A Biomechanical Analysis of the Clinical Stability of the Lumbar and Lumbosacral Spine

Eighteen Functional Spinal Units (FSU), representing three levels of human lumbar and lumbosacral spine, were tested using preload forces that corresponded to the clinical situation of a person lying supine or standing while subjected to maximum physiologic flexion or extension forces. Sagittal plane displacements were measured using linear variable differential transformers (LVDTs) and a MINC-11/03 minicomputer. Sequential transection of components in the posterior-to-anterior and anterior-to-posterior directions until failure occurred allowed measurements of the displacement sagittal plane translation and rotation of the intact and transected FSU.

[1]  H. Braus,et al.  Anatomie des Menschen: Ein Lehrbuch für Studierende und Ärzte Dritter Band Centrales Nervensystem , 1932 .

[2]  C HIRSCH,et al.  Studies on structural changes in the lumbar annulus fibrosus. , 1952, Acta orthopaedica Scandinavica.

[3]  C HIRSCH,et al.  New observations on the mechanical behavior of lumbar discs. , 1954, Acta orthopaedica Scandinavica.

[4]  W. Horton.  Further observations on the elastic mechanism of the intervertebral disc. , 1958, The Journal of bone and joint surgery. British volume.

[5]  H. R. Lissner,et al.  Biomechanical studies on the lumbar spine and pelvis. , 1959, The Journal of bone and joint surgery. American volume.

[6]  P. Rissanen,et al.  The surgical anatomy and pathology of the supraspinous and interspinous ligaments of the lumbar spine with special reference to ligament ruptures. , 1960, Acta orthopaedica Scandinavica. Supplementum.

[7]  A. Nachemson,et al.  Lumbar intradiscal pressure. Experimental studies on post-mortem material. , 1960, Acta orthopaedica Scandinavica. Supplementum.

[8]  S. Rolander.  Motion of the lumbar spine with special reference to the stabilizing effect of posterior fusion. An experimental study on autopsy specimens. , 1966, Acta orthopaedica Scandinavica.

[9]  R. Ramsey.  The Anatomy of the Ligamenta Flava , 1966, Clinical orthopaedics and related research.

[10]  C. Hirsch,et al.  Factors affecting the determination of the physical properties of femoral cortical bone. , 1966, Acta orthopaedica Scandinavica.

[11]  C Hirsch,et al.  Laboratory conditions for tensile tests in annulus fibrosus from human intervertebral discs. , 1967, Acta orthopaedica Scandinavica.

[12]  H. Kaufer,et al.  Patterns and mechanisms of lumbar injuries associated with lap seat belts. , 1969, The Journal of bone and joint surgery. American volume.

[13]  F Holdsworth,et al.  Fractures, dislocations, and fracture-dislocations of the spine. , 1963, The Journal of bone and joint surgery. American volume.

[14]  K. Markolf.  Deformation of the thoracolumbar intervertebral joints in response to external loads: a biomechanical study using autopsy material. , 1972, The Journal of bone and joint surgery. American volume.

[15]  A. White,et al.  Biomechanical analysis of clinical stability in the cervical spine. , 1975, Clinical orthopaedics and related research.

[16]  R. Brand,et al.  Mechanical properties of the human thoracic spine as shown by three-dimensional load-displacement curves. , 1976, The Journal of bone and joint surgery. American volume.

[17]  M M Panjabi,et al.  Effects of preload on load displacement curves of the lumbar spine. , 1977, The Orthopedic clinics of North America.

[18]  Manohar M. Panjabi,et al.  Clinical Biomechanics of the Spine , 1978 .

[19]  A. Schultz,et al.  Mechanical Properties of Human Lumbar Spine Motion Segments: Influences of Age, Sex, Disc Level, and Degeneration , 1979, Spine.