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Regarding loads after spinal fusion, every level should be seen separately: a musculoskeletal analysis

  • The number of spinal fusion surgeries is steadily increasing and biomechanical consequences are still in debate. The aim of this study is to provide biomechanical insights into the sagittal balance of the spine and to compare spinal load before and after spinal fusion. METHOD: The joint reaction forces of 52 patients were analyzed in proximo-distal and antero-posterior direction from the levels T12-L1 to L5-S1 using musculoskeletal simulations. RESULTS: In 104 simulations, pre-surgical forces were equal to post-surgical. The levels L4-L5 and T12-L1, however, showed increased spinal forces compression forces with higher sagittal displacement. Improved restauration of sagittal balance was accompanied by lower spinal load. AP shear stress, interestingly decreased with sagittal imbalance. CONCLUSION: Imbalanced spines have a risk of increased compression forces at Th12-L1. L4-L5 always has increased spinal loads. These slides can be retrieved under Electronic Supplementary Material.

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Metadaten
Author:Achim Benditz, Simon AuerORCiD, J.F. Spörrer, S. Wolkerstorfer, Joachim GrifkaORCiD, Franz Süß, Sebastian DendorferORCiD
DOI:https://doi.org/10.1007/s00586-018-5476-5
Parent Title (English):European Spine Journal
Publisher:Springer-Verlag
Document Type:Article
Language:English
Year of first Publication:2018
Release Date:2020/04/27
Tag:AnyBody Modeling System; Musculoskeletal analysis; Sagittal balance; Spinal fusion; Spine biomechanics
GND Keyword:Biomechanische Analyse; Wirbelsäulenversteifung; Vergleichende Anatomie
Volume:27
Issue:8
First Page:1905
Last Page:1910
Institutes:Fakultät Maschinenbau
Regensburg Center of Biomedical Engineering - RCBE
Fakultät Maschinenbau / Labor Biomechanik (LBM)
research focus:Lebenswissenschaften und Ethik