A finite element study on posterior short segment fixation combined with unilateral fixation using pedicle screws for stable thoracolumbar fracture

Medicine
Yunshan SuPengcheng Wang

Abstract

The objective of this study was to use finite element models to investigate the biomechanics of stable thoracolumbar burst fracture repair using unilateral short-segment fixation and 4 alternate pedicle screw systems.Four posterior pedicle screw systems were compared for unilateral short-segment fixation using finite element models: intermediate bilateral short pedicle screw fixation, intermediate bilateral long pedicle screw fixation, intermediate unilateral short pedicle screw fixation, and intermediate unilateral long pedicle screw fixation. We compared range of motion (ROM), von Mises stresses on the implants, and stress on the intervertebral discs superior and inferior to the injured vertebra during simulated spinal movements.There were no significant differences in ROM, von Mises stress, or intervertebral disc stress among the 4 intermediate pedicle screw fixation techniques for all spinal movements evaluated. In addition, there were no consolidated trends depicting beneficial differences between the short and long screw models, or between the unilateral and bilateral screw models.ROM, von Mises stress, and intervertebral disc stress are the same across the 4, posterior short-segment fixation techniques evaluated using fi...Continue Reading

References

Dec 1, 1993·Journal of Spinal Disorders·B JeanneretF Magerl
Oct 13, 1998·The Journal of Bone and Joint Surgery. British Volume·F C OnerA J Verbout
Sep 14, 1999·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·U MüllerO Schwarzenbach
Jan 25, 2002·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·V J LeferinkH J ten Duis
May 22, 2003·Journal of Biomechanics·Elise F MorganTony M Keaveny
Nov 27, 2004·Spine·Jill P G UrbanJeremy C T Fairbank
Jan 30, 2008·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·Xiang-Yang WangYong-Long Chi
Aug 5, 2009·Journal of Spinal Disorders & Techniques·Osman GuvenUfuk Nalbantoglu
Jan 11, 2011·Journal of Neurosurgery. Spine·Ali A BaajNeil R Crawford
Feb 18, 2011·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·Jinhui ShiHuilin Yang
May 11, 2011·Orthopedics·Matthew I SteinStephen Raterman
Aug 15, 2012·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Jian WangJie Liu
Aug 23, 2012·Indian Journal of Orthopaedics·Che-Wei LiuShyu-Jye Wang
Dec 26, 2012·The Spine Journal : Official Journal of the North American Spine Society·Tae-Ahn JahngKyung Yun Moon

❮ Previous
Next ❯

Software Mentioned

SolidWorks
Geomagic Studio
Workbench
Mimics
Ansys

Related Concepts

Related Feeds

Biomechanics

Biomechanics examines the generation of internal forces within the body and investigates the effects and control of forces that act on or are produced on tissues. Here are the latest discoveries.