Table 3.
Summary of the radiographic parameters in the patient-specific instrumentation and conventional instrumentation groups
| Radiographic parameter | Patient-specific instrumentation | Conventional instrumentation | p value (means) |
|---|---|---|---|
| Mean (SD) | Mean (SD) | ||
| Femur: varus/valgus angle | 0.9° varus (4.0) | 1.8° varus (3.0) | n.s. |
| Femur: flexion/extension angle | 9.1° flexion (3.0) | 8.8° flexion (4.8) | n.s. |
| Tibia: varus/valgus angle | 3.5° varus (2.9) | 4.0° varus (2.1) | n.s. |
| Tibia: posterior tilt angle | 1.8° superior (2.8) | 3.7° superior (2.1) | 0.029** |
| Tibia: medial fit | 0 mm (1.0) | 1.0 mm underhang (1.3) | n.s. |
| Tibia: anterior fit | 1.0 mm underhang (0.9) | 1.0 mm underhang (0.7) | n.s. |
| Tibia: posterior fit | 0 mm (0.8) | 0 mm (0.9) | n.s. |
SD standard deviation
** Statistically significant difference