Biomechanical evaluation of different posterior fixation techniques for treating thoracolumbar burst fractures of osteoporosis old patients: a finite element analysis

• DOI: 10.3389/fbioe.2023.1268557
• Publication Date: 2023-11-01T17:41:42Z
• Authors: Guodong Zhang; Yukun Du; Guangzong Jiang; Weiqing Kong; Jianyi Li; Zhongjiao Zhu; Yongming Xi
• Keywords: Burst fracture; Biomechanics; Thoracic vertebrae

Objective: To investigate the biomechanical characteristics of different posterior fixation techniques in treatment osteoporotic thoracolumbar burst fractures by finite element analysis. Methods: The Dicom format images T10-L5 segments were obtained from CT scanning a volunteer, and transferred to Geomagic Studio software, which was used build digital models. L1 fracture simulated SolidWorks software. data ROM, maximum displacement fixed segment, ROM fractured vertebrae, stress on screws rods as well vertebrae under movement conditions collected analysed Results: Among four groups, largest segment occurred CBT, corresponding 1.3°, 2.57 mm 1.37°, respectively. While smallest found LSPS, 0.92°, 2.46 0.89°, 390.97 Mpa, appeared 84.68 MPa, LSPS. concentrated at junction area between root rods. 93.25 CBT minimum 56.68 CAPS. And middle column especially edge superior endplate. Conclusion: In this study, long-segment (LSPF) provided with greatest stability after fixation, while cortical bone screw (CBT) stability. Cement-augmented pedicle screw-rod (CAPS) combined using (CBT-PS) moderate CBT-PS exhibited superiority resistance rotational torsion for multiple connecting CAPS maybe biomechanically options surgical TL patients.