Optimised in vitro applicable loads for the simulation of lateral bending in the lumbar spine

Medical Engineering & Physics
Marcel DreischarfThomas Zander

Abstract

In in vitro studies of the lumbar spine simplified loading modes (compressive follower force, pure moment) are usually employed to simulate the standard load cases flexion-extension, axial rotation and lateral bending of the upper body. However, the magnitudes of these loads vary widely in the literature. Thus the results of current studies may lead to unrealistic values and are hardly comparable. It is still unknown which load magnitudes lead to a realistic simulation of maximum lateral bending. A validated finite element model of the lumbar spine was used in an optimisation study to determine which magnitudes of the compressive follower force and bending moment deliver results that fit best with averaged in vivo data. The best agreement with averaged in vivo measured data was found for a compressive follower force of 700 N and a lateral bending moment of 7.8 Nm. These results show that loading modes that differ strongly from the optimised one may not realistically simulate maximum lateral bending. The simplified but in vitro applicable loading cannot perfectly mimic the in vivo situation. However, the optimised magnitudes are those which agree best with averaged in vivo measured data. Its consequent application would lead to ...Continue Reading

References

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Jun 15, 2010·Journal of Biomechanics·Marcel DreischarfAntonius Rohlmann
Jun 28, 2011·Journal of Biomechanics·Marcel DreischarfThomas Zander

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Citations

Oct 21, 2011·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·Antonius RohlmannHadi N Boustani
Jul 23, 2013·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·A RohlmannT Zander
Jun 19, 2012·Clinical Biomechanics·Rui ZhuAntonius Rohlmann
Jun 28, 2018·Annals of Biomedical Engineering·P Khoddam-KhorasaniA Shirazi-Adl
Oct 27, 2017·Journal of Healthcare Engineering·Zhi-Li ZengLi-Ming Cheng
Nov 17, 2016·Computer Methods in Biomechanics and Biomedical Engineering·Sadegh Naserkhaki, Marwan El-Rich
Jun 12, 2021·International Journal for Numerical Methods in Biomedical Engineering·Samuele L GouldMarco Viceconti
Aug 3, 2021·Computer Methods and Programs in Biomedicine·Minhye Jo, Soo-Won Chae

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