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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...
The Bone Matrix01:18

The Bone Matrix

Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in acid or...
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.
Spongy Bone01:09

Spongy Bone

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).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
Bone Remodeling01:40

Bone Remodeling

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.
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...

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Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model
06:59

Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model

Published on: September 8, 2023

[Bone microarchitecture].

Daniel Chappard1

  • 1Inserm U 922, LHEA, IRIS-IBS Institut de Biologie en Santé CHU d'Angers, 49933 Angers. daniel.chappard@univ-angers.fr

Bulletin De L'Academie Nationale De Medecine
|November 4, 2011
PubMed
Summary
This summary is machine-generated.

Bone microarchitecture, crucial for skeletal health, is influenced by mechanical stress. This review covers 2D and 3D methods for evaluating bone structure, aiding in understanding bone diseases like osteoporosis.

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Area of Science:

  • Orthopedics and Bone Biology
  • Biomaterials and Tissue Engineering
  • Medical Imaging and Diagnostics

Background:

  • Bone mass and structure are dynamically regulated by modeling and remodeling processes throughout life.
  • Trabecular bone's anisotropic network of plates and rods aligns with stress lines, following Wolff's Law.
  • Mechanical stresses significantly influence the trabecular microarchitecture of skeletal bones.

Purpose of the Study:

  • To review current knowledge on bone microarchitecture and its implications in bone diseases.
  • To discuss the limitations of existing clinical methods for assessing bone microarchitecture.
  • To highlight advancements in both 2D and 3D histological evaluation techniques for bone structure.

Main Methods:

  • Bone histomorphometry with advanced algorithms for 2D trabecular analysis (thickness, connectivity).
  • Non-destructive 3D imaging techniques including X-ray microtomography (micro CT), microMRI, and synchrotron devices.
  • Integration of multiple independent techniques for comprehensive microarchitecture parameter assessment.

Main Results:

  • Trabecular microarchitecture is intricately linked to mechanical loading and bone health.
  • 2D histomorphometry provides detailed insights into trabecular characteristics.
  • 3D imaging methods offer non-destructive, volumetric assessment of bone microarchitecture.

Conclusions:

  • Accurate assessment of bone microarchitecture requires a combination of 2D and 3D evaluation techniques.
  • Understanding bone microarchitecture is vital for diagnosing and managing bone diseases like osteoporosis.
  • Technological advancements are improving the ability to non-destructively evaluate bone structure in vivo and ex vivo.