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

UKA unicompartmental knee arthroplasty