Effect of Facetectomy on Lumbar Spinal Stability Under Sagittal Plane Loadings

• DOI: 10.1097/01.brs.0000132650.24437.15
• Publication Date: 2004-09-03T08:08:55Z
• Authors: Kim Kheng Lee; E C. Teo; T X. Qiu; K Yang
• Keywords: Facetectomy; Facet (psychology); Biomechanics

A study using an anatomically accurate finite-element model of a L2-L3 motion segment to investigate the biomechanical effects graded bilateral and unilateral facetectomies L3 under flexion extension loadings.To predict amount facetectomy on lumbar that would cause segmental instability, therefore enhancing understanding concerning role facet sagittal loadings.This provides quantitative facets in preserving stability. Previous analytical models lack three-dimensional structural characterization insufficient element representation for joints.A validated was subjected loadings at 7.5 Nm. Effects ligaments were examined establish their relative importance response. The effect iatrogenic changes (graded facetectomy) then investigated these alterations terms gross external (angular coupled) responses, flexibilities, load.This shows prevent rotational instabilities flexion. is insignificant In extension, resection contralateral markedly alters flexibilities as well coupled motions. Also, complete with less than 100% generates high load.Clinically, this suggests it may be appropriate incorporate additional stabilization procedure restoring spinal strength stability surgical intervention facet. exploitation method simulate clinically related situations permits improved assist defining clinical expectation various forms operative procedures.