Table 1 Abductor Moment Arm for Commerical Prostheses and Native Femur
From: Hip abductor moment arm - a mathematical analysis for proximal femoral replacement
| Muscle Division | Position | Abductor Moment Arm (cm) | ||||
|---|---|---|---|---|---|---|
| Biomet - Letson | Biomet - Finn | Stryker - GMRS | Native Femur | |||
| 30° Adduction | 4.2 | 3.6 | 4.5 | 4.5 | ||
| Anterior | Neutral | 4.9 | 4.8 | 5.4 | 6.0 | |
| 45° Abduction | 3.5 | 5.2 | 4.4 | 7.4 | ||
| 30° Adduction | 3.6 | 2.9 | 3.8 | 3.7 | ||
| Gluteus Medius | Middle | Neutral | 4.7 | 4.3 | 5.1 | 5.4 |
| 45° Abduction | 4.6 | 5.4 | 5.4 | 7.2 | ||
| 30° Adduction | 2.8 | 2.0 | 2.9 | 2.6 | ||
| Posterior | Neutral | 4.0 | 3.5 | 4.2 | 4.2 | |
| 45° Abduction | 5.0 | 5.0 | 5.5 | 6.2 | ||
| 30° Adduction | 4.6 | 4.1 | 5.0 | 5.5 | ||
| Anterior | Neutral | 5.0 | 5.2 | 5.6 | 7.1 | |
| 45° Abduction | 2.5 | 4.5 | 3.0 | 7.3 | ||
| 30° Adduction | 3.8 | 3.0 | 4.0 | 4.0 | ||
| Gluteus Minimus | Middle | Neutral | 4.8 | 4.5 | 5.3 | 6.1 |
| 45° Abduction | 4.3 | 5.4 | 5.0 | 7.8 | ||
| 30° Adduction | 2.7 | 1.8 | 2.8 | 2.4 | ||
| Posterior | Neutral | 4.0 | 3.4 | 4.3 | 4.5 | |
| 45° Abduction | 5.0 | 5.2 | 5.6 | 6.9 | ||
| 30° Adduction | 3.6 | 2.9 | 3.8 | 3.8 | ||
| Mean | All Divisions | Neutral | 4.6 | 4.3 | 5.0 | 5.6 |
| 45° Abduction | 4.2 | 5.1 | 4.8 | 7.1 | ||