Table 2
Anatomical measurements from the present study compared to the cephalomedullary nail designs parameters of the Stryker Gamma 3 Nail (Kalamazoo, Michigan, USA) [6] and the Smith and Nephew Intertan (Watford, UK) [5].
| Measurement description | Mean ± SD | Gamma 3a | Intertana |
|---|---|---|---|
| Femur neck-shaft axis offset (mm) | 6.1 ± 1.7 | ||
| GT to sLSNI (mm) | 40.3 ± 5.1 | 38.4, 42, 46 (end caps to 10 mm) | 35.6 (with 125° angled nail) |
| The length depends on the length of the nail. | |||
| Femur neck axis length (mm) | 94.1 ± 7.4 | 70–130 | 70–125 |
| NSA of proximal femur (°) | 126.3 ± 5.4 | 120, 125, 130 | 125, 130 |
| Radius of curvature (m) | 1.2 ± 0.3 | 1.5, 2 | 1.5 |
| Femur anteversion (°) | 18.8 ± 9.2 | 10 | 12 |
Abbreviations: SD, standard deviation; mm, millimeter; NSA, neck-shaft angle; m, meter; GT, greater trochanter tip; sLSNI, shaft, and lag screw nail interface.
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