A finite element study of the effect of cross-link stabilisation in a lumbar spine tumour model
Juntong Lai, James Tomlinson, Lee Breakwell, Damien Lacroix
TL;DR
This study uses a computer model to examine how cross-link stabilisation affects stress in a lumbar spine with a growing tumor.
Contribution
The study introduces a finite element model to evaluate cross-link stabilisation effects on spinal stability in tumor growth scenarios.
Findings
Cross-link stabilisation reduces stress in the L3 vertebra under torsion with increasing tumor volume.
Compressive stress concentrates in the L3 anterior vertebra when tumor volume exceeds 10.1%.
Cross-link position influences stress reduction and spinal stability, suggesting optimal placement for clinical use.
Abstract
Spinal metastases can increase the risks of vertebral fracture due to bony destruction and instability in the spine. There are concerns that cross-links may impair adjuvant treatments, such as radiotherapy and proton beam therapy. The aim of this study was to assess the biomechanical effects of cross-link stabilisation for a growing tumour in order to provide recommendations on the use and placement of the cross-link. A finite element (FE) model of a fixation device was developed. The device was inserted virtually into a FE model of the lumbar spine (L1–S1) between L2 and L4. Tumour deposit of either 1.3%, 10.1%, 38.3%, 71.5% and 92.1% of the vertebral body was simulated. A 1000 N compressive, a 10° lateral bending and a 7.5 Nm torsional load were simulated on the top of L1. Results indicate that the stabilisation is capable of reducing the stress of the L3 lumbar spine under torsion…
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Taxonomy
TopicsManagement of metastatic bone disease · Spine and Intervertebral Disc Pathology · Spinal Fractures and Fixation Techniques