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The Effect of Compression Applied Through Constrained Lateral Eccentricity on the Failure Mechanics and Flexibility of the Human Cervical Spine
- Source :
- Journal of Biomechanical Engineering. 142
- Publication Year :
- 2020
- Publisher :
- ASME International, 2020.
-
Abstract
- In contrast to sagittal plane spine biomechanics, little is known about the response of the cervical spine to axial compression with lateral eccentricity of the applied force. This study evaluated the effect of lateral eccentricity on the kinetics, kinematics, canal occlusion, injuries, and flexibility of the cervical spine in translationally constrained axial impacts. Eighteen functional spinal units were subjected to flexibility tests before and after an impact. Impact axial compression was applied at one of three lateral eccentricity levels based on percentage of vertebral body width (low = 5%, medium = 50%, high = 150%). Injuries were graded by dissection. Correlations between intrinsic specimen properties and injury scores were examined for each eccentricity group. Low lateral force eccentricity produced predominantly bone injuries, clinically recognized as compression injuries, while medium and high eccentricity produced mostly contralateral ligament and/or disc injuries, an asymmetric pattern typical of lateral loading. Mean compression force at injury decreased with increasing lateral eccentricity (low = 3098 N, medium = 2337 N, and high = 683 N). Mean ipsilateral bending moments at injury were higher at medium (28.3 N·m) and high (22.9 N·m) eccentricity compared to low eccentricity specimens (0.1 N·m), p
- Subjects :
- Facet (geometry)
Flexibility (anatomy)
media_common.quotation_subject
Biomedical Engineering
Intervertebral Disc Degeneration
03 medical and health sciences
0302 clinical medicine
Physiology (medical)
Pressure
medicine
Eccentricity (behavior)
media_common
030505 public health
business.industry
Biomechanics
Anatomy
Compression (physics)
Sagittal plane
Biomechanical Phenomena
medicine.anatomical_structure
Coronal plane
Cervical Vertebrae
Ligament
0305 other medical science
business
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 15288951 and 01480731
- Volume :
- 142
- Database :
- OpenAIRE
- Journal :
- Journal of Biomechanical Engineering
- Accession number :
- edsair.doi.dedup.....484f0571ef5af8ce2ad04dfb46b277c0