Table 4.
Proportion of radiographic parameter outliers in the patient-specific instrumentation and conventional instrumentation groups
| Radiographic parameter | Patient-specific instrumentation (n = 23) | Conventional instrumentation (n = 22) | p value |
|---|---|---|---|
| Number of outliers [%] | Number of outliers [%] | ||
| Femur: varus/valgus angle | 1 (varus) [4%] |
None | n.s. |
| Femur: flexion/extension angle | None | 1 (flexed) [5%] |
n.s. |
| Tibia: varus/valgus angle | 5 (all varus) [22%] |
6 (all varus) [27%] |
n.s. |
| Tibia: posterior tilt angle | 2 (1 superior, 1 inferior) [9%] |
5 (all superior) [3%] |
n.s. |
| Tibia: medial fit | None | 1 (underhang) [5%] |
n.s. |
| Tibia: anterior fit | None | None | NA |
| Tibia: posterior fit | None | 1 (overhang) [5%] |
n.s. |
Comments in brackets indicate the direction of the outliers