After bone fracture, primary healing will show which of these features:
Correct Answer: Fracture line disappears very soon radiographically.
Description: Primary or direct healing with rigid fixation of bone segments prevents any interfragmentary mobility and causes bone healing where no callus forms. The bones instead go on to heal by a process of haversian remodeling. Histologically, osteoclasts cross the fracture gap and are followed by blood vessels and osteoblasts. New bone is laid down by the osteoblasts, forming osteons which cross the gap and impart microscopic points of bony union to the fracture. A remodeling phase then converts the entire area to morphologically normal bone.
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