Table 4.
Pedicle Screw Perforation Rates by Vertebral Level (%)
| C2 | C3 | C4 | C5 | C6 | C7 | |
|---|---|---|---|---|---|---|
| Grade 3 | 6.7 | 8.2 | 14.0 | 3.1 | 2.4 | 2.2 |
| Grade 2+3 | 6.7 | 18.4 | 32.6 | 21.9 | 9.8 | 4.4 |
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