Title: Three-dimensional finite element analysis of unilateral and bilateral lumbar facetectomy
Abstract: Objective: To observe the biomechanical effects of unilateral and bilateral lumbar facetetomy on lumbar stability. Methods: L 3~L 4 three dimensional finite element model was used. Results: The maximum Von Mises stress in disc annulus increased from 0.72 MPa to 0.81 MPa after total bilateral facetectomy, and significant increase in segment motion was found when the facet resection was incremented on unilateral or bilateral facetectomy.The most prominent trend occurred in axial torsion and extension,while the least prominent trend occurred in preflexion. Conclusions: The patterns of the maximum Von Mises in relation to the degree of facet resection are similar to those of the rotation range.The facets at one side mainly limited the motion segment to lateral bending and axial torsion in opposite direction,but have less effect in the same direction.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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