Sun Zhi-Feng, Yang Kai-Xiang, Chen Hong-Tao, Sui Tao, Yang Lei, Ge Da-Wei, Tang Jian, Cao Xiao-Jian
Department of Orthopaedics, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China.
J Biomed Res. 2018 Mar 26;32(2):123-129. doi: 10.7555/JBR.31.20160037.
This study was aimed to introduce a novel entry point for pedicle screw fixation in the thoracic spine and compare it with the traditional entry point. A novel entry point was found with the aim of improving accuracy, safety and stability of pedicle screw technique based on anatomical structures of the spine. A total of 76 pieces of normal thoracic CT images at the transverse plane and the thoracic pedicle anatomy of 6 cadaveric specimens were recruited. Transverse pedicle angle (TPA), screw length, screw placement accuracy rate and axial pullout strength of the two different entry point groups were compared. There were significant differences in the TPA, screw length, and the screw placement accuracy rate between the two groups (<0.05). The maximum axial pullout strength of the novel entry point group was slightly larger than that of the traditional group. However, the difference was not significant (>0.05). The novel entry point significantly improved the accuracy, stability and safety of pedicle screw placement. With reference to the advantages above, the new entry point can be used for spinal internal fixations in the thoracic spine.
本研究旨在介绍一种用于胸椎椎弓根螺钉固定的新入点，并将其与传统入点进行比较。基于脊柱的解剖结构，发现了一个新入点，旨在提高椎弓根螺钉技术的准确性、安全性和稳定性。共收集了76张正常胸椎横断面CT图像以及6具尸体标本的胸椎椎弓根解剖结构。比较了两种不同入点组的横椎弓根角（TPA）、螺钉长度、螺钉置入准确率和轴向拔出强度。两组之间的TPA、螺钉长度和螺钉置入准确率存在显著差异（<0.05）。新入点组的最大轴向拔出强度略大于传统组。然而，差异不显著（>0.05）。新入点显著提高了椎弓根螺钉置入的准确性、稳定性和安全性。鉴于上述优点，新入点可用于胸椎的脊柱内固定。
