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Table 2 The calculation chart showing length along to neck, body, and offset axis using dual mobility system and 32 mm trial head

From: Does total hip arthroplasty via the direct anterior approach using dual mobility increase leg length discrepancy compared with single mobility?

   If the single mobility 32 mm trial head is used.
Implanted Cup diameter (mm) Dual Mobility Polyethylene outer diameter (mm) Extended length to neck axis (mm) Extended length to body axis (mm) Extended length to offset axis (mm)
46 or 48 38 3 1.8 2.3
50 or 52 42 5 3 4
54 or 56 46 7 4.2 5.6
58 or 60 48 8 4.8 6.3