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Table 1 Demographic data in atlantoaxial dislocation cases

From: Comparison of imaging parameters pre- and post- reductive procedure for atlantoaxial dislocation via posterior fixation using pedicle screw and rod: a cross-sectional study

Patient ID Etiology Anterior release Fixation
1 Unknown N/A C1–2
2 Os odontoideum N/A C1–2
3 Unknown N/A C1–2
4 Rheumatoid arthritis N/A C1–2
5 Rheumatoid arthritis N/A C1–2
6 Atlas occipitalization, C2–3 fusion N/A C0–3
7 Rheumatoid arthritis N/A C1–2
8 Ankylosing spondylitis Retropharyngeal C1–2
9 Other malformation, posterior arch defect N/A C1–2
10 Atlas occipitalization N/A C0–2
11 Unknown N/A C1–2
12 Atlas occipitalization, C2–3 fusion N/A C0–3
13 Atlas occipitalization, C2–3 fusion N/A C0–3
14 Atlas occipitalization, C2–3 fusion N/A C0–3
15 Unknown N/A C0–2
16 Os odentium N/A C1–2
17 Atlas occipitalization, C2–3 fusion N/A C0–3
18 Atlas occipitalization, C2–3 fusion Transoral C0–3
19 Atlas occipitalization N/A C0–2
20 Atlas occipitalization N/A C0–2
21 Os odontoideum N/A C1–2
22 Odontoid fracture nonunion N/A C1–2
23 Unknown N/A C1–2
24 Unknown N/A C1–2
25 Atlas occipitalization N/A C0–2
26 Atlas occipitalization Retropharyngeal C0–2
27 Atlas occipitalization N/A C0–2
28 Os odontoideum N/A C1–2
29 Os odontoideum N/A C1–2
30 Atlas occipitalization N/A C0–2
31 Atlas occipitalization, C2–3 fusion Retropharyngeal C0–3
32 Os odontoideum N/A C1–2
33 Os odontoideum N/A C1–2
34 Other malformation, C2–3 fusion N/A C1–2
35 Atlas occipitalization, C2–3 fusion Transoral C0–3
36 Atlas occipitalization, C2–3 fusion N/A C0–3
37 Atlas occipitalization, C2–3 fusion Retropharyngeal C0–4