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Table 3 Abductor Moment Arm with Medialization of Femoral Head

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 4.6 4.5 4.9 5.5
  Anterior Neutral 5.0 5.0 5.4 6.3
   45° Abduction 4.1 5.4 5.0 7.3
   30° Adduction 4.1 3.9 4.4 4.7
Gluteus Medius Middle Neutral 4.7 4.6 5.1 5.8
   45° Abduction 4.9 5.4 5.6 7.0
   30° Adduction 3.4 3.1 3.6 3.7
  Posterior Neutral 4.0 3.9 4.3 4.6
   45° Abduction 4.9 4.8 5.2 5.7
   30° Adduction 4.8 4.8 5.3 6.3
  Anterior Neutral 5.0 5.3 5.6 7.3
   45° Abduction 3.3 4.8 3.8 7.5
   30° Adduction 4.2 3.9 4.6 5.1
Gluteus Minimus Middle Neutral 4.8 4.8 5.3 6.4
   45° Abduction 4.8 3.4 5.4 7.7
   30° Adduction 3.3 2.9 3.5 3.6
  Posterior Neutral 4.1 3.8 4.4 4.9
   45° Abduction 5.0 5.0 5.5 6.5
   30° Adduction 4.1 3.9 4.4 4.8
Mean All Divisions Neutral 4.6 4.6 5.0 5.9
   45° Abduction 4.5 4.8 5.1 7.0