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Table 3 Design characteristics of uncemented collared femoral stems by different manufacturers

From: Proximal femoral anatomy and collared stems in hip arthroplasty: is a single collar size sufficient?

Manufacturer Stem Brand Femoral neck angle (°) Stem Size Collar Size (mm)
   ‘Standard’ ‘Varus’   ‘Standard’ ‘Varus’
Depuy Corail 135 125 8–10 6 7.5
     11 7 8
     12–14 7 9.5
     15 7 11
     16–20 8 12
Smith and Nephew Echelon 131 11–19 7.5
  Synergy 131 9–17 7.5
Tornier Meije 130 123 1–3 7 7
     4–6 8 8
     7–10 9 9
Serf Hype 130 1–11a 5–7.5
Dedienne Symbol 130 120 1–2 6.5 8
     3–4 7.5 9
     5–6 8.5 10
     7–8 9.5 11
     9–10 10.5 12
Xnov Cineos 135 125 9–20 7 7
  1. acollar size increases by increments of 0.25 mm for each stem size