Yu Yifeng, Li Wenjing, Yu Lingjia, Qu Hao, Niu Tong, Zhao Yu
Department of Orthopaedics, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Department of Orthopaedics, Beijing Jishuitan Hospital, Beijing, China.
J Orthop Translat. 2020 Jan 9;21:35-40. doi: 10.1016/j.jot.2019.12.006. eCollection 2020 Mar.
To compare the biomechanical characteristics of two transforaminal thoracic interbody fusion cages based on the Chinese population thoracic anatomy.
Computed tomography scans of the thoracic spine of 150 patients from our institution were collected and analysed. Two cages were designed based on the anatomical parameters of these patients. Further, we used 3D finite element analysis models to compare the stability of two cages by using Mimics 17.0 and ANSYS 15.0 software.
Two kinds of thoracic cages (box and kidney-shaped) were designed. Under the displacement working condition, the two new fusion cages could achieve immediate postoperative stability, but the kidney-shaped cage was better than the box-shaped cage. Under the stress working condition, no highly focused stress area was found in either cages, but the kidney-shaped cage experienced less stress than the box-shaped cage.
The kidney-shaped cage is more stable and experiences lesser stress than the box-shaped cage after thoracic intervertebral fusion, and it is more suitable for Chinese transforaminal thoracic interbody fusion.
This article is about thoracic fusion cage design and finite element analysis (FEA) analysis based on the thoracic anatomy parameters. For there is currently no suitable thoracic fusion cage for transforaminal thoracic interbody fusion, the results in this article may have the potential of transferring the two designed cages into clinical use.
基于中国人群的胸椎解剖结构，比较两种经椎间孔胸椎椎间融合器的生物力学特性。
收集并分析了来自本机构的150例患者的胸椎计算机断层扫描图像。根据这些患者的解剖学参数设计了两种融合器。此外，我们使用Mimics 17.0和ANSYS 15.0软件的三维有限元分析模型来比较两种融合器的稳定性。
设计了两种胸椎融合器（盒形和肾形）。在位移工况下，两种新型融合器均可实现术后即刻稳定，但肾形融合器优于盒形融合器。在应力工况下，两种融合器均未发现高应力集中区域，但肾形融合器的应力小于盒形融合器。
肾形融合器在胸椎椎间融合术后比盒形融合器更稳定，应力更小，更适合中国人的经椎间孔胸椎椎间融合。
本文是关于基于胸椎解剖参数的胸椎融合器设计和有限元分析。由于目前尚无适用于经椎间孔胸椎椎间融合的胸椎融合器，本文的结果可能具有将两种设计的融合器转化为临床应用的潜力。
