Table 2.
Axial Stiffness, Axial Displacement, Torsional Stiffness, and Displacement After Monoplanar and Biplanar MCW-DFO a
| Parameters | Monoplanar MCW-DFO | |||
|---|---|---|---|---|
| Intact | Fracture | Screw | Plate | |
| Axial stiffness, kN/mm (P) |
3.92 ± 0.53 | 2.68 ± 0.89 (.308) |
2.96 ± 1 (.762) |
3.17 ± 0.99 (.964) |
| Axial displacement, mm (P) |
0.03 ± 0.01 | 0.39 ± 0.11 (<.001) |
0.28 ± 0.09 (<.001) |
0.11 ± 0.07 (.913) |
| Torsional stiffness ER, N·m/deg (P) |
12.77 ± 1.91 | 2.65 ± 0.55 (<.001) |
4.41 ± 1.54 (<.001) |
7.18 ± 1.66 (<.001) |
| Torsional stiffness IR, N·m/deg (P) |
11.01 ± 3.32 | 2.44 ± 0.62 (<.001) |
4.10 ± 1.59 (<.001) |
6.53 ± 1.59 (<.001) |
| Displacement ER, mm (P) |
0.06 ± 0.01 | 2.23 ± 0.52 (<.001) |
2.04 ± 0.57 (<.001) |
0.65 ± 0.27 (.603) |
| Displacement IR, mm (P) |
0.06 ± 0.02 | 2.35 ± 0.37 (<.001) |
1.67 ± 0.21 (<.001) |
0.65 ± 0.27 (.237) |
| Parameters | Biplanar MCW-DFO | |||
| Intact | Fracture | Screw | Plate | |
| Axial stiffness, kN/mm (P) |
2.45 ± 0.72 | 1.61 ± 0.56 (.943) |
2.25 ± 0.54 (>.999) |
2.60 ± 0.71 (.999) |
| Axial displacement, mm (P) |
0.07 ± 0.01 | 0.27 ± 0.11 (.052) |
0.22 ± 0.10 (.631) |
0.15 ± 0.08 (>.999) |
| Torsional stiffness ER, N·m/deg (P) |
12.77 ± 1.91 | 2.78 ± 0.41 (<.001) |
4.38 ± 0.73 (<.001) |
7.20 ± 2.19 (<.001) |
| Torsional stiffness IR, N·m/deg (P) |
10.46 ± 2.21 | 2.56 ± 0.56 (<.001) |
3.45 ± 0.83 (<.001) |
7.19 ± 1.89 (.002) |
| Displacement ER, mm (P) |
.05 ± 0.04 | 1.92 ± 0.39 (<.001) |
1.11 ± 0.67 (.004) |
0.50 ± 0.27 (.936) |
| Displacement IR, mm (P) |
0.07 ± 0.06 | 2.05 ± 0.39 (<.001) |
1.71 ± 0.32 (<.001) |
0.72 ± 0.54 (.129) |
a
Data are presented as mean ± SD. Bold values indicate significant P values. ER, external rotation; IR, internal rotation; MCW-DFO, medial closing wedge distal femoral osteotomy.