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The first bone formed in response to orthodontic loading is

# The first bone formed in response to orthodontic loading is:
a) Bundle bone
b) Composite bone
c) Lamellar bone
d) Woven bone



The correct answer is D. Woven bone.

When a force is applied, there is stretching of the periodontal fibres on the tension side with raised vascualarity. This raised vascularity causes mobilization of fibroblasts and osteoblasts into that area, which form osteoid. This lightly calcified bone in due course of time matures to form woven bone.

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