Conference proceeding
Load sharing comparison of a rigid vs. a hinged device in the stabilized lumbar motion segment: A finite element study
Winter Annual Meeting, International Mechanical Engineering Congress & Exposition, Anaheim, CA, Nov. 15-20, 1998., pp.193-194
11/1998
Abstract
This study investigated the dynamic load-sharing ability of a rigid versus a hinged pedicle screw-rod system using finite element analysis. A three-dimensional finite element model (FEM) of an intact L3-L4 motion segment was used in the investigation. The model was modified to incorporate both the rigid screw-rod device and the hinged screw-rod device. Both models were run for 800 N compression, 10 N-m flexion, and 10 N-m of extension. The loads through the nucleus of the intervertebral disc and the corresponding loads through the device were determined for each case. Additionally, the axial displacement of L3 and the flexion rotation of L3 with respect to L4 were determined. Both screw-rod devices provided stability to a destabilized spinal segment. However, the rigid device system allowed for slightly greater flexion rotation. Furthermore, the hinged pedicle screw-rod system offers a design more likely to promote increased load sharing without sacrificing construct stability, as compared to an equivalent rigid system.
Details
- Title: Subtitle
- Load sharing comparison of a rigid vs. a hinged device in the stabilized lumbar motion segment: A finite element study
- Creators
- Vijay K GoelNicole M GroslandRegina J KonzLeon J GroblerHsiung-Tsai ChangKathleen D Chesmel
- Resource Type
- Conference proceeding
- Publication Details
- Winter Annual Meeting, International Mechanical Engineering Congress & Exposition, Anaheim, CA, Nov. 15-20, 1998., pp.193-194
- Language
- English
- Date published
- 11/1998
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Orthopedics and Rehabilitation; Injury Prevention Research Center
- Record Identifier
- 9984185365302771
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