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Ranges of Cervical Intervertebral Disc Deformation During an In Vivo Dynamic Flexion-Extension of the Neck.
- Source :
-
Journal of biomechanical engineering [J Biomech Eng] 2017 Jun 01; Vol. 139 (6). - Publication Year :
- 2017
-
Abstract
- While abnormal loading is widely believed to cause cervical spine disc diseases, in vivo cervical disc deformation during dynamic neck motion has not been well delineated. This study investigated the range of cervical disc deformation during an in vivo functional flexion-extension of the neck. Ten asymptomatic human subjects were tested using a combined dual fluoroscopic imaging system (DFIS) and magnetic resonance imaging (MRI)-based three-dimensional (3D) modeling technique. Overall disc deformation was determined using the changes of the space geometry between upper and lower endplates of each intervertebral segment (C3/4, C4/5, C5/6, and C6/7). Five points (anterior, center, posterior, left, and right) of each disc were analyzed to examine the disc deformation distributions. The data indicated that between the functional maximum flexion and extension of the neck, the anterior points of the discs experienced large changes of distraction/compression deformation and shear deformation. The higher level discs experienced higher ranges of disc deformation. No significant difference was found in deformation ranges at posterior points of all the discs. The data indicated that the range of disc deformation is disc level dependent and the anterior region experienced larger changes of deformation than the center and posterior regions, except for the C6/7 disc. The data obtained from this study could serve as baseline knowledge for the understanding of the cervical spine disc biomechanics and for investigation of the biomechanical etiology of disc diseases. These data could also provide insights for development of motion preservation surgeries for cervical spine.
- Subjects :
- Adult
Biomechanical Phenomena
Female
Humans
Intervertebral Disc diagnostic imaging
Intervertebral Disc pathology
Intervertebral Disc Degeneration diagnostic imaging
Intervertebral Disc Degeneration pathology
Intervertebral Disc Displacement diagnostic imaging
Intervertebral Disc Displacement pathology
Male
Models, Anatomic
Range of Motion, Articular
Tomography, X-Ray Computed
Cervical Vertebrae physiopathology
Intervertebral Disc physiopathology
Intervertebral Disc Degeneration physiopathology
Intervertebral Disc Displacement physiopathology
Mechanical Phenomena
Neck physiopathology
Subjects
Details
- Language :
- English
- ISSN :
- 1528-8951
- Volume :
- 139
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Journal of biomechanical engineering
- Publication Type :
- Academic Journal
- Accession number :
- 28334358
- Full Text :
- https://doi.org/10.1115/1.4036311