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Bone Disorders

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...

Spongy Bone

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 as Supporting Connective Tissue

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...

Compact Bone

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 Matrix

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 Structure

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: Jun 23, 2026

Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model

Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model

Published on: September 8, 2023

[Bone quality].

¹Division of Radiology, Nagasaki University Hospital.

Nihon Rinsho. Japanese Journal of Clinical Medicine

|May 13, 2009

Summary

Assessing bone quality for osteoporosis treatment is crucial. Advanced imaging techniques improve in vivo evaluation of bone structure and biomechanical properties, aiding fracture risk assessment.

Area of Science:

Orthopedics and Bone Health
Medical Imaging Technology
Biomechanical Engineering

Context:

Osteoporosis treatment necessitates a focus on bone quality, yet in vivo assessment remains limited to bone geometry and trabecular microstructure.
Hip Structure Analysis (HSA) offers a method to evaluate proximal femur geometry and biomechanical properties using 2D DXA data.
Recent advancements in high-resolution CT and MR imaging enable in vivo assessment of trabecular microstructure.

Purpose:

To explore the current limitations and advancements in in vivo bone quality assessment for osteoporosis.
To highlight the role of Hip Structure Analysis (HSA) in evaluating bone geometry and biomechanics.
To discuss the potential application of advanced imaging techniques in assessing fracture risk and treatment efficacy.

Summary:

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Last Updated: Jun 23, 2026

Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model

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Published on: September 8, 2023

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

Fragility Assessment of Bovine Cortical Bone Using Scratch Tests

Fragility Assessment of Bovine Cortical Bone Using Scratch Tests

Published on: November 30, 2017

In vivo assessment of bone quality for osteoporosis treatment is evolving beyond traditional geometry and microstructure analysis.
Hip Structure Analysis (HSA) utilizes DXA data for evaluating femoral geometry and biomechanics.
High-resolution CT and MR imaging are emerging tools for in vivo trabecular microstructure assessment, despite resolution limitations.

Impact:

Improved in vivo assessment of bone quality can lead to more personalized and effective osteoporosis treatments.
Advanced imaging techniques hold promise for better prediction of fracture risk.
These technologies may enhance the evaluation of anti-osteoporotic agent efficacy, guiding clinical decision-making.