Table 1.
Axial Stiffness, Axial Displacement, Torsional Stiffness, and Displacement After Monoplanar and Biplanar LOW-DFO a
| Parameters | Monoplanar LOW-DFO | |||
|---|---|---|---|---|
| Intact | Fracture | Screw | Plate | |
| Axial stiffness, kN/mm (P) |
2.99 ± 0.83 | 2.26 ± 0.62 (.972) |
2.57 ± 0.65 (>.999) |
2.69 ± 0.67 (>.999) |
| Axial displacement, mm (P) |
0.17 ± 0.07 | 0.39 ± 0.11 (.001) |
0.28 ± 0.09 (.519) |
0.21 ± 0.09 (>.999) |
| Torsional stiffness ER, N·m/deg (P) |
8.54 ± 1.23 | 2.30 ± 0.51 (<.001) |
2.62 ± 0.67 (<.001) |
5.62 ± 1.35 (.007) |
| Torsional stiffness IR, N·m/deg (P) |
7.89 ± 1.30 | 2.05 ± 0.23 (<.001) |
3 ± 0.68 (<.001) |
5.77 ± 1.51 (.518) |
| Displacement ER, mm (P) |
0.34 ± 0.26 | 3.40 ± 0.77 (<.001) |
2.39 ± 0.79 (<.001) |
0.76 ± 0.39 (.964) |
| Displacement IR, mm (P) |
0.17 ± 0.02 | 3.34 ± 0.73 (<.001) |
2.50 ± 0.80 (<.001) |
0.69 ± 0.42 (.509) |
| Parameters | Biplanar LOW-DFO | |||
| Intact | Fracture | Screw | Plate | |
| Axial stiffness, kN/mm (P) |
2.56 ± 1.28 | 1.98 ± 1.18 (.997) |
2.71 ± 1.12 (>.999) |
2.80 ± 1.01 (>.999) |
| Axial displacement, mm (P) |
0.11 ± 0.03 | 0.28 ± 0.85 (.021) |
0.20 ± 0.07 (.787) |
0.13 ± 0.03 (>.999) |
| Torsional stiffness ER, N·m/deg (P) |
9.45 ± 2.91 | 3.04 ± 0.52 (<.001) |
4.08 ± 0.88 (<.001) |
6.41 ± 1.66 (.004) |
| Torsional stiffness IR, N·m/deg (P) |
9.31 ± 3.24 | 2.75 ± 0.40 (<.001) |
3.91 ± 0.74 (<.001) |
6.28 ± 1.68 (.044) |
| Displacement ER, mm (P) |
0.14 ± 0.11 | 2.21 ± 0.65 (<.001) |
1.70 ± 0.72 (<.001) |
0.62 ± 0.14 (.891) |
| Displacement IR, mm (P) |
0.13 ± 0.07 | 2.54 ± 0.35 (<.001) |
1.53 ± 0.56 (<.001) |
0.70 ± 0.16 (.294) |
a
Data are presented as mean ± SD. Bold values indicate significant P values. ER, external rotation; IR, internal rotation; LOW-DFO, lateral opening wedge distal femoral osteotomy.