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Sealed osteons are unusual variants of secondary osteons that have received little attention, especially in non‐human bones. Sealed osteons are characterized by central canals that are plugged with bone tissue. As with other variants of secondary osteons (e.g. drifting, dumbbell, multi‐canal), understanding how and why sealed osteons form can shed light on the mechanisms that regulate normal bone...
Mechanical testing studies by Krauss et al. (2009) and Gupta et al. (2013) suggest that the extraordinary toughness of antler bone is primarily achieved by intrinsic/nanostructural mechanisms instead of extrinsic/microstructural mechanisms. However, this conclusion is based on data from extremely small specimens from one antler loaded only in tension, which impedes discernment of the relative importance...
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