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- Title
Quasi-static and cyclic compressive loading studies of the intervertebral disc with combined flexion and torsion.
- Authors
Schechtman, Helio; Robertson, Peter Alexander; Broom, Neil David
- Abstract
Bovine caudal motion segments were used to investigate the loss of load-bearing ability of the intervertebral disc (IVD) under both quasi-static and cyclic compressive loading combined with torsion and flexion. While the response of the disc to both compressive hyper-flexion and hyper-torsion has been previously investigated much less is known about their individual and combined influence on compressive failure. Eighty motion segments dissected from 41 bovine tails were subjected to quasi-static and cyclic compression with added components of flexion and torsion. The four different combinations of flexion and torsion were 0º torsion/0º flexion, 10º torsion/15º flexion, 10º torsion/0º flexion and 0º torsion/15º flexion. Quasi-static compression failed to show any significant difference among the different combinations of torsion and flexion for failure stress, failure strain and compressive tangent modulus. Cyclic compression indicated a significant influence of torsion in reducing the disc’s load-bearing ability. Cyclic loading provides a more sensitive tool for the assessment of potentially damaging mechanical parameters for the IVD.
- Subjects
CYCLIC loads; QUASISTATIC processes; INTERVERTEBRAL disk; WEIGHT-bearing (Orthopedics); TORSION
- Publication
Revista Brasileira de Engenharia Biomédica, 2012, Vol 28, Issue 4, p311
- ISSN
1517-3151
- Publication type
Article
- DOI
10.4322/rbeb.2012.038