Table 3.
Absolute translations (in mm) of the clinical RSA examinations at 2-year follow-up. There was no statistically significant difference between the groups (p > 0.2)
| Axis: | DLC all-poly cup (n = 10 a) |
Electra screw cup (n = 10 a) |
||||||
|---|---|---|---|---|---|---|---|---|
| x | y | z | TT b | x | y | z | TT b | |
| Mean (mm) | 0.09 | 0.12 | 0.14 | 0.24 | 0.06 | 0.12 | 0.14 | 0.19 |
| SD (mm) | 0.06 | 0.05 | 0.14 | 0.10 | 0.07 | 0.14 | 0.10 | 0.16 |
| Minimum | 0.002 | 0.04 | 0.03 | 0.11 | 0.02 | 0.001 | 0.001 | 0.05 |
| Maximum | 0.17 | 0.22 | 0.42 | 0.44 | 0.25 | 0.49 | 0.26 | 0.61 |
a Total translation (TT) values are given without the 2 outliers at 2 years (1 loose/revised cup and 1 suspected loose cup; both with TT of > 1 mm).
b The total translation was calculated using the 3D Pythagorean theorem.