Table 2 Reproducibility results showing the difference in calculated bony resection thicknesses (giving a measure of the accuracy of component placement) for the distal medial and lateral condyles, posterior medial and lateral condyles, and tibial medial and lateral plateaus across two cases performed by three engineers at two different time points. The maximum average difference for each case and a 95% confidence interval are shown for all resections
Case | Operator | Run | Femoral resections | Tibial resections | ||||
|---|---|---|---|---|---|---|---|---|
Lat. condyle | Med. condyle | Post. lat. condyle | Post. med. condyle | Lat. plateau | Med. plateau | |||
Case 1 | Sim Eng A | Run 1 | 6.5 | 6.0 | 10.0 | 10.3 | 11.2 | 10.0 |
Case 1 | Sim Eng A | Run 2 | 6.2 | 5.7 | 10.0 | 10.7 | 10.3 | 9.0 |
Case 1 | Sim Eng B | Run 1 | 6.1 | 5.4 | 10.2 | 11.1 | 10.5 | 9.3 |
Case 1 | Sim Eng B | Run 2 | 6.8 | 6.1 | 10.2 | 10.6 | 11.1 | 9.8 |
Case 1 | Sim Eng C | Run 1 | 6.2 | 5.7 | 9.5 | 10.7 | 10.7 | 9.6 |
Case 1 | Sim Eng C | Run 2 | 6.4 | 6.0 | 9.9 | 10.3 | 11.1 | 9.9 |
Maximum difference from average (mm) ± 95% CI | 0.3 ± 0.2 | 0.4 ± 0.2 | 0.4 ± 0.2 | 0.4 ± 0.2 | 0.4 ± 0.2 | 0.5 ± 0.3 | ||
Case 2 | Sim Eng A | Run 1 | 6.0 | 7.4 | 10.9 | 10.3 | 11.0 | 6.7 |
Case 2 | Sim Eng A | Run 2 | 6.2 | 7.8 | 10.8 | 10.3 | 11.1 | 7.0 |
Case 2 | Sim Eng B | Run 1 | 6.1 | 7.7 | 10.6 | 10.2 | 10.9 | 6.7 |
Case 2 | Sim Eng B | Run 2 | 6.1 | 7.6 | 10.8 | 9.9 | 11.2 | 6.9 |
Case 2 | Sim Eng C | Run 1 | 5.9 | 7.5 | 11.0 | 10.6 | 11.0 | 6.3 |
Case 2 | Sim Eng C | Run 2 | 6.0 | 7.4 | 10.9 | 10.4 | 10.9 | 6.6 |
Maximum difference from average (mm) ± 95% CI | 0.2 ± 0.1 | 0.2 ± 0.1 | 0.2 ± 0.1 | 0.2 ± 0.1 | 0.2 ± 0.1 | 0.3 ± 0.2 | ||