Comparison of C2 pedicle morphometry between patients with and without FJP.
| Computed Tomography Measurement | Non-FJP Screw Placement (n = 60) | FJP Screw Placement (n = 8) | P Value |
| Width, mm | 7.5 ± 2.1 | 7.4 ± 1.1 | 0.88 |
| Length, mm | 32.2 ± 2.9 | 31.7 ± 1.3 | 0.59 |
| Height, mm | 7.7 ± 1.4 | 7.4 ± 1.1 | 0.48 |
| Transverse angle | 43.0° ± 3.4° | 42.3° ± 2.5° | 0.55 |
Abbreviation: FJP, facet joint penetration.
Note: All data are represented as mean ± SD.