Related Experiment Video
Updated: Jan 25, 2026
Proximal Cadaveric Femur Preparation for Fracture Strength Testing and Quantitative CT-based Finite Element Analysis
Published on: March 11, 2017
Cross-link is a risk factor for rod fracture at pedicle subtraction osteotomy site: A finite element study
Tae Hyun Park1, Su Heon Woo2, Sung Jae Lee3
1R&D Center, Medyssey Co, Ltd, Jechon, Republic of Korea; Department of Biomedical Engineering, College of Biomedical Science& Engineering, Inje University, Gyeongnam, Republic of Korea; Department of Neurosurgery, CHA University, CHA Bundang Medical Center, Republic of Korea.
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.
More Related Videos
Related Concept Videos
01:26Factors Affecting the Risk of Infection
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
01:34Crossing Over
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process...
01:27Elements and Compounds
Elements
Elements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...
04:00Periodic Classification of the Elements
02:54Classification of Elements and Compounds
Compounds are pure substances composed of two or more elements in fixed, definite proportions. Compounds are classified as ionic or molecular (covalent) based on the bonds...
01:50Cross-Sectional Research