Determination of the Maximal Corrective Ability and Optimal Placement of the Ortho-SUV Frame for Femoral Deformity with respect to the Soft Tissue Envelope, a Biomechanical Modelling Study
Table 2
Maximal correction of OSF (option number 3) for the proximal, middle, and distal thirds of the femur with differing intercalary ring distance.
(a)
Proximal third
Movement
Distance between rings
Distance between rings
Distance between rings
of 120 mm
of 150 mm
of 200 mm
Translation in the sagittal plane
30 ± 1.9/35 ± 0.9
40 ± 1.1/65 ± 1.6
65 ± 0.8/33 ± 1.2
(anterior/posterior)*
Translation in the frontal plane
15 ± 0.8/50 ± 1.1
48 ± 0.8/67 ± 1.1
63 ± 1.7/30 ± 0.6
(medial/lateral)*
Angulation in the frontal plane
24 ± 0.9/13 ± 0.9
43 ± 1.6/28 ± 1.5
52 ± 1.6/30 ± 1.6
(varus/valgus)
Angulation in the sagittal plane
15 ± 0.7/40 ± 0.6
35 ± 2.4/42 ± 1.2
39 ± 0.6/43 ± 0.6
(procurvatum/recurvatum)
Internal rotation/external rotation
5 ± 0.6/5 ± 0.6
27 ± 1.2/23 ± 1.3
25 ± 0.8/26 ± 0.9
(b)
Middle third
Movement
Distance between rings
Distance between rings
Distance between rings
of 120 mm
of 150 mm
of 200 mm
Translation in the sagittal plane
20 ± 0.3/45 ± 0.3
70 ± 0.7/80 ± 0.5
100 ± 0.4/70 ± 0.3
(anterior/posterior)*
Translation in the frontal plane
50 ± 0.4/60 ± 0.4
72 ± 0.4/75 ± 0.2
100 ± 0.5/55 ± 0.4
(medial/lateral)*
Angulation in the frontal plane
35 ± 0.5/27 ± 0.3
45 ± 0.6/48 ± 0.4
55 ± 0.6/60 ± 0.5
(varus/valgus)
Angulation in the sagittal plane
20 ± 0.2/30 ± 0.3
40 ± 0.4/43 ± 0.3
45 ± 0.3/53 ± 0.5
(procurvatum/recurvatum)
Internal rotation/external rotation
12 ± 0.3/25 ± 0.4
35 ± 0.5/35 ± 0.3
25 ± 0.4/37 ± 0.6
(c)
Distal third
Movement
Distance between rings
Distance between rings
Distance between rings
of 120 mm
of 150 mm
of 200 mm
Translation in the sagittal plane
55 ± 0.3/54 ± 0.35
66 ± 0.4/70 ± 0.6
70 ± 0.5/55 ± 0.4
(anterior/posterior)*
Translation in the frontal plane
23 ± 0.3/25 ± 0.4
85 ± 0.5/60 ± 0.4
43 ± 0.4/55 ± 0.3
(medial/lateral)*
Angulation in the frontal plane
27 ± 0.3/27 ± 0.2
35 ± 0.3/35 ± 0.2
32 ± 0.5/38 ± 0.3
(varus/valgus)
Angulation in the sagittal plane
17 ± 0.2/25 ± 0.3
35 ± 0.2/40 ± 0.2
46 ± 0.4/45 ± 0.3
(procurvatum/recurvatum)
Internal rotation/external rotation
10 ± 0.2/16 ± 0.2
25 ± 0.2/30 ± 0.2
28 ± 0.7/40 ± 0.5
Values of translation measured in mm. Values of angulation measured in degrees. Values of rotation measured in degrees.
