Karimi Mohammad Taghi, Rabczuk Timon, Pourabbas Babak
Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
Bone and Joint Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
Spine Deform. 2020 Jun;8(3):361-367. doi: 10.1007/s43390-020-00072-x. Epub 2020 Feb 17.
The efficiency of the braces designed for scoliotic subjects depends on configurations and also magnitudes of the forces used to stabilize and correct scoliotic curve. However, the effects of various force configurations on the spinal curves in sagittal plane should also be considered. The aim of this study was to determine the efficiency of various force configurations on scoliotic, lordotic and kyphotic curves.
A 3d model of spine was developed based on CT scan images of spine obtained from a scoliotic girl. The model was exported to Abaqus software to check the effects of various force configurations and magnitudes on spinal curves. The spinal curves in thoracic and lumbar, lordotic and kyphotic curves were evaluated in this study. Transverse forces, vertical forces and combination of transverse and vertical forces were selected in this study.
The results of this study showed that use of transverse forces did not influence the scoliotic curve significantly. Vertical directed forces not only decreased scoliotic curves but also decreased lordotic and kyphotic curves. It seems that a combination of both transverse and vertical directed forces decreased scoliotic curves but did not influence spinal curves in sagittal plane.
It is recommended to use a combination of transverse and vertical forces to decrease scoliotic curve without significant side effects on the spinal curves in sagittal plane. As this is a case study the outputs of the study should be used with caution.
为脊柱侧弯患者设计的支具的有效性取决于其结构以及用于稳定和矫正脊柱侧弯曲线的力的大小。然而，各种力的结构对矢状面脊柱曲线的影响也应予以考虑。本研究的目的是确定各种力的结构对脊柱侧弯、前凸和后凸曲线的有效性。
基于从一名脊柱侧弯女孩获取的脊柱CT扫描图像建立了脊柱的三维模型。将该模型导入Abaqus软件，以检查各种力的结构和大小对脊柱曲线的影响。本研究评估了胸腰段的脊柱曲线、前凸和后凸曲线。本研究选择了横向力、垂直力以及横向和垂直力的组合。
本研究结果表明，使用横向力对脊柱侧弯曲线没有显著影响。垂直方向的力不仅减小了脊柱侧弯曲线，还减小了前凸和后凸曲线。横向和垂直方向的力的组合似乎减小了脊柱侧弯曲线，但对矢状面的脊柱曲线没有影响。
建议使用横向和垂直力的组合来减小脊柱侧弯曲线，同时对矢状面的脊柱曲线没有明显的副作用。由于这是一个案例研究，本研究的结果应谨慎使用。
