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Tensile and compressive properties of cancellous bone
1Biomechanics Laboratory, Orthopaedic Hospital, University of Aarhus, Denmark.
Journal of Biomechanics
|January 1, 1991
Summary
Trabecular bone exhibits similar stiffness in tension and compression. However, its strength and ability to withstand deformation are significantly greater under tensile loading compared to compressive loading.
Area of Science:
- Orthopedics
- Biomaterials Science
- Mechanical Engineering
Background:
- Trabecular bone, a porous biological material, is crucial for skeletal integrity.
- Understanding its mechanical behavior under different loading conditions is vital for predicting fracture risk and designing implants.
Purpose of the Study:
- To investigate the relationship between the mechanical properties of human trabecular bone in tension and compression.
- To compare Young's modulus, strength, ultimate strain, and work to failure under tensile and compressive loads.
Main Methods:
- Non-destructive testing of the same trabecular bone specimens in both tension and compression.
- Subsequent destructive testing in either tension or compression after random allocation.
- Analysis of Young's modulus, strength, ultimate strain, and work to failure.
Main Results:
- Young's modulus showed no significant difference between tensile and compressive testing.
- A strong positive correlation (R = 0.97) was observed for Young's modulus values.
- Strength, ultimate strain, and work to failure were significantly higher in tensile testing compared to compressive testing.
Conclusions:
- Trabecular bone's stiffness is consistent in tension and compression.
- Tensile loading results in superior strength and energy absorption compared to compressive loading.
- These findings have implications for understanding bone fragility and biomechanical load bearing.