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(a) FE SEM 700x, CHO incus bone resorption bay at higher magnification, osteoclast snake trail pathway is visible (arrows). At the center of the resorption bay, a small promontory rises being relatively resistant to resorption. (b) FE SEM, 600x, osteoclastic resorption bay on osteoporotic human femur neck (arrows), they are unequivocally of osteoclast origin and are undistinguishable from those in (a).
