Decisive factor in increase of loading at adjacent segments after lumbar fusion: Operative technique, pedicle screws, or fusion itself. - Biomechanical analysis using finite element

Joon Hee Park, Ho Joong Kim, Kyoung Tak Kang, Ka Yeon Kim, Heoung Jae Chun, Seong Hwan Moon, Hwan Mo Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The aim of this study is to investigate the change in biomechanical milieu following removal of pedicle screws or removal of spinous process with posterior ligament complex in instrumented single level lumbar arthrodesis. We developed and validated a finite element model (FEM) of the intact lumbar spine (L2-4). Four scenarios of L3-4 lumbar fusion were simulated: posterolateral fusion (PLF) at L3-4 using pedicle screw system with preservation of PLC (Pp WiP), L3-4 lumbar posterolateral fusion state after removal of pedicle screw system with preservation of PLC (Pp WoP), L3-4 using pedicle screw system without preservation PLC (Sp WiP), L3-4 lumbar posterolateral fusion state after removal of pedicle screw system without preservation of PLC (Sp WoP). For these models, we investigated the range of motion and maximal Von mises stress of disc in all segments under various moments. All fusion models demonstrated increase in range of motion at adjacent segments compared to the intact model. For the four fusion models, the WiP model s P had the largest increase in range of motion at each adjacent segment. This study demonstrated that removal of pedicle screw system and preservation of PLC after complete lumbar spinal fusion could reduce the stress of adjacent segments synergistically and might have beneficial effects in preventing ASD.

Original languageEnglish
Title of host publicationFourth International Conference on Experimental Mechanics
DOIs
Publication statusPublished - 2010 Dec 1
Event4th International Conference on Experimental Mechanics - Singapore, Singapore
Duration: 2009 Nov 182009 Nov 20

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7522
ISSN (Print)0277-786X

Other

Other4th International Conference on Experimental Mechanics
CountrySingapore
CitySingapore
Period09/11/1809/11/20

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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    Park, J. H., Kim, H. J., Kang, K. T., Kim, K. Y., Chun, H. J., Moon, S. H., & Lee, H. M. (2010). Decisive factor in increase of loading at adjacent segments after lumbar fusion: Operative technique, pedicle screws, or fusion itself. - Biomechanical analysis using finite element. In Fourth International Conference on Experimental Mechanics [75222R] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7522). https://doi.org/10.1117/12.851295