The Role of the Lumbar Facet Joints in Spinal Stability

Abstract

The facet joints of the lumbar spine are not the principle support structures in extension. With destruction of the facets, an alternate path of loading is established. The alternate path of loading transfers axial loads to the anulus and anterior longitudinal ligament to support the spine. Although facet joint destruction will not produce acute instability, it will transfer the loads to the adjacent disc and conceivably accelerate its degeneration.