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Fracture toughness of swine cortical bone: (a) Histogram of fracture toughness of bone in LT direction. In total, 35 2-mm long scratches were carried out. (b) Histogram of fracture toughness of bone in SL direction. A total of 52 3-mm long scratches were carried out for this orientation. The value of fracture toughness is within the range reported in the scientific literature.
