Article Figures & Data
Figures
- Fig 1.
Two examples of absence of ventral ossification center of the AAA. A, Large nonossified AAA in a 2-year-old child. B, Midline cartilaginous gap at the AAA in a 12-year-old child.
- Fig 2.
Singular midline OC pattern at the AAA. A, 5-month-old child with already large midline OC and large ventrolateral synchondroses. B, A 2.5-year-old child with progressive ossification of the chondral AAA anlage from both the central OC and the lateral masses of the atlas. C, 7-year-old child with complete ossification of the AAA but still-visible ventrolateral synchondroses.
- Fig 3.
Multiple OC patterns at the AAA. A, 3-year-old child with 2 OCs paramedially located. B, A 2.5-year-old child with 3 irregular OCs within the AAA.
- Fig 4.
Ossification timetable of the anterior atlas arch.
- Fig 5.
Different aspects of the PAA. A, Normal midline synchondrosis. B, Rare paramedial posterior synchondrosis. C, Rare midline OC within the PAA.
- Fig 6.
Ossification timetable of the posterior atlas arch.
- Fig 7.
Coronal (A) and sagittal (B) view of the neonatal axis with 5 OCs. A, While both club-shaped centers of the dens are already fused at birth, a midline vertical fusion line can still be perceived. B, Smooth cartilaginous rounded CHT at the top of the dens is best appreciated on the sagittal view.
- Fig 8.
Ossification timetable of the subdental synchondrosis.
- Fig 9.
Coronal view of ossification development of the axis. Children are of the following ages (A) 30 days, (B) 5 months, (C) 1.5 years, (D) 2 years, (E) 3 years, (F) 5 years, (G) 8.5 years, and (H) 14 years.
- Fig 10.
Ossification timetable of the apicodental synchondrosis.
- Fig 11.
Sagittal view of ossification development of the axis. Children are of the following ages: (A) 30 days, (B) 3 months, (C) 3 years, (D) 5 years, (E) 6.5 years, (F) 8 years, (G) 13 years, and (H) 16 years.
- Fig 12.
Rare posterior ossification of the CHT resembled a dislocated fragment.
- Fig 13.
Large ossiculum terminale in an 8-year-old child and incomplete ossification of the ADS.
Tables
Number of CT examinations per age category
Age (yrs) Patients 0 46 1 38 2 35 3 36 4 31 5 31 6 25 7 25 8 33 9 28 10 30 11 26 12 39 13 41 14 41 15 35 16 6 17 4 Total 550
