Table 2.
Absolute mean deviations from the preoperative sagittal mechanical leg axis in supracondylar rotational osteotomies
| Angulation Error of the Osteotomy Plane | Plane | Error in the Sagittal Leg Axis Alignment per Rotation | ||||
|---|---|---|---|---|---|---|
| 5° | 10° | 15° | 20° | 30° | ||
| +/− 5° | Sagittal | 0.1° ± 0.1° | 0.3° ± 0.2° | 0.4° ± 0.3° | 0.6° ± 0.4° | 1.0° ± 0.6° |
| Frontal | 0.4° ± 0.0° | 0.7° ± 0.1° | 1.0° ± 0.2° | 1.3° ± 0.2° | 2.1° ± 0.7° | |
| +/− 10° | Sagittal | 0.2° ± 0.2° | 0.5° ± 0.4° | 0.8° ± 0.7° | 1.1° ± 0.9° | 2.0° ± 1.2° |
| Frontal | 0.7° ± 0.1° | 1.4° ± 0.2° | 2.0° ± 0.3° | 2.6° ± 0.4° | 3.7° ± 0.8° | |
| +/− 15° | Sagittal | 0.4° ± 0.3° | 0.7° ± 0.7° | 1.2° ± 1.0° | 1.7° ± 1.3° | 3.0° ± 1.9° |
| Frontal | 1.0° ± 0.1° | 2.0° ± 0.3° | 3.0° ± 0.4° | 3.9° ± 0.6° | 5.6° ± 1.1° | |
| +/− 20° | Sagittal | 0.5° ± 0.3° | 1.0° ± 0.8° | 1.6° ± 1.2° | 2.3° ± 1.6° | 4.1° ± 2.3° |
| Frontal | 1.4° ± 0.2° | 2.7° ± 0.3° | 4.0° ± 0.6° | 5.2° ± 0.8° | 7.4° ± 1.4° | |
| +/− 30° | Sagittal | 0.7° ± 0.6° | 1.3° ± 1.3° | 2.2° ± 1.9° | 3.2° ± 2.5° | 5.6° ± 3.7° |
| Frontal | 2.0° ± 0.2° | 3.9° ± 0.5° | 5.8° ± 0.8° | 7.6° ± 1.2° | 11.0° ± 2.0° | |
Deviations greater than 2° (mean value plus standard deviation) have been marked bold.