TABLE A2.
Inclination of the Osteotomy When the Derotation Angle and Desired Change on the Frontal Axis Are Knowna
| Change on Coronal Axis | Derotationb | ||||||
|---|---|---|---|---|---|---|---|
| 10° | 15° | 20° | 25° | 30° | 35° | 40° | |
| 1.0° | 5.8 | 3.9 | 2.9 | 2.4 | 2.0 | 1.7 | 1.6 |
| 1.5° | 8.7 | 5.8 | 4.4 | 3.6 | 3.0 | 2.6 | 2.3 |
| 2.0° | 11.6 [0.2] | 7.8 | 5.9 | 4.7 [0.4] | 4.0 | 3.5 | 3.1 [0.7] |
| 2.5° | 14.5 | 9.7 | 7.3 | 6.0 | 5.0 | 4.4 | 3.9 |
| 3.0° | 17.5 | 11.7 | 8.8 | 7.1 | 6.0 | 5.2 | 4.7 |
| 3.5° | 20.6 | 13.6 | 10.3 | 8.3 | 7.0 | 6.1 | 5.4 |
| 4.0° | 23.7 [0.3] | 15.6 | 11.8 | 9.5 [0.9] | 8.0 | 7.0 | 6.2 [1.4] |
| 4.5° | 26.9 | 17.6 | 13.3 | 10.7 | 9.0 | 7.9 | 7.0 |
| 5.0° | 30.1 | 19.7 | 14.8 | 11.9 | 10.0 | 8.7 | 7.8 |
| 5.5° | 33.5 | 21.7 | 16.3 | 13.1 | 11.0 | 9.6 | 8.6 |
| 6.0° | 37.0 [0.4] | 23.8 | 17.8 | 14.3 [1.3] | 12.1 | 10.5 | 9.4 [2.2] |
| 6.5° | 40.7 | 26.0 | 19.3 | 15.5 | 13.1 | 11.4 | 10.1 |
| 7.0° | 44.6 | 28.1 | 20.9 | 16.8 | 14.1 | 12.3 | 10.9 |
| 7.5° | 48.7 | 30.3 | 22.4 | 18.0 | 15.1 | 13.1 | 11.7 |
| 8.0° | 53.3 [0.4] | 32.5 | 24.0 | 19.2 [1.7] | 16.2 | 14.0 | 12.5 [2.7] |
| 8.5° | 58.4 | 34.8 | 25.6 | 20.5 | 17.2 | 14.9 | 13.3 |
| 9.0° | 64.3 | 37.2 | 27.2 | 21.7 | 18.2 | 15.8 | 14.1 |
| 9.5° | 71.9 | 39.6 | 28.8 | 23.0 | 19.3 | 16.7 | 14.9 |
| 10.0° | 89.0 [0.01] | 42.1 | 30.5 | 24.3 [2.0] | 20.3 | 17.6 | 15.6 [3.5] |
aAll values are in degrees. Additional change on the sagittal axis is shown in brackets. Inclination of the cutting plane from the sagittal view: anterior-proximal to posterior-distal = varus producing; anterior-distal to posterior-proximal = valgus producing.
bDerotation = external rotation of the distal limb / internal rotation of the proximal limb.