Table 1 Fracture classification and types of fracture
Fracture classification | Number | |
 Atlas fractures (all) | 24 | |
  Gehweiler type 1 | 7 | |
  Gehweiler type 2 | 3 | |
  Gehweiler type 3 | 13 | |
  Gehweiler type 4 | 0 | |
  Gehweiler type 5 | 0 | |
  Unknown | 1 | |
 Odontoid fractures (all) | 88 | |
  Anderson/D’Alonzo type 1 | 0 | |
  Anderson/D’Alonzo type 2 | 69 | |
  Anderson/D’Alonzo type 3 | 13 | |
  Unknown | 6 | |
 Traumatic spondylolisthesis of axis (all) | 7 | |
  Hangman’s fracture | 2 | |
  Unknown | 5 | |
Type of fracture | OCF | AAF |
 Atlas fractures* | ||
  Gehweiler type 1 | 0 | 0 |
  Gehweiler type 2 | 0 | 0 |
  Gehweiler type 3 | 3 | 0 |
  Gehweiler type 4 | 0 | 0 |
  Gehweiler type 5 | 0 | 0 |
 Odontoid fractures° | ||
  Anderson/D’Alonzo type 1 | 0 | 0 |
  Anderson/D’Alonzo type 2 | 32 | 37 |
  Anderson/D’Alonzo type 3 | 4 | 9 |
  Unknown | 0 | 6 |
 Combined fractures | ||
  Odontoid fracture + atlas fracture | 13 | 8 |
  Odontoid fracture + traumatic Spondylolisthesis of axis | 5 | 2 |