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• W4311447029 abstract "It has been suggested that adverse changes in bone quality due to the accumulation of advanced glycation end-products (AGEs) may play a role in the increased skeletal fragility. These non-enzymatic glycation mediated crosslinks are caused due to the presence of sugars in the extracellular space and can be induced in-vitro. AGEs exist naturally in bone, but with diseases such as type-2 diabetes, they are found at higher levels. While previous studies have examined the relationships between AGE accumulation and some mechanical properties, there is a lack of understanding of how AGE accumulation affects the fracture mechanics behaviour of bone tissue at fall-related loading rates. The objective of this study was to investigate the relationship between AGE accumulation and the fracture mechanics of cortical bone tissue. An in vitro glycation model was used to simulate diabetic conditions in twenty anatomically adjacent pairs of bone from a single bovine femur, which reduced the possibility of inter-specimen variability. Mechanical characterisation was carried out using 3-point bend, fracture toughness and nanoindentation testing, while bone composition was analysed by quantifying the accumulation of fluorescent AGEs. Under three-point bend testing, it was found that the yield stress, ultimate flexural strength, and secant modulus of the glycated samples were significantly higher than the controls. Furthermore, fracture toughness testing showed that the critical fracture toughness was increased by 16% in glycated samples compared to controls. These results provide no evidence that AGEs alone play a role in bone fragility at fall-related loading rates, with AGE accumulation actually found to enhance several pre- and post-yield properties of the tissue." @default.
• W4311447029 created "2022-12-26" @default.
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• W4311447029 date "2023-02-01" @default.
• W4311447029 modified "2023-10-16" @default.
• W4311447029 title "An investigation on the effects of in vitro induced advanced glycation end-products on cortical bone fracture mechanics at fall-related loading rates" @default.
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• W4311447029 doi "https://doi.org/10.1016/j.jmbbm.2022.105619" @default.
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