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Operation technique
| Patient in supine position | 70 (69.3%) |
| Patient in prone position | 31 (30.7%) |
| Patients with closed procedure | 76 (77.6%) |
| Patients with open procedure | 22 (22.4%) |
| Number of screw osteosynthesis | 207 |
| Patients with 2 screws unilaterally | 65 (66.3%) |
| Patients with 1 screw unilaterally | 16 (16.3%) |
| Patients with 2 screws bilaterally | 10 (10.2%) |
| Patients with 1 screw bilaterally | 6 ( 6.1%) |
| Patients with 3 screws | 1 ( 1.1%) |
| Screws in S1 | 199 (96.1%) |
| Screws in S2 | 8 ( 3.9%) |
