Cross-link is a risk factor for rod fracture at pedicle subtraction osteotomy site

A finite element study

Tae Hyun Park, Su Heon Woo, Sung Jae Lee, Dong Min Sohn, Chun Kee Chung, Yongjung Jay Kim, Seil Sohn

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Background: We aim to investigate using finite element model (FEM) whether the use of a cross-link is a risk factor for rod fracture at the pedicle subtraction osteotomy (PSO) site. Methods: The geometry and dimensions of the FEM were obtained from a high-resolution computed tomography scan data of a 65 years old female patient with spinal sagittal imbalance. The intact model was modified to place PSO on the L4 spine. A cross-link was placed at the PSO site. A multisegment spinal fusion model from L1 to the pelvis was used to compare and analyze the peak von Mises stress (PVMS) values of the implants. A compressive follower load of 400 N was added to the validated intact lumbar spinal model in the follower load path direction. Results: After PSO surgery, the PVMS of the rod was significantly increased during flexion and extension at the PSO site. With the cross-link at the PSO site, the PVMS of the rod was further significantly increased during flexion and extension. Conclusion: The cross-link at the PSO site increased the risk of rod facture, especially during flexion and extension stress.

Original languageEnglish
Pages (from-to)246-250
Number of pages5
JournalJournal of Clinical Neuroscience
Volume66
DOIs
StatePublished - 1 Aug 2019

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Osteotomy
Spinal Fusion
Pelvis
Spine
Tomography

Keywords

  • Cross-link
  • Finite element analysis
  • PSO
  • Rod fracture
  • Spine

Cite this

Park, Tae Hyun ; Woo, Su Heon ; Lee, Sung Jae ; Sohn, Dong Min ; Chung, Chun Kee ; Kim, Yongjung Jay ; Sohn, Seil. / Cross-link is a risk factor for rod fracture at pedicle subtraction osteotomy site : A finite element study. In: Journal of Clinical Neuroscience. 2019 ; Vol. 66. pp. 246-250.
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abstract = "Background: We aim to investigate using finite element model (FEM) whether the use of a cross-link is a risk factor for rod fracture at the pedicle subtraction osteotomy (PSO) site. Methods: The geometry and dimensions of the FEM were obtained from a high-resolution computed tomography scan data of a 65 years old female patient with spinal sagittal imbalance. The intact model was modified to place PSO on the L4 spine. A cross-link was placed at the PSO site. A multisegment spinal fusion model from L1 to the pelvis was used to compare and analyze the peak von Mises stress (PVMS) values of the implants. A compressive follower load of 400 N was added to the validated intact lumbar spinal model in the follower load path direction. Results: After PSO surgery, the PVMS of the rod was significantly increased during flexion and extension at the PSO site. With the cross-link at the PSO site, the PVMS of the rod was further significantly increased during flexion and extension. Conclusion: The cross-link at the PSO site increased the risk of rod facture, especially during flexion and extension stress.",
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Cross-link is a risk factor for rod fracture at pedicle subtraction osteotomy site : A finite element study. / Park, Tae Hyun; Woo, Su Heon; Lee, Sung Jae; Sohn, Dong Min; Chung, Chun Kee; Kim, Yongjung Jay; Sohn, Seil.

In: Journal of Clinical Neuroscience, Vol. 66, 01.08.2019, p. 246-250.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Park, Tae Hyun

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AU - Sohn, Dong Min

AU - Chung, Chun Kee

AU - Kim, Yongjung Jay

AU - Sohn, Seil

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