Biomechanics of Lumbar Fixation Devices (Pedicle, Facet, Interspine)

Abstract

<p>Original spinal fixation techniques consisted of fusing two or more vertebrae together when an intervertebral disc was removed. This technique provided the structural support needed for the spinal column but reduced the range of motion (ROM) a person would experience post-operatively. This technique also increased the stress on the adjacent spinal segments resulting in pain and degradation of these spinal members. The evolutions of spinal fixation devices have helped retain some of the natural ROM seen in an intact (normal) spinal column while providing the structural support. However, the lack of biomechanical evaluation of these devices allows for some of the previous issues to persist. Biomechanical evaluation of the spine is the understanding of the natural ROM when loads are applied to the spine in flexion, extension, lateral bending and axial torsion. The goal of this research is to show the current methods of biomechanical testing employed when evaluating a device's interaction with the spine post-operatively. Utilizing this information will help improve device development with the goal of maximizing the ROM while maintaining structural stability.</p><p>This presentation occurred at the Wright State University Campus-Wide Celebration of Research, Scholarship and Creative Activities on April 8, 2011</p>