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Fragility Assessment of Bovine Cortical Bone Using Scratch Tests
Published on: November 30, 2017
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Fragility Assessment of Bovine Cortical Bone Using Scratch Tests
Kavya Mendu1, Amrita Kataruka1, Jasmine Puthuvelil1
1Department of Civil and Environmental Engineering, University of Illinois at Urbana Champaign.
Journal of Visualized Experiments : Jove
|December 30, 2017
Summary
This study introduces micro scratch testing to evaluate bone fracture resistance at microscopic and mesoscopic levels. This method enhances understanding of bone fragility beyond macroscopic assessments, crucial for aging and osteoporosis research.
Area of Science:
- Biomaterials Science
- Mechanics of Materials
- Orthopedic Research
Background:
- Bone is a hierarchical material susceptible to fracture due to aging and diseases like osteoporosis.
- Current fracture assessment methods are limited to macroscopic scales, hindering a comprehensive understanding of bone mechanical performance.
- There is a critical need for novel techniques to evaluate bone fracture resistance across multiple hierarchical levels.
Purpose of the Study:
- To investigate the fracture resistance of bone at microscopic and mesoscopic length scales.
- To develop and apply micro scratch testing combined with nonlinear fracture mechanics for bone fracture assessment.
- To account for the inherent heterogeneity of bone microstructure in fracture toughness evaluation.
Main Methods:
- Utilized micro scratch tests on bovine cortical bone specimens.
- Employed nonlinear fracture mechanics principles to analyze fracture behavior.
- Conducted a large number of tests (102) following a meticulous experimental protocol.
- Performed tests in the short longitudinal orientation to capture specific mechanical properties.
Main Results:
- Successfully assessed the fracture resistance of bone from the microscopic to the mesoscopic scales.
- Demonstrated the feasibility of using micro scratch tests for evaluating bone fracture toughness.
- Provided insights into the fracture behavior of cortical bone considering its microstructural heterogeneity.
Conclusions:
- Micro scratch testing offers a viable method for assessing bone fracture resistance at finer scales.
- This approach expands the scope of laboratory and clinical studies on bone mechanical performance.
- Understanding fracture at multiple hierarchical levels is essential for addressing bone fragility and developing effective treatments.
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