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[Multi-segment ventral stabilization of the lumbar spine: a comparative biomechanical study]
Zeitschrift Fur Orthopadie Und Ihre Grenzgebiete
|May 1, 1995
Summary
This study compared the stability of three spinal fixation devices: VDS, TSRH, and CDH. CDH demonstrated superior stability, particularly in flexion/extension, outperforming both VDS and TSRH in multisegmental spinal instrumentation.
Area of Science:
- Spinal surgery
- Biomechanics
- Orthopedic devices
Background:
- Multisegmental spinal instrumentation is crucial for stabilizing the spine.
- Anterior spinal fixation devices are commonly used for this purpose.
- Understanding the comparative stability of different devices is essential for clinical decision-making.
Purpose of the Study:
- To evaluate and compare the in-vitro stability of three anterior spinal fixation devices: VDS, TSRH, and CDH.
- To assess device performance under various physiological loading conditions.
Main Methods:
- In-vitro biomechanical testing of L1-L5 human cadaveric spine segments.
- Destabilization followed by instrumentation with VDS, TSRH, or CDH for three segments.
- Three-dimensional measurement of spinal rotation and translation under flexion/extension, lateral bending, and axial rotation.
Main Results:
- TSRH showed significantly higher stiffness than VDS in flexion/extension and torsion (p < 0.05).
- CDH was significantly more stable than VDS across all tested movements.
- CDH exhibited greater stiffness than TSRH in flexion/extension, with no significant differences in bending or rotation.
Conclusions:
- CDH offers superior stability for multisegmental spinal fixation compared to VDS and TSRH.
- Device selection should consider the specific biomechanical demands of the spinal segment being treated.