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Though such a nail is mainly used to fix the joint of a rheumatic patient, if an over-load is applied to the nail under insufficient bone adhesion, a fatigue fracture is caused on it.
According to this image, as it’s possible to clearly see patterns such as striation on the fracture, we can find out that it’s a kind of fatigue fracture together with stable crack growth.
Furthermore, it’s possible to estimate the loaded condition on the pattern of the start of the fracture and the area of the end-section of it.
