The planned angle and the postoperative angle for each level in axial and sagittal planes. The mean navigational error in both planes is shown in column 4 and column 7. Standard deviation in parentheses
| Level | Axial | Sagittal | ||||
|---|---|---|---|---|---|---|
| Planned angle | Postop angle | Navigational error | Planned angle | Postop angle | Navigational error | |
| RL4 | 10.4° (±2.8) | 10.5° (±2.8) | 1.8° (±1.5) | 11.4° (±3.2) | 11.1° (±2.7) | 2.1° (±1.6) |
| LL4 | 9.9° (±3.9) | 10.3° (±3.2) | 2.3° (±1.7) | 9.4° (±3.1) | 10.7° (±3.9) | 3.6° (±2.5) |
| L4 | 10.2° (±3.4) | 10.4°(±2.9) | 2.1° (±1.6) | 10.3° (±3.3) | 10.9° (±3.3) | 2.8° (±2.1) |
| RL5 | 8.4° (±3.1) | 8.0° (±3.4) | 3.4° (±1.8) | 2.6° (±3.6) | 2.1° (±5.5) | 3.6° (±2.9) |
| LL5 | 7.2° (±3.5) | 7.4° (±2.7) | 2.2° (±1.8) | 0.8° (±4.1) | 0.8° (±5.4) | 2.9° (±2.4) |
| L5 | 7.8°(±3.3) | 7.7° (±3.1) | 2.7° (±1.9) | 1.6° (±3.9) | 0.6° (±5.6) | 3.2° (±2.6) |