Table 4. Rotation angles for transforming loads from the femur- to the implant-based coordinate system and implant neck lengths.
αx, αy and αz = orientation of the implant relative to the femur coordinate system in frontal, sagittal and transverse planes (see Fig 1). L = neck length from head centre to intersection of neck and stem axis (see Fig 1). Data from 10 individual subjects and their average.
| Implant Orientation | Neck Length | |||
|---|---|---|---|---|
| Relative to Femur System | ||||
| Subject | αx [°] | αy [°] | αz [°] | L [mm] |
| H1L | 2.3 | -2.3 | -15.0 | 55.6 |
| H2R | 4.1 | 0.6 | -13.8 | 59.3 |
| H3L | 4.0 | -3.0 | -13.8 | 55.6 |
| H4L | 7.5 | -1.7 | -18.9 | 63.3 |
| H5L | 4.0 | -2.3 | -2.3 | 55.6 |
| H6R | 5.8 | -1.7 | -31.0 | 55.6 |
| H7R | 6.3 | -1.7 | -2.4 | 63.3 |
| H8L | 4.6 | -1.7 | -15.5 | 59.3 |
| H9L | 4.6 | 0.6 | -2.3 | 59.3 |
| H10R | 1.7 | -1.2 | -9.7 | 59.6 |
| Average | 4.5 | -1.4 | -12.5 | 58.7 |