Table 5.
Screw diameter (SD) to pedicle width (PW) ratios calculated in the current study (□ indicates studies also reporting on fixation strength and ⋄ indicates studies also reporting on breach rate).
|
Study |
Insertion Technique |
SD/PW Ratio (Vertebral Level) |
| ⋄Chan et al28 | NA | 0.96 (T1) |
| 1.02 (T2) | ||
| 1.16 (T3) | ||
| 1.19 (T4) | ||
| 1.22 (T5) | ||
| 1.14 (T6) | ||
| 1.20 (T7) | ||
| 1.22 (T8) | ||
| 1.13 (T9) | ||
| 0.95 (T10) | ||
| 0.87 (T11) | ||
| 0.91 (T12) | ||
| □Helgeson et al25 | Straightforward | 0.72 and 0.82 (T1–12) |
| ⋄Hart et al31 | Unique starting point | 0.48 (T1, T2) |
| 0.7 (T4–7) | ||
| 0.63 (T9, T10) | ||
| ⋄Fujimoto et al32 | ||
| Group 1 | NA | 0.7 (T2) |
| 0.63 (T3) | ||
| 0.86 (T8) | ||
| 0.85 (T9) | ||
| Group 2 | 0.78 (T2) | |
| 0.85 (T3) | ||
| 0.98 (T4) | ||
| 0.88 (T5) | ||
| 0.9 (T6) | ||
| 0.87 (T7) | ||
| 0.95 (T8) | ||
| 0.98 (T9) | ||
| Xie et al46 | Anatomical | 1.101 ± 0.051 (T1) |
| 1.166 ± 0.042 (T2) | ||
| 1.278 ± 0.050 (T3) | ||
| 1.586 ± 0.0112 (T4) | ||
| 1.596 ± 0.089 (T5) | ||
| 1.640 ± 0.068 (T6) | ||
| 1.444 ± 0.069 (T7) | ||
| 1.390 ± 0.066 (T8) | ||
| □Heller et al26 | NA | 0.44 (T1) |
| 0.5 (T2) | ||
| 0.55 (T3) | ||
| 0.55 (T4) | ||
| □Hongo et al27 | Anatomical | 0.86 (T5–12) |
| □Matsukawa et al28 | Anatomical | 1.08 (T9) |
| 0.96 (T10) | ||
| 0.76 (T11) | ||
| 0.71 (T12) | ||
Abbreviation: NA, not available.