Model Validation
 and Verification

Univ.-Prof. biol. hum. Hendrik Schmidt

Learn more about model validation
 and verification.

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Assurance of Model Accuracy

Comparison of implant loads for vertebral body replacement between simulation and in vivo measurement.
Load-deflection curves of our finite element model of the lumbar spine and of in vitro measurements.

The finite element method is a very useful tool to investigate the mechanical function of biological structures. The major advantage of this method is the analysis of every possible mechanical parameter, particularly in structural regions where it may be difficult or impossible to obtain experimental data. However, model credibility must be established before clinicians and scientists can be expected to extrapolate information based on model predictions. In other words, it must be ensured that the model is verified and validated.
In the following there is a summary of papers which describe how we performed our model verification and validation. 

Publications

2009
Discretization error when using finite element models: Analysis and evaluation of an underestimated problem.

Hendrik Schmidt, Tobias Alber, Tim Wehner, Robert Blakytny, Hans-Joachim Wilke
J Biomech 07/2009; 42(12):1926-34.
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2008
A method to obtain surface strains of soft tissues using a laser scanning device.

Frank Heuer, Uwe Wolfram, Hendrik Schmidt, Hans-Joachim Wilke
J Biomech 07/2008; 41(11):2402-10.
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The relation between intervertebral disc bulging and annular fiber associated strains.
Frank Heuer, Hendrik Schmidt, Hans-Joachim Wilke
J Biomech 07/2008; 41.
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A new laser scanning technique for imaging intervertebral disc displacement and its application to modeling nucleotomy.
Frank Heuer, Hendrik Schmidt, Lutz Claes, Hans-Joachim Wilke
Clin Biomech 04/2008; 23(3):260-9.
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The relation between the instantaneous center of rotation and facet joint forces - A finite element analysis.
Hendrik Schmidt, Frank Heuer, Lutz Claes, Hans-Joachim Wilke
Clin Biomech 04/2008; 23(3):270-8.
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Stepwise reduction of functional spinal structures increase disc bulge and surface strains.
Frank Heuer, Hendrik Schmidt, Hans-Joachim Wilke
J Biomech 02/2008; 41(9):1953-60.
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The relation between intervertebral disc bulging and annular fiber associated strains for simple and complex loading.
Frank Heuer, Hendrik Schmidt, Hans-Joachim Wilke
J Biomech 02/2008; 41(5):1086-94.
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2007
Creep associated changes in intervertebral disc bulging obtained with a laser scanning device.

Frank Heuer, Herbert Schmitt, Hendrik Schmidt, Lutz Claes, Hans-Joachim Wilke
Clin Biomech 09/2007; 22(7):737-44.
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Application of a calibration method provides more realistic results for a finite element model of a lumbar spinal segment.
Hendrik Schmidt, Frank Heuer, Joerg Drumm, Zdenek Klezl, Lutz Claes, Hans-Joachim Wilke
Clin Biomech 06/2007; 22(4):377-84.
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Stepwise reduction of functional spinal structures increase vertebral translation and intradiscal pressure.
Frank Heuer, Hendrik Schmidt, Lutz Claes, Hans-Joachim Wilke
J Biomech 02/2007; 40(4):795-803.
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Stepwise reduction of functional spinal structures increase range of motion and change lordosis angle.
Frank Heuer, Hendrik Schmidt, Zdenek Klezl, Lutz Claes, Hans-Joachim Wilke
J Biomech 02/2007; 40(2):271-80.
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2006
Application of a new calibration method for a three-dimensional finite element model of a human lumbar annulus fibrosus.

Hendrik Schmidt, Frank Heuer, Ulrich Simon, Annette Kettler, Antonius Rohlmann, Lutz Claes, Hans-Joachim Wilke
Clin Biomech 06/2006; 21(4):337-44.
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Barbara Schiller

Secretariat Prof. Hendrik Schmidt

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