Table 2 Surgical parameters and feasibility of different kinds of simulated osteotomy
From: Modified C7 pedicle subtraction osteotomy for the correction of cervicothoracic kyphosis
tPSO | VCD | mPSO | |||||||
|---|---|---|---|---|---|---|---|---|---|
Male | Female | All patients | Male | Female | All patients | Male | Female | All patients | |
Angle corrected (degree, mean ± SD) | 43.4 ± 4.5 | 41.2 ± 3.7 | 41.9 ± 4.3 | 73.0 ± 7.1 | 69.4 ± 4.3 | 71.7 ± 5.7 | 60.1 ± 6.2 | 58.7 ± 5.4 | 59.1 ± 4.7 |
Resected length of C6 inferior facet (mm, mean ± SD) | 3.3 ± 2.0 | 3.2 ± 1.7 | 3.2 ± 1.3 | 5.7 ± 2.3 | 5.1 ± 1.7 | 5.4 ± 2.0 | 4.7 ± 2.1 | 4.2 ± 1.1 | 4.5 ± 1.6 |
Resected length of T1 superior facet (mm, mean ± SD) | 5.5 ± 2.5 | 5.3 ± 2.2 | 5.4 ± 2.2 | 7.5 ± 2.8 | 6.9 ± 2.5 | 7.2 ± 2.2 | 6.5 ± 2.6 | 6.2 ± 1.6 | 6.4 ± 2.1 |
Feasibility of simulated osteotomy | |||||||||
No. of patients with C6/T1 pedicles impinged | 3 | 4 | 7 | 33 | 18 | 51 | 10 | 9 | 19 |
No. of patients with C7/C8 nerve roots compressed | 5 | 3 | 8 | 28 | 15 | 43 | 13 | 4 | 17 |
No. of simulated osteotomies considered to be successful | 72 | 34 | 106(88.3%) | 26 | 12 | 38(31.7%) | 59 | 28 | 87(72.5%) |