Table 1.
A summary of the pedicle screw grades
| Grade | Number of pedicle screws |
|---|---|
| Ravi grade | |
| Grade 1 | 206 |
| Grade 2 | 2 |
| Grade 3 | 0 |
| Grade 4 | 0 |
| Gertzbein grade | |
| A | 206 |
| B | 2 |
| C | 0 |
| D | 0 |
| Zdichavsky score | |
| IA | 208 |
| IB | 0 |
| II A/B | 0 |
| III A/B | 0 |
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