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Related Concept Videos

Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

147
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
147
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

263
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
263

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Related Experiment Video

Updated: Jun 23, 2025

An In Vitro Organ Culture Model of the Murine Intervertebral Disc
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An In Vitro Organ Culture Model of the Murine Intervertebral Disc

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Unveiling interactions between intervertebral disc morphologies and mechanical behavior through personalized finite

Estefano Muñoz-Moya1, Morteza Rasouligandomani1, Carlos Ruiz Wills1

  • 1BCN MedTech, Department of Engineering, Universitat Pompeu Fabra, Barcelona, Spain.

Frontiers in Bioengineering and Biotechnology
|June 25, 2024
PubMed
Summary

This study links intervertebral disc (IVD) shape to mechanical stress, revealing how local morphology influences degeneration. Personalized models show specific features impact stress distribution, offering insights into disc health.

Keywords:
finite element methodintervertebral discmachine learningmodel repositorymorphing algorithmmorphological analysispatient-personalizedpatient-specific

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Precision Measurements and Parametric Models of Vertebral Endplates
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Last Updated: Jun 23, 2025

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Precision Measurements and Parametric Models of Vertebral Endplates
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Precision Measurements and Parametric Models of Vertebral Endplates

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Area of Science:

  • Biomechanics and Mechanobiology
  • Computational Modeling and Simulation
  • Spine Research and Degenerative Disc Disease

Background:

  • Intervertebral disc degeneration (IDD) is a major health issue, with mechanotransduction playing a potential role.
  • The precise relationship between local intervertebral disc (IVD) morphology and mechanical behavior in IDD remains underexplored.
  • Understanding these interplays is crucial for developing targeted interventions for IDD.

Purpose of the Study:

  • To investigate the interplay between patient-specific IVD morphology and mechanical responses using computational simulations.
  • To develop and validate a novel automated method for creating personalized finite element (FE) models of the IVD.
  • To explore correlations between morphological features and mechanical parameters relevant to IDD.

Main Methods:

  • Developed an automated mesh morphing technique to generate 169 patient-personalized (PP) IVD finite element (FE) models from structured hexahedral meshes.
  • Utilized Bayesian Coherent Point Drift++ and segmented MRI data from the MySpine project to create accurate Annulus Fibrosus (AF) and Nucleus Pulposus (NP) geometries.
  • Employed machine learning regression models (Linear Regression, SVR, XGBoost) to analyze morphology-mechanics correlations.

Main Results:

  • Achieved high similarity scores (92.06% for AF, 92.10% for NP) between generated PP models and segmented images, maintaining mesh quality.
  • Validated the constitutive model with a low relative error (5.20%) against literature data.
  • Identified significant influence of IVD heights, sagittal areas, and volumes on mechanotransduction responses, with disc ellipticity affecting minimum principal stress.

Conclusions:

  • Local IVD morphologies, including height, area, and volume, significantly impact indirect mechanotransduction, influencing stress distribution.
  • Cartilage endplate (CEP) mechanical responses are indirectly influenced by the morphology of the Annulus Fibrosus (AF) and Nucleus Pulposus (NP), not their local shapes.
  • The created repository of personalized disc characteristics offers a valuable resource for advancing IDD research and potential therapeutic strategies.