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Related Concept Videos

Compact Bone01:27

Compact Bone

Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
Gross Anatomy of Bone01:17

Gross Anatomy of Bone

The two main features of a long bone are the diaphysis and the epiphysis.
The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The walls of the diaphysis are composed of dense and hard compact bone made of numerous osteons — the functional unit of the compact bone. The hollow region in the diaphysis is called the medullary cavity, which harbors the bone marrow. In infants and children, this marrow cavity is filled with red marrow, whereas in adults, it...
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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Software-Assisted Quantitative Measurement of Osteoarthritic Subchondral Bone Thickness
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Measuring bone quality.

Elisa Torres-del-Pliego1, Laia Vilaplana, Roberto Güerri-Fernández

  • 1Department of Medicine, Hospital del Mar-IMIM, Universitat Autònoma de Barcelona, RETICEF, Instituto Carlos III, Catalonia, Spain, 97529@parcdesalutmar.cat.

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Summary

Osteoporosis evaluation goes beyond bone density. New techniques like finite-element analysis and microindentation offer promising clinical tools for assessing bone fragility and fracture risk.

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Area of Science:

  • Biomedical Engineering
  • Orthopedics
  • Materials Science

Background:

  • Osteoporosis is characterized by reduced bone mass and impaired bone quality, increasing fracture risk.
  • Bone quality encompasses properties from macroscopic to nanoscale levels.
  • Current clinical assessments often lack comprehensive evaluation of non-density related bone properties.

Purpose of the Study:

  • To review techniques for measuring non-density properties of bone.
  • To evaluate the clinical applicability of various bone assessment methods.
  • To highlight emerging technologies for improved fracture risk prediction.

Main Methods:

  • Review of imaging techniques: densitometry, radiography, CT scan, MRI for geometry and microarchitecture.
  • Assessment of tissue mineralization and composition: microradiography, Fourier-transform infrared spectroscopy, Raman microspectroscopy.
  • Evaluation of bone strength and material properties: finite-element analysis, microindentation.

Main Results:

  • Imaging techniques provide insights into bone geometry and microarchitecture.
  • Spectroscopic methods assess tissue composition and mineralization.
  • Finite-element analysis and microindentation directly estimate bone strength and material properties.
  • Most techniques have limited clinical utility, but finite-element analysis and microindentation show high potential.

Conclusions:

  • Comprehensive assessment of bone fragility requires evaluating non-density properties.
  • Finite-element analysis and microindentation offer advanced methods for clinical evaluation of bone strength.
  • These emerging techniques hold significant promise for improving osteoporosis diagnosis and fracture risk assessment.