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Fractography has not been fully developed as a useful technique in assessing failure mechanisms of bone. While fracture surfaces of osteonal bone have been explored, this may not apply to conventional mechanical testing of mouse bone. Thus, the focus of this work was to develop and evaluate the efficacy of a fractography protocol for use in supplementing the interpretation of failure mechanisms in...
The relationship between microdamage accumulation and bone fragility is not well understood. Previous work has demonstrated a positive relationship between microdamage and age in human cortical bone. Prior investigations have also demonstrated that fracture toughness decreases with age in the same bone. Based on these findings, the objective of this study was to test the hypothesis that a decrease...
The influence of porosity, osteon density, osteonal area, osteonal lamellar area, osteon size, and haversian canal size on the tension and shear fracture toughness, that is, the mode I and mode II strain energy release rate (G Ic and G IIc ), respectively, were investigated for the human femur and the tibia. The results suggest that porosity and osteon density were...
Increased bone fragility and osteoporotic fracture in human bone has been attributed to the accumulation of microdamage. According to Martin and Burr (J Biomech 15:137-139; 1982), microcracks from interstitial bone propagate to the cement line or concentric lamellae and debond or separate the Haversian canal from the surrounding bone which leads to repair of the damaged region. If this is true,...
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