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Table 3 The robotic table: An intended derotation angle and an intended change on the coronal axis, equals a specific inclined cutting angle from the sagittal view

From: Single cut distal femoral osteotomy for correction of femoral torsion and valgus malformity in patellofemoral malalignment - proof of application of new trigonometrical calculations and 3D-printed cutting guides

Change on coronal axis

Derotationā€‰=ā€‰external rotation of the distal limb / internal rotation of proximal limb

Ā 

10Ā°

15Ā°

20Ā°

25Ā°

30Ā°

35Ā°

40Ā°

1

5.8

3.9

2.9

2.4

2.0

1.7

1.6

Additional change on sagittal axis in []

1.5

8.7

5.8

4.4

3.6

3.0

2.6

2.3

2

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

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

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

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

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

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

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

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

89.0 [.01]

42.1

30.5

24.3 [2.0]

20.3

17.6

15.6 [3.5]

The Robotic Table

Inclination of cutting plane from sagittal view

Ā Ā Ā 

All values in degrees (Ā°)

Ant.-prox. to post.-dist. = varus producing

Ā Ā Ā 

Ant.-dist. to post.-prox. = valgus producing

Ā Ā Ā