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.