Table 3 Overall compound motion (mm) during external (ER) and internal (IR) rotation. Abbreviations: IQR = interquartile range; SD = standard deviation
| Â | Â | Â | Compound Motion (mm) during ER | Compound Motion (mm) during IR |
|---|---|---|---|---|
0° | Native | mean ± SD | 6.1 ± 4.8 | 6.1 ± 4.4 |
median | 4.7 | 4.3 | ||
IQR | 7.0 | 5.0 | ||
Elliptical | mean ± SD | 4.3 ± 2.6 | 5.7 ± 6.0 | |
median | 4.1 | 2.5 | ||
IQR | 2.8 | 8.6 | ||
Sphere | mean ± SD | 3.8 ± 2.5 | 4.1 ± 4.0 | |
median | 3.0 | 1.8 | ||
IQR | 2.8 | 7.4 | ||
30° | Native | mean ± SD | 5.2 ± 3.2 | 5.3 ± 4.3 |
median | 5.6 | 3.6 | ||
IQR | 6.2 | 6.3 | ||
Elliptical | mean ± SD | 3.7 ± 2.0 | 4.6 ± 3.8 | |
median | 3.8 | 3.1 | ||
IQR | 2.7 | 6.8 | ||
Sphere | mean ± SD | 3.7 ± 2.6 | 4.5 ± 3.7 | |
median | 3.1 | 3.4 | ||
IQR | 3.6 | 5.7 | ||
45° | Native | mean ± SD | 5.6 ± 3.3 | 5.1 ± 4.7 |
median | 5.5 | 4.2 | ||
IQR | 3.3 | 0.3 | ||
Elliptical | mean ± SD | 3.4 ± 2.8 | 5.5 ± 4.3 | |
median | 2.3 | 4.3 | ||
IQR | 5.0 | 6.9 | ||
Sphere | mean ± SD | 3.3 ± 2.6 | 5.6 ± 4.6 | |
median | 2.6 | 4.0 | ||
IQR | 4.1 | 8.6 | ||
60° | Native | mean ± SD | 6.3 ± 3.1 | 6.5 ± 5.4 |
median | 6.6 | 3.7 | ||
IQR | 1.7 | 9.0 | ||
Elliptical | mean ± SD | 3.2 ± 2.8 | 6.8 ± 5.1 | |
median | 2.4 | 5.0 | ||
IQR | 2.5 | 8.6 | ||
Sphere | mean ± SD | 3.8 ± 3.3 | 7.2 ± 5.7 | |
median | 2.9 | 5.5 | ||
IQR | 3.6 | 10.3 |