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The biomechanical tests performed in each experimental group
| Tests performed | Group | Pedicles | Screw type |
|---|---|---|---|
| Turning-back test | A1 | 20 | EPS vs USS |
| A2 | 20 | EPS vs Tenor | |
| A3 | 20 | EPS vs CDH | |
| Pull-out test | B1 | 20 | EPS vs USS |
| B2 | 20 | EPS vs Tenor | |
| B3 | 20 | EPS vs CDH | |
| Revision test (6.5×40 mm) | C1 | 10 | CDH |
| C2 | 10 | USS | |
| C3 | 10 | Tenor | |
| C4 | 10 | EPS | |
| Revision test (7.0×40 mm) | C5 | 20 | EPS vs CDH |
| C6 | 20 | EPS vs USS |
