Treatment of Thoracolumbar Fractures Through Different Short Segment Pedicle Screw Fixation Techniques: A Finite Element Analysis

Wang, Tienan; Wu, Baolin; Duan, Ruimeng; Yuan, Yashuai; Qu, Mingjia; Zhang, Shuo; Huang, Wei; Liu, Tao; Yu, Xiaobing

doi:10.1111/os.12643

Cited by 20 publications

(24 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We found that the site with the largest VMS in internal fixation was at the screw-rod connection site in all models, explaining why internal fixation is prone to failure at the screw-rod connection site. Similar findings were reported previously [ 21 – 23 ]. PUVCR showed slightly higher screw and rod stresses than VCR in all loading cases except in short-segment lateral bending.…”

Section: Discussionsupporting

confidence: 93%

Biomechanical finite element analysis of vertebral column resection and posterior unilateral vertebral resection and reconstruction osteotomy

Han

Wang

et al. 2021

J Orthop Surg Res

View full text Add to dashboard Cite

Background Regarding the repair of vertebral compression fractures, there is a lack of adequate biomechanical verification as to whether only half of the vertebral body and the upper and lower intervertebral discs affect spinal biomechanics; there also remains debate as to the appropriate length of fixation. Methods A model of old vertebral compression fractures with kyphosis was established based on CT data. Vertebral column resection (VCR) and posterior unilateral vertebral resection and reconstruction (PUVCR) were performed at T12; long- and short-segment fixation methods were applied, and we analyzed biomechanical changes after surgery. Results Range of motion (ROM) decreased in all fixed models, with lumbar VCR decreasing the most and short posterior unilateral vertebral resection and reconstruction (SPUVCR) decreasing the least; in the long posterior unilateral vertebral resection and reconstruction (LPUVCR) model, the internal fixation system produced the maximum VMS stress of 213.25 mPa in a lateral bending motion and minimum stress of 40.22 mPa in a lateral bending motion in the SVCR. Conclusion There was little difference in thoracolumbar ROM between PUVCR and VCR models, while thoracolumbar ROM was smaller in long-segment fixation than in short-segment fixation. In all models, the VMS was most significant at the screw-rod junction and greatest at the ribcage–vertebral body interface, partly explaining the high probability of internal fixation failure and prosthesis migration in these two positions.

show abstract

Section: Discussionsupporting

confidence: 93%

Biomechanical finite element analysis of vertebral column resection and posterior unilateral vertebral resection and reconstruction osteotomy

Han

Wang

et al. 2021

J Orthop Surg Res

View full text Add to dashboard Cite

show abstract

“…We found that the site with the largest VMS in internal xation was at the screw-rod connection site in all models, which explains why internal xation is prone to failure at the screw-rod connection site. Similar ndings were reported previously [21][22][23]. PUVCR showed slightly higher screw and rod stresses than VCR in all loading cases except in short segment lateral bending.…”

Section: Discussionsupporting

confidence: 91%

Treatment of Old Vertebral Compression Fracture With Kyphosis by Different Reconstruction Methods: a Finite Element Analysis

Han¹,

Wang²,

Wu³

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: In repair of vertebral compression fractures, there is a lack of effective biomechanical verification as to whether only half of the vertebral body and the upper and lower intervertebral discs has any effect on spinal biomechanics; there also remains debate as to the appropriate length of fixation.Methods: A model of old vertebral compression fractures with kyphosis was established based on CT data. Vertebral column resection (VCR) and posterior unilateral vertebral resection and reconstruction (PUVCR) were performed at T12; long- and short-segment fixation methods were applied, and we analyzed biomechanical changes after surgery.Results: Range of motion (ROM) decreased in all fixed models, with lumbar VCR decreasing the most and short posterior unilateral vertebral resection and reconstruction (SPUVCR) decreasing the least; in the long posterior unilateral vertebral resection and reconstruction (LPUVCR) model, the internal fixation system produced the maximum VMS stress of 213.25 MPa in a lateral bending motion, and a minimum stress of 40.22 MPa in a lateral bending motion in the SVCR.Conclusion: There was little difference in thoracolumbar ROM between PUVCR and VCR models, while thoracolumbar ROM was smaller in long-segment fixation than in short-segment fixation. In all models, the VMS was greatest at the screw-rod junction and greatest at the ribcage–vertebral body interface, which partly explains the high probability of internal fixation failure and prosthesis migration in these two positions.

show abstract

“…However, the results of each study were inconsistent, so the difference between CBT screw implantation and traditional pedicle screws was still worth discussing. A finite element analysis model of a CBT screw combined with a traditional pedicle screw was also established [19]. The biomechanical evaluation was compared with the CBT screw system, traditional pedicle screw system, and universal spine system.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical Evaluation of Cortical Bone Trajectory Fixation with Traditional Pedicle Screw in the Lumbar Spine: A Finite Element Study

Chen

Pan

et al. 2021

Applied Sciences

View full text Add to dashboard Cite

Cortical bone trajectory (CBT) is increasingly used in spinal surgery. Although there are many biomechanical studies, the biomechanical effect of CBT in combination with traditional pedicle screws is not detailed. Therefore, the purpose of this study was to investigate the effects of the traditional pedicle screw and CBT screw implantation on the lumbar spine using finite element methods. Based on the combination of the traditional pedicle screw and the CBT system implanted into the lumbar spine, four finite element spinal lumbar models were established. The models were given four different load conditions (flexion, extension, lateral bending, and axial rotation), and the deformation and stress distribution on the finite element model were observed. The results show that there was no significant difference in the structural stability of the lumbar spine model between the traditional pedicle screw system and the CBT system. In addition, CBT may reduce stress on the endplate. Different movements performed by the model may have significant biomechanical effects on the spine and screw system. Clinical spinal surgeons may also consider using the CBT system in revision spinal surgery, which may contribute to smaller wounds.

show abstract

Treatment of Thoracolumbar Fractures Through Different Short Segment Pedicle Screw Fixation Techniques: A Finite Element Analysis

Cited by 20 publications

References 25 publications

Biomechanical finite element analysis of vertebral column resection and posterior unilateral vertebral resection and reconstruction osteotomy

Biomechanical finite element analysis of vertebral column resection and posterior unilateral vertebral resection and reconstruction osteotomy

Treatment of Old Vertebral Compression Fracture With Kyphosis by Different Reconstruction Methods: a Finite Element Analysis

Biomechanical Evaluation of Cortical Bone Trajectory Fixation with Traditional Pedicle Screw in the Lumbar Spine: A Finite Element Study

Contact Info

Product

Resources

About