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Related Concept Videos

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...
The Functions of the Skeletal System01:22

The Functions of the Skeletal System

The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...
Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
What is the Skeletal System?01:02

What is the Skeletal System?

Overview
Stress-Strain Diagram - Brittle Materials01:24

Stress-Strain Diagram - Brittle Materials

Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...

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Updated: May 23, 2026

Fragility Assessment of Bovine Cortical Bone Using Scratch Tests
08:36

Fragility Assessment of Bovine Cortical Bone Using Scratch Tests

Published on: November 30, 2017

Skeletal fragility definition.

Paolo Tranquilli Leali1, Francesco Muresu, Alessandro Melis

  • 1Orthopaedic Department, University of Sassari, Sassari, Italy.

Clinical Cases in Mineral and Bone Metabolism : the Official Journal of the Italian Society of Osteoporosis, Mineral Metabolism, and Skeletal Diseases
|March 31, 2012
PubMed
Summary

Understanding bone strength beyond bone mineral density (BMD) is crucial for reducing fracture risk. This review highlights biomechanical factors and how osteoporosis treatments impact bone quality, influencing fragility.

Keywords:
boneosteoporosis fracture

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Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

Area of Science:

  • Biomedical Engineering
  • Orthopedics
  • Gerontology

Background:

  • Fracture incidence increases with age and bone diseases, necessitating strategies beyond bone mineral density (BMD) assessment.
  • Bone strength is influenced by factors beyond BMD, including size, shape, micro-architecture, and tissue quality.
  • Current understanding of age-related fractures requires a deeper look into biomechanical aspects.

Purpose of the Study:

  • To review the biomechanical factors contributing to age-related fractures.
  • To explore the limitations of BMD in assessing fracture risk and treatment efficacy.
  • To examine how osteoporosis therapies affect bone quality and fragility.

Main Methods:

  • Literature review focusing on biomechanical aspects of bone strength and fracture.
  • Analysis of factors influencing bone resistance to fracture, including traumatic loading.
  • Evaluation of the impact of osteoporosis treatments on bone tissue quality and architecture.

Main Results:

  • Low BMD is a significant risk factor, but not the sole determinant of fracture risk.
  • Bone size, shape, micro-architecture, and quality are critical determinants of skeletal fragility.
  • Osteoporosis treatments can alter bone quality and architecture, affecting fragility independently of BMD changes.

Conclusions:

  • Effective fracture risk reduction requires understanding biomechanical properties and bone quality, not just BMD.
  • The effects of osteoporosis therapies on bone turnover, mineralization, and architecture significantly influence fracture risk.
  • Further research into biomechanical parameters is essential for optimizing fracture prevention and treatment strategies.