervertebral disc, supraspinal ligament, interspinal ligament, and facet joint on the spinal deformation, we conducted a bending test in a total of 8 directions and a torsional test using the 6-axis material testing machine we developed for this study. The study closely investigated changes in the range of motion (ROM) of the functional spinal unit (FSU) associated with injury using a FSU of the lumbar spines obtained from human cadavers. The results of the bending test showed that when the intervertebral disc was injured, the ROM increased equally in all directions. When the supraspinal ligament and interspinal ligament were injured, the ROM increased only in the flextion. When the facet joint was injured, the ROM increased in the flexion and extension. The results of the torsional test showed that when the facet joint was injured, the ROM increased remarkably. Furthermore, the coupled motion to lateral direction was recognized in the models with the facet joint.
社団法人日本機械学会の論文
2008-04-25