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Related Concept Videos

Bone Structure01:55

Bone Structure

Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.

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Related Experiment Video

Updated: May 8, 2026

Outer-Boundary Assisted Segmentation and Quantification of Trabecular Bones by an Imagej Plugin
09:36

Outer-Boundary Assisted Segmentation and Quantification of Trabecular Bones by an Imagej Plugin

Published on: March 14, 2018

A novel approach to estimate trabecular bone anisotropy using a database approach.

Javad Hazrati Marangalou1, Keita Ito, Matteo Cataldi

  • 1Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.

Journal of Biomechanics
|August 27, 2013
PubMed
Summary

This study shows that using a database of high-resolution bone models to determine orthotropic properties significantly improves finite element (FE) analysis accuracy for bone strength estimation. This approach overcomes limitations of low-resolution clinical CT scans, leading to more reliable pre-clinical bone strength predictions.

Keywords:
AnisotropyBoneDatabase approachFinite element method

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Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model
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Last Updated: May 8, 2026

Outer-Boundary Assisted Segmentation and Quantification of Trabecular Bones by an Imagej Plugin
09:36

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Published on: March 14, 2018

Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model
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Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model

Published on: September 8, 2023

Area of Science:

  • Biomechanics
  • Biomaterials Engineering
  • Medical Imaging Analysis

Background:

  • Continuum finite element (FE) models are crucial for pre-clinical bone strength estimation, typically using isotropic material properties derived from clinical CT scans.
  • Trabecular bone exhibits orthotropic elastic behavior, but clinical CT resolution limits accurate fabric (orientation) measurement for orthotropic FE models.
  • Existing methods struggle to incorporate patient-specific anisotropic properties due to low-resolution imaging data.

Purpose of the Study:

  • To investigate if finite element (FE) models using fabric information from a high-resolution bone database can yield more accurate bone strength predictions than isotropic models.
  • To assess the feasibility of deriving missing trabecular bone orientation (fabric) data from a database for FE analysis.
  • To compare the accuracy of database-derived orthotropic models against gold-standard micro-CT orthotropic models and simplified isotropic models.

Main Methods:

  • Generated a database of 33 human proximal femurs from micro-CT scans (82 µm resolution).
  • Created continuum FE models using a mesh template and morphing tool, analyzing bone volume fraction and fabric tensor within 2mm spherical regions.
  • Compared four model types for 10 test femurs: micro-CT orthotropic (gold standard), database-derived orthotropic, isotropic-I (identity tensor), and isotropic-II (fitted stiffness).
  • Simulated failure and post-failure behavior under a fall-to-the-side scenario using an elastic-plastic damage model.

Main Results:

  • All models showed similar stress distributions, but isotropic models significantly underestimated stress/damage compared to the gold standard.
  • Database-derived orthotropic models showed no significant difference from the gold standard.
  • Isotropic-I models underestimated whole bone stiffness by 26.3% and ultimate load by 14.5% compared to the gold standard.
  • Database-derived orthotropic models underestimated stiffness by only 4.9% and ultimate load by 3.1% compared to the gold standard.

Conclusions:

  • Utilizing a database to estimate patient-specific anisotropic material properties considerably improves the accuracy of bone strength prediction in FE models.
  • This database-driven approach effectively overcomes the limitations of low-resolution clinical CT scans in capturing trabecular bone fabric.
  • The findings suggest this method will enhance accuracy for conditions where bone anisotropy is significant, such as in osteoporotic patients and around implants.