Table 2 Previous reports regarding operative time per screw and radiation exposure time.
Study and Year | Case No. | Method | Mean Age | Operative Time Per Screw(min) | Radiation Exposure Time(min) |
|---|---|---|---|---|---|
Nork et al.15 | 13 | Inlet, outlet, lateral view | 39 | 48 | 126 |
Tonetti et al.16 | 30 | Inlet, outlet, lateral view | 34.7 | 35 | 62 |
4 | Computer asisted group | 48.5 | 50 | 21 | |
Mosheiff et al.17 | 29 | Computerized navigation | 16–66 | 10~15(system preparatory time) | — |
Peng et al.4 | 18 | One C-arm(n = 10) | 28.5 | 45 | 342 |
Two C-arm(n = 8) | 31 | 16 | 270 | ||
Zwingmann et al.18 | 24 | Navigation system | 35 ± 23 | 72 ± 16 | 63 ± 15 |
32 | Inlet, outlet, lateral view | 46 ± 20 | 69 ± 38 | 141 ± 69 | |
Gras et al.19 | 44 | 2D navigation system | — | 62 ± 4 | 123 ± 12 |
Kadir et al.20 | 7 | Inlet, outlet, lateral view | 31 | — | 138 |
10 | Sacral pedicles view | 30 | — | 52 | |
Our study | |||||
Normal sacrum group | 31 | Sacral pedicles axial view | 37.8 ± 9.9 | 14 ± 5 | 50 ± 9 |
Dysmorphic sacrum group | 27 | 42.4 ± 10.5 | 16 ± 4 | 53 ± 12 |
