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Stress fractures in the elderly: different pathogenetic features compared with young patients
Riccardo Iundusi1, Alessandro Scialdoni, Mario Arduini
1Department of Orthopedics and Traumatology, "Tor Vergata" University of Rome, "Policlinico Tor Vergata" Foundation, V.le Oxford 81, 00133, Rome, Italy, riccardo.iundusi@uniroma2.it.
Aging Clinical and Experimental Research
|September 19, 2013
Summary
Stress fractures in young athletes result from bone fatigue, while elderly individuals experience insufficiency fractures due to metabolic bone disease and muscle atrophy. Both conditions affect lower limb bone strength.
Area of Science:
- Orthopedics
- Sports Medicine
- Geriatrics
Background:
- Stress fractures commonly affect the lower limbs due to repetitive submaximal stresses.
- Young athletes, military personnel, and the elderly with metabolic bone diseases are particularly susceptible.
- Heterogeneity in patient populations suggests diverse underlying pathogenic mechanisms.
Purpose of the Study:
- To differentiate the pathogenic mechanisms of stress fractures in young individuals versus elderly patients.
- To elucidate the roles of bone fatigue, metabolic bone disease, and muscle function in fracture development.
Main Methods:
- Comparative analysis of fracture mechanisms based on patient demographics and physiological conditions.
- Review of biomechanical factors including bone tissue integrity and muscle fatigue/atrophy.
Main Results:
- In young individuals, intact but fatigued bone fails under chronic stress, leading to 'fatigue' fractures.
- Elderly patients develop 'insufficiency' fractures due to altered bone metabolism, reduced biomechanical strength, and muscle atrophy.
Conclusions:
- Pathogenesis of stress fractures differs significantly between young and elderly populations.
- Fatigue fractures in the young are linked to bone's inability to withstand chronic stress, while insufficiency fractures in the elderly stem from metabolic and structural bone degradation.
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