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 1
Maximal correction potential of different options of OSF struts for the proximal, middle, and distal thirds of the femur.
(a)
Proximal third
Movement
Option number 1
Option number 2
Option number 3
Translation in the sagittal plane
40 ± 1.1/65 ± 1.6
35 ± 0.9/45 ± 0.9
40 ± 2.0/65 ± 0.8
(anterior/posterior)*
Translation in the frontal plane
43 ± 1.3/70 ± 1.1
30 ± 1.0/35 ± 1.1
48 ± 0.9/67 ± 1.1
(medial/lateral)*
Angulation in the frontal plane
37 ± 1.6/24 ± 1.5
25 ± 1.5/25 ± 1.5
43 ± 0.6/28 ± 1.6
(varus/valgus)
Angulation in the sagittal plane
31 ± 2.4/36 ± 1.2
30 ± 0.8/20 ± 1.0
35 ± 0.9/42 ± 1.0
(procurvatum/recurvatum)
Internal rotation/external rotation
12 ± 1.2/19 ± 1.3
23 ± 1.6/24 ± 1.6
27 ± 0.6/23 ± 1.0
(b)
Middle third
Movement
Option number 1
Option number 2
Option number 3
Option number 4
Translation in the sagittal plane
58 ± 0.6/67 ± 0.6
70 ± 0.5/77 ± 0.4
70 ± 2.2/80 ± 0.8
70 ± 0.4/80 ± 0.5
(anterior/posterior)*
Translation in the frontal plane
75 ± 0.7/52 ± 0.4
60 ± 0.3/60 ± 0.5
72 ± 1.1/75 ± 1.1
73 ± 0.3/50 ± 0.5
(medial/lateral)*
Angulation in the frontal plane
43 ± 0.5/43 ± 0.3
45 ± 0.5/25 ± 0.4
45 ± 1.4/48 ± 0.8
45 ± 0.6/48 ± 0.7
(varus/valgus)
Angulation in the sagittal plane
15 ± 0.3/40 ± 0.2
38 ± 0.2/41 ± 0.3
40 ± 0.8/43 ± 0.9
20 ± 0.3/40 ± 0.2
(procurvatum/recurvatum)
Internal rotation/external rotation
50 ± 1.1/12 ± 0.6
35 ± 0.5/30 ± 0.4
35 ± 1.3/35 ± 0.9
30 ± 0.5/37 ± 1.6
(c)
Distal third
Movement
Option number 1
Option number 2
Option number 3
Option number 4
Option number 5
Translation in the sagittal plane
46 ± 0.4/60 ± 0.4
−5 ± 0.3/60 ± 0.4
66 ± 0.4/70 ± 0.6
70 ± 0.4/94 ± 0.5
67 ± 0.4/85 ± 0.6
(anterior/posterior)*
Translation in the frontal plane
85 ± 0.2/60 ± 0.6
40 ± 0.3/41 ± 0.4
85 ± 0.5/66 ± 0.4
68 ± 0.3/45 ± 0.3
68 ± 0.4/45 ± 0.5
(medial/lateral)*
Angulation in the frontal plane
35 ± 0.2/35 ± 0.2
20 ± 0.2/42 ± 0.2
35 ± 0.3/35 ± 0.2
37 ± 0.2/35 ± 0.3
35 ± 0.2/40 ± 0.4
(varus/valgus)
Angulation in the sagittal plane
34 ± 0.3/20 ± 0.2
35 ± 0.3/10 ± 0.4
35 ± 0.2/40 ± 0.2
35 ± 0.4/25 ± 0.2
34 ± 0.2/25 ± 0.3
(procurvatum/recurvatum)
Internal rotation/external rotation
27 ± 0.2/30 ± 0.2
10 ± 0.2/25 ± 0.2
27 ± 0.2/30 ± 0.2
10 ± 0.2/23 ± 0.2
14 ± 0.3/30 ± 0.2
Values of translation measured in mm. Values of angulation measured in degrees. Values of rotational measured in degrees.
