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Figure 4 | BMC Musculoskeletal Disorders

Figure 4

From: The association between Femoral Tilt and impingement-free range-of-motion in total hip arthroplasty

Figure 4

Zones of impingement-free compliant stem/cup orientation under the influence of (initial) Femoral Tilt. Left side: iFT = 2.1°, right side: iFT = 9.3°. In both cases the effective antetorsion (AT) is set to 15° and NSA = 135°, VV = 4.5°. The zone-of-compliance is more than 200% smaller for iFT = 9.3°. The optimum cup position according to Widmer (marked by a circle) changes from 35° radiographic inclination / 30° anteversion to 39° inclination / 30° anteversion.

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