Julius Wolff Institute, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany.
J Biomech. 2013 Jul 26;46(11):1972-5. doi: 10.1016/j.jbiomech.2013.04.024. Epub 2013 May 29.
The purpose of this study was to determine the correlation between the back shape of the lumbar region and the spinal loads during activities performed in the sagittal plane. Measurements were performed in four subjects who had suffered from a compression fracture of a lumbar vertebral body which was treated with a telemeterized vertebral body replacement that is able to measure six load components in vivo. An Epionics SPINE measurement system was used to determine the lumbar lordosis angle. The relationship between the lordosis angle and the corresponding loads was quantified with the Spearman's rank correlation coefficient method. Measurements were performed during thirteen exercises in lying, standing or sitting. During upper body flexion, the force increased on average by approximately 285N and the lordosis angle decreased by 15°. The change of the force for elevating 30N in one hand was on average approximately 190N and for the lordosis angle 2°. Correlation coefficients greater than 0.6 were found for exercises that involved both large back shape and load changes, such as upper body flexion. A strong increase in spinal load can be associated with an increase or a decrease of the lordosis angle. Only for considerable changes of the lordosis angle in an upright body position was a strong correlation between lordosis angle and implant force found.
本研究旨在确定腰椎背部形状与矢状面活动中脊柱负荷之间的相关性。在四个因腰椎体压缩性骨折而接受遥测椎体置换治疗的受试者中进行了测量，该置换体能够在体内测量六个负荷分量。使用 Epionics SPINE 测量系统确定腰椎前凸角。使用 Spearman 秩相关系数法定量确定前凸角与相应负荷之间的关系。在卧位、站位或坐位进行了 13 项运动测量。在上身前屈时，力平均增加约 285N，前凸角减小 15°。单手举起 30N 时的力变化平均约为 190N，前凸角为 2°。发现与上身前屈等涉及较大背部形状和负荷变化的运动之间的相关系数大于 0.6。脊柱负荷的大幅增加可能与前凸角的增加或减少有关。仅在直立体位下前凸角发生较大变化时，才发现前凸角与植入物力之间存在较强的相关性。
