Failure Tolerance of the Human Lumbar Spine in Combined Compression and Flexion Loading
| Autor: | Sophia K. Tushak, John Paul Donlon, Bronislaw D. Gepner, Aida Chebbi, Bengt Pipkorn, Jason J. Hallman, Jason L. Forman, Jason R. Kerrigan |
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| Rok vydání: | 2021 |
| Předmět: |
musculoskeletal diseases
Lumbar Vertebrae Rehabilitation Biomedical Engineering Biophysics Accidents Traffic FOS: Physical sciences Quantitative Biology - Tissues and Organs Physics - Medical Physics Biomechanical Phenomena FOS: Biological sciences Humans Spinal Fractures Orthopedics and Sports Medicine Medical Physics (physics.med-ph) Range of Motion Articular Tissues and Organs (q-bio.TO) |
| DOI: | 10.48550/arxiv.2105.11962 |
| Popis: | Vehicle safety systems have substantially decreased motor vehicle crash-related injuries and fatalities, but injuries to the lumbar spine still have been reported. Experimental and computational analyses of upright and, particularly, reclined occupants in frontal crashes have shown that the lumbar spine can be subjected to axial compression followed by combined compression-flexion loading. Lumbar spine failure tolerance in combined compression-flexion has not been widely explored in the literature. Therefore, the goal of this study was to measure the failure tolerance of the lumbar spine in combined compression and flexion. Forty 3-vertebra lumbar spine segments were pre-loaded with axial compression and then subjected to dynamic flexion bending until failure. Clinically relevant middle vertebra fractures were observed in twenty-one of the specimens, including compression and burst fractures. The remaining nineteen specimens experienced failure at the potting grip interface. Since specimen characteristics and pre-test axial load varied widely within the sample, failure forces (mean 3.4 kN, range 1.6-5.1 kN) and moments (mean 73 Nm, range 0-181 Nm) also varied widely. Tobit univariate regressions were performed to determine the relationship between censored failure tolerance and specimen sex, segment type (upper/lower), age, and cross-sectional area. Age, sex, and cross-sectional area significantly affected failure force and moment individually (p 24 pages, 10 tables/figures |
| Databáze: | OpenAIRE |
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