Table 1 Fifteen complex atlantoaxial fractures undergoing posterior pedicle screw fixation
Case | Sex/age | Dickman type | Injury mechanism | Pre-ADI (mm) | Pre-C2/C3 angulation (°) | Pre-nerve injury | Time to surgery (day) | Time of surgery (min) | Blood loss (ml) | Hospital stay (day) | Fusion time (month) | Fracture healing (month) | Post-nerve injury | Post-ADI (mm) | Pre-C2/C3 angulation (°) | Pre-JOA | Post-JOA | Recovery rate (%) | Follow-up |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | M/38 | C1 (posterior ring) -II odontoid fractures | Falling from a height | 5 | 7 | C | 3 | 120 | 300 | 14 | 6 | 4.5 | E | 3 | 5 | 7 | 16 | 90 | 36 |
2 | M/30 | C1 (Jefferson) -hangman's fractures | Traffic accidents | 4 | 27 | D | 5 | 78 | 460 | 12 | 6 | 6 | E | 3 | 11 | 8 | 16 | 88.9 | 48 |
3 | M/44 | C1 (Jefferson) -II odontoid fractures | Traffic accidents | 7 | 7 | C | 14 | 132 | 700 | 12 | 6 | 5 | E | 3 | 3 | 7 | 17 | 100 | 20 |
4 | M/55 | C1 (anterior ring) -hangman's fractures | Falling down | 4 | 19 | D | 2 | 90 | 260 | 12 | 6 | 6 | E | 3 | 7 | 8 | 16 | 88.9 | 56 |
5 | M/46 | C1 (anterior ring) -hangman's fractures | Traffic accidents | 4 | 15 | C | 5 | 100 | 800 | 14 | 6 | 6 | E | 3 | 9 | 7 | 17 | 100 | 52 |
6 | M/55 | C1 (anterior ring) -hangman's fractures | Falling from a height | 4 | 30 | D | 7 | 110 | 320 | 12 | 9 | 9 | E | 4 | 9 | 7 | 17 | 100 | 24 |
7 | M/46 | C1 (anterior ring) -II odontoid fractures | Falling from a height | 5 | 5 | D | 5 | 150 | 900 | 16 | 9 | 9 | E | 2 | 3 | 7 | 16 | 90 | 20 |
8 | M/27 | C1 (lateral mass) -II odontoid fractures | Traffic accidents | 5 | 3 | C | 10 | 84 | 520 | 12 | 6 | 3 | E | 3 | 3 | 8 | 17 | 100 | 48 |
9 | M/38 | C1 (lateral mass) -hangman's fractures | Traffic accidents | 5 | 13 | D | 14 | 96 | 280 | 10 | 9 | 4.5 | E | 3 | 5 | 10 | 17 | 100 | 58 |
10 | F/48 | C1 (Jefferson) -II odontoid fractures | Traffic accidents | 7 | 5 | C | 3 | 160 | 720 | 14 | 6 | 6 | E | 4 | 3 | 8 | 16 | 88.9 | 18 |
11 | F/48 | C1 (anterior ring) -II odontoid fractures | Traffic accidents | 5 | 7 | D | 7 | 68 | 280 | 14 | 6 | 6 | E | 3 | 3 | 7 | 17 | 100 | 48 |
12 | F/28 | C1 (Jefferson) -II odontoid fractures | Falling from a height | 9 | 7 | C | 3 | 106 | 410 | 14 | 6 | 6 | E | 3 | 3 | 7 | 16 | 90 | 24 |
13 | F/50 | C1 (anterior ring) -II odontoid fractures | Traffic accidents | 6 | 5 | D | 3 | 114 | 560 | 14 | 9 | 9 | E | 3 | 3 | 6 | 16 | 90.9 | 24 |
14 | F/30 | C1 (posterior ring) -II odontoid fractures | Falling from a height | 6 | 7 | C | 5 | 98 | 680 | 18 | 6 | 6 | D | 3 | 5 | 7 | 13 | 60 | 36 |
15 | F/37 | C1 (anterior ring) -II odontoid fractures | Traffic accidents | 7 | 9 | C | 3 | 128 | 430 | 12 | 6 | 6 | D | 2 | 3 | 5 | 9 | 33.3 | 36 |