Variable | N = 76 |
---|---|
Patients with pedicle screw pullout | 26 (34.2) |
Age, years | 69.2 ± 14.4 |
Sex | |
Male | 47 (61.8) |
Female | 29 (38.2) |
Body mass index | 22.0 ± 3.4 |
Operating time, min | 174.3 ± 85.7 |
Estimated blood loss, mL | 225.3 ± 245.8 |
Disease | |
Injury | 55 (72.4) |
Metastasis | 15 (19.7) |
Spondylitis | 6 (7.9) |
Segments fused, n | 4.8 ± 1.2 |
Surgical procedure | |
PPS | 57 (75.0) |
Open | 19 (25.0) |
Use of a hook system | 6 (7.9) |
Preoperative complications | |
DISH | 28 (36.8) |
Osteoporosis | 33 (43.4) |
Rheumatoid arthritis | 2 (2.6) |
Diabetes | 16 (21.1) |
Asthma | 6 (7.9) |
Requirement for dialysis | 3 (3.9) |
Smoking | 12 (15.8) |
Type of rod | |
Titanium | 60 (78.9) |
Cobalt chrome | 16 (21.1) |
Screw designs | |
Mixed thread | 15 (19.7) |
Dual thread | 61 (80.3) |
Degree of sagittal alignment between the UIV and LIV (kyphotic angle) | |
Intraoperative CBCT, deg | 6.2 ± 23.5 |
Postoperative CT, deg | 5.8 ± 23.5 |
Alignment change in the sagittal plane from CBCT to CT, deg | 2.1 ± 1.5 |
Screw density, screws/level | 1.69 ± 0.23 |