Axis

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Initial posting by: Elad Levy

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1. Apical ossification center

2. Forms @ 7 yrs, fuses @ 12 yrs

3. If fails to form ~ hypoplastic dens

4. If fails to fuse ~ Ossiculum terminale persistence

Neural central synchondrosis

1. Fuses at 3-6 yrs

2. If fails to fuse ~ Os odontoid

3. Differentiate later in life between Os odontoid vs. dens fracture

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