In vitro analysis of thoracic spinal motion segment flexibility during stepwise reduction of all functional structures

Purpose The aim of this study was to quantify the stabilizing effect of the passive structures in thoracic spinal motion segments by stepwise resections. These data can be used to calibrate finite element models of the thoracic spine, which are needed to explore novel surgical treatments of spinal d...

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Bibliographic Details
Published in:European spine journal 2020, Vol.29 (1), p.179-185
Main Authors: Wilke, Hans-Joachim, Grundler, Stefan, Ottardi, Claudia, Mathew, Chinnu-Elsa, Schlager, Benedikt, Liebsch, Christian
Format: Article
Language:English
Subjects:
Humans
Intervertebral Disc - physiology
Intervertebral Disc - surgery
Intervertebral discs
Ligaments
Ligaments, Articular - physiology
Ligaments, Articular - surgery
Mathematical models
Medicine
Medicine & Public Health
Neurosurgery
Nucleus pulposus
Original Article
Range of Motion, Articular - physiology
Rotation
Spine (thoracic)
Surgical Orthopedics
Thoracic Vertebrae - physiology
Thoracic Vertebrae - surgery
Tumors
Vertebrae
Zygapophyseal Joint - physiology
Zygapophyseal Joint - surgery
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Summary:Purpose The aim of this study was to quantify the stabilizing effect of the passive structures in thoracic spinal motion segments by stepwise resections. These data can be used to calibrate finite element models of the thoracic spine, which are needed to explore novel surgical treatments of spinal deformities, fractures, and tumours. Method Six human thoracic spinal motion segments from three segmental levels (T2–T3, T6–T7, and T10–T11) were loaded with pure moments of 1 and 2.5 Nm in flexion/extension, lateral bending, and axial rotation. After each loading step, the ligaments, facet capsules, and the nucleus pulposus were stepwise resected from posterior to anterior direction, while the segmental relative motions were measured using an optical motion tracking system. Results Significant increases ( p  
ISSN:0940-6719
1432-0932
DOI:10.1007/s00586-019-06196-7