Abstract
Microcracks in bone are assumed to increase the risk of bone fractures and to stimulate bone remodeling. In order to clarify the process of the insidious micro bone fractures, it may be important to know the biomechanical changes of bone properties surrounding the microdamages. In this paper, a crack whose opening is filled with other tissue was detected in the femur sample of young beagle dog. To distinct the kind of tissue, the comparison of material properties with some tissues and materials in the sample was performed attempted using the scanning acoustic microscope (SAM). As a result, the tissue between the maicrocrack was seemed to be callus. This means that the restoration process of microcracks proceeds in same as the process in general bone fracture with the appearance of callus.
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