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Related Concept Videos

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 as Supporting Connective Tissue01:23

Bone as Supporting Connective Tissue

Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
Bone Matrix
Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. The organic matrix is similar to the matrix material found in other connective tissues, including some amount of collagen and elastic fibers. This gives strength and flexibility to the tissue. The inorganic matrix consists of mineral salts— mostly calcium salts— that give the...
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.
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 Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone Remodeling and Repair01:31

Bone Remodeling and Repair

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...

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Related Experiment Video

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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 quality issues an matrix properties in OP cancellous bone.

P Zioupos1, R Cook, A M Coats

  • 1Department of Materials and Applied Science, Cranfield University, Shrivenham, UK. p.zioupos@cranfield.ac.uk

Studies in Health Technology and Informatics
|April 25, 2008
PubMed
Summary
This summary is machine-generated.

Osteoporosis (OP) involves bone density loss and changes in bone matrix composition and hardness. This study reveals that as bone porosity increases in OP, mineral content and trabecular hardness also change, indicating qualitative bone alterations.

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Area of Science:

  • Biomaterials Science
  • Orthopedics
  • Bone Biology

Background:

  • Osteoporosis (OP) is traditionally characterized by reduced bone mass.
  • Emerging evidence suggests OP also affects bone matrix quality.
  • Understanding these qualitative changes is crucial for comprehensive OP management.

Purpose of the Study:

  • To investigate the relationship between bone composition, density, mineral content, and hardness in osteoporotic cancellous bone.
  • To correlate tissue-level and trabecular-level properties in OP bone.

Main Methods:

  • Analysis of cancellous bone from osteoporosis patients.
  • Measurement of bone composition, density, and mineral content at the tissue level.
  • Assessment of hardness at the individual trabecular level.
  • Statistical correlation analysis between porosity, mineral content, and hardness.

Main Results:

  • Increased bone porosity (Bone volume/Tissue volume) in OP is significantly correlated with altered mineral content.
  • Trabecular hardness values show a direct relationship with changes in bone composition and porosity.
  • Osteoporotic bone exhibits both quantitative (mass) and qualitative (matrix) degradations.

Conclusions:

  • Osteoporosis is characterized by complex changes extending beyond bone mass to include significant alterations in bone matrix quality.
  • The study establishes a link between porosity, mineral content, and mechanical properties (hardness) in OP bone.
  • These findings highlight the need for therapeutic strategies addressing both bone quantity and quality in osteoporosis treatment.