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Updated: Jan 25, 2026
08:36
Fragility Assessment of Bovine Cortical Bone Using Scratch Tests
Published on: November 30, 2017
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Fatigue as the missing link between bone fragility and fracture.
Claire Acevedo1,2,3, Vincent A Stadelmann4,5, Dominique P Pioletti6
1Department of Orthopaedic Surgery, University of California, San Francisco, CA, USA. claire.acevedo@utah.edu.
Nature Biomedical Engineering
|April 25, 2019
Summary
Cyclic fatigue, not falls, may cause fragility fractures in the elderly. Bone quality, not just mass, and osteocyte involvement are key factors in fracture prevention.
Area of Science:
- Bone biology
- Geriatric medicine
- Orthopedics
Background:
- Fragility fractures in the elderly are a significant clinical challenge.
- Recent evidence suggests falls may result from fractures, not cause them.
- This challenges traditional views on fracture etiology.
Purpose of the Study:
- To explore the role of cyclic fatigue in fragility fractures.
- To question the predominant role of bone mass versus bone quality.
- To investigate osteocyte involvement in bone repair.
Main Methods:
- This is a perspective piece, not an experimental study.
- Discussion based on current scientific literature and emerging research.
- Focus on theoretical and conceptual frameworks.
Main Results:
- Cyclic loading, or fatigue, may be the primary driver of progressive fractures.
- Bone quality (micro-architectural integrity) may be more critical than bone mass.
- Osteocytes are likely active participants in the bone response to fatigue.
Conclusions:
- Re-evaluating the cause of fragility fractures is necessary.
- Cyclic fatigue is a central mechanism to consider in bone fragility.
- Understanding these mechanisms can inform new prevention strategies.
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