|Publisher DOI:||10.2486/indhealth.2015-0162||Title:||Failure of the human lumbar motion-segments resulting from anterior shear fatigue loading||Language:||English||Authors:||Skrzypiec, Daniel M.
|Issue Date:||30-Jan-2016||Source:||Industrial Health 4 (54): 308-314 (2016)||Journal or Series Name:||Industrial health||Abstract (english):||An in-vitro experiment was designed to investigate the mode of failure following shear fatigue loading of lumbar motion-segments. Human male lumbar motion-segments (age 32-42 years, n=6) were immersed in Ringer solution at 37°C and repeatedly loaded, using a modified materials testing machine. Fatigue loading consisted of a sinusoidal shear load from 0 N to 1,500 N (750 N ± 750 N) applied to the upper vertebra of the motion-segment, at a frequency of 5 Hz. During fatigue experiments, several failure events were observed in the dynamic creep curves. Post-test x-ray, CT and dissection revealed that all specimens had delamination of the intervertebral disc. Anterior shear fatigue predominantly resulted in fracture of the apophyseal processes of the upper vertebrae (n=4). Exposure to the anterior shear fatigue loading caused motion-segment instability and resulted in vertebral slip corresponding to grade I and ‘mild’ grade II spondylolisthesis, as observed clinically.||URI:||http://hdl.handle.net/11420/3049||ISSN:||1880-8026||Institute:||Biomechanik M-3||Type:||(wissenschaftlicher) Artikel|
|Appears in Collections:||Publications without fulltext|
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