Table 2.
Properties of the modular parts and bearing surfaces used in the study population
| Type of modular neck | No. | Size proximal part | No. | Size distal part | No. | Head diameter | No. | Bearing surfaces | No. |
|---|---|---|---|---|---|---|---|---|---|
| AR 15 long | 3 | Extra small | 1 | Short | 45 | 22 | 2 | Alumina – alumina | 6 |
| AR 15 short | 1 | Small | 25 | Medium | 18 | 28 | 11 | Alumina – PE | 5 |
| AR 8 long | 16 | Std 1 | 13 | Long | 5 | 32 | 31 | Alumina/PE – XLK (cross -inked) | 20 |
| AR 8 short | 4 | Std 2 | 13 | 36 | 11 | Metal – metal | 14 | ||
| AR/VV long | 8 | Std 3 | 9 | 50 | 6 | Metal – PE | 4 | ||
| AR/VV short | 3 | Std 4 | 6 | 54 | 3 | Metal – metal | 1 | ||
| S long | 21 | Large | 1 | 58 | 4 | Metal/PE – XLK (cross-linked) | 18 | ||
| S short | 7 | ||||||||
| VV long | 1 | ||||||||
| VV short | 4 |
AR15 15° anteversion/retroversion neck, AR 8 8° anteversion/retroversion neck, AR/VV 8° anteversion/retroversion with varus/valgus neck, S straight neck, VV varus/valgus neck, Std standard proximal part, PE polyethylene