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http://dx.doi.org/10.7234/composres.2021.34.3.186

Comparative Analysis of Biomechanical Behaviors on Lumbar with Titanium and Carbon Fiber Reinforced PEEK Connecting Rods for Fusion Surgery  

Seo, Hye-Sung (Department of Mechanical Engineering, Yonsei University)
Kang, Hae-Seong (Department of Mechanical Engineering, Yonsei University)
Chun, Houng-Jae (Department of Mechanical Engineering, Yonsei University)
Publication Information
Composites Research / v.34, no.3, 2021 , pp. 186-191 More about this Journal
Abstract
The lumbar spinal fusion is a treatment performed to restore the stability of the degenerated lumbar. In this study, the intervertebral discs between two or more segments are removed and a bone graft is inserted to harden the segments. The pedicle screw system is inserted to vertebral bodies to fix two or more segments so that they can be firmly fused. In this study, a total of 7 patient-specific lumbar finite element models were created and pedicle screw systems were installed. The connecting rods made of titanium and CFR-PEEK was inserted to the generated models. Finite element analysis was conducted for four representative spine behaviors and statistical analysis was performed to investigate the biomechanical effects by the material properties of connecting rods. The intradiscal pressure of adjacent segments and the range of motion of the joints of each segment were investigated. In the subjects who used CFR-PEEK instead of Ti for connecting rods, the intradiscal pressure of adjacent segments tend to decrease and the range of motion of each segment tend to increase. However, no statistically significant difference in tendency was observed under all loading conditions.
Keywords
Composite Material; Lumbar Fusion; Carbon Fiber Reinforced PEEK; Statistical Analysis; Finite Element Analysis;
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