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Related Concept Videos

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Spongy Bone

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All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
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Compact Bone01:27

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
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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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Updated: Apr 18, 2026

Fragility Assessment of Bovine Cortical Bone Using Scratch Tests
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Links between mechanical behavior of cancellous bone and its microstructural properties under dynamic loading.

M Prot1, D Saletti2, S Pattofatto3

  • 1LBM/Institut de Biomécanique Humaine Georges Charpak, 151 Boulevard de l׳Hôpital, 75013 Paris, France.

Journal of Biomechanics
|January 12, 2015
PubMed
Summary

Bone microarchitecture predicts fracture risk. Study shows cancellous bone

Keywords:
Cancellous boneConfinementDynamic behaviorMicrostructural parameters

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Area of Science:

  • Biomechanics
  • Biomaterials Science
  • Orthopedic Research

Background:

  • In vivo fracture risk assessment relies on linking bone microarchitecture from clinical imaging to mechanical properties.
  • Understanding cancellous bone's mechanical response under dynamic loading is crucial for trauma injury prediction.

Purpose of the Study:

  • To investigate the relationship between cancellous bone microarchitecture and mechanical properties under dynamic loading.
  • To determine if low strain rate results can predict responses at high strain rates relevant to trauma.
  • To assess the influence of boundary conditions (confinement) on bone's mechanical response.

Main Methods:

  • Cancellous bovine bone specimens were subjected to dynamic compression with and without confinement.
  • pQCT (peripheral Quantitative Computed Tomography) was used to assess microarchitectural properties (e.g., bone volume fraction).
  • Mechanical response properties (Young's modulus, ultimate stress, strain, energy) were measured.

Main Results:

  • Bone volume fraction (BV/TV) was a significant determinant of mechanical response, comparable to ultimate stress at high strain rates (p<0.001).
  • Statistical laws were found to govern the usefulness of micro-architecture descriptions.
  • Differences in dynamic confined vs. non-confined tests were attributed to bone marrow influence and boundary conditions.

Conclusions:

  • Cancellous bone's high strain rate response, under various boundary conditions, can be predicted using architectural parameters.
  • The established relationships between microarchitecture and mechanical properties can inform fracture risk prediction.
  • Findings suggest low strain rate data extrapolation is feasible for trauma-level loading scenarios.