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Lag-Screw Osteosynthesis in Thoracolumbar Pincer Fractures by Marc Auerswald; Philipp Messer-Hannemann; Kay Sellenschloh; Jan Wahlefeld; Klaus Püschel; Sven Hirschfeld Araujo; Michael M. Morlock; Arndt P. Schulz; Gerd Huber is a Medicine article available to read on EtoBox.

What is Lag-Screw Osteosynthesis in Thoracolumbar Pincer Fractures about?

## Study Design: Biomechanical. ## Objective: This study evaluates the biomechanical properties of lag-screws used in vertebral pincer fractures at the thoracolumbar junction. ## Methods: Pincer fractures were created in 18 bisegmental human specimens. The specimens were assigned to three groups depending on their treatment perspective, either bolted, with the thread positioned in the cortical or cancellous bone, or control. The specimens were mounted in a servo-hydraulic testing machine and loaded with a 500 N follower load. They were consecutively tested in 3 different conditions: intact, fractured, and bolted/control. For each condition 10 cycles in extension/flexion, torsion, and lateral bending were applied. After each tested condition, a computed tomography (CT) scan was performed. Finally, an extension/flexion fatigue loading was applied to all specimens. ## Results: Biomechanical results revealed a nonsignificant increase in stiffness in extension/flexion of the fractured specimens compared with the intact ones. For lateral bending and torsion, the stiffness was significantly lower. Compared with the fractured specimens, no changes in stiffness due to bolting were discovere

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Author

Marc Auerswald; Philipp Messer-Hannemann; Kay Sellenschloh; Jan Wahlefeld; Klaus Püschel; Sven Hirschfeld Araujo; Michael M. Morlock; Arndt P. Schulz; Gerd Huber

Publisher

SAGE Publications

Published

2020

Language

EN

Field

Medicine (Health Sciences)