Table 1.
Definitions and results of mal-positioned iliosacral screw and trans-iliac trans-sacral screws as per Smith grading system.
| Grade 0 | Grade 1 | Grade 2 | Grade 3 | |
|---|---|---|---|---|
| Perforation | No perforation | < 2 mm | 2–4 mm | > 4 mm |
| Angulation | < 5° | 5°–10° | 11°–15° | > 15° |
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