Table 2 Mean differences and 95% confidence intervals of intraoperative time compared between NAVIO and MAKO robotically assisted unicompartmental knee arthroplasty
Surgical steps | NAVIO robotically assisted UKA (n = 16) | MAKO robotically assisted UKA (n = 17) | Mean difference and 95% confidence interval | P value |
|---|---|---|---|---|
Hip and ankle center registration | 5.6 (3.9, 7.2) | 2 (0.6, 3.4) | 3.6 (1.5, 5.7) | 0.001 |
Registration of femur and tibia | 8.4 (6.8, 10.0) | 5.4 (4.0, 6.8) | 3.0 (0.9, 5.1) | 0.005 |
Registration of ligament tension | 1.9 (0.2, 3.5) | 2.8 (1.4, 4.2) | − 0.9 (− 3.1, 1.2) | 0.389 |
Implant planning | 6.1 (4.5, 7.7) | 5.2 (3.8, 6.5) | 0.9 (− 1.2, 3.0) | 0.398 |
Femoral preparation | 11.5 (9.9, 13.1) | 7.6 (6.2, 9.0) | 3.9 (1.8, 6.0) | < 0.001 |
Tibial preparation | 8.2 (6.6, 9.8) | 8.0 (6.6, 9.4) | 0.2 (−1.9, 2.3) | 0.843 |
Trial implantation | 8.9 (7.2, 10.5) | 5.4 (4.0, 6.8) | 3.4 (1.3, 5.6) | 0.001 |
Total operative time, min, mean (SD) | 98.0 (8.4) | 82.5 (11.8) | 15.4 (8.1, 22.8) | 0.0002 |