A comparison of pin site complications between large and small pin diameters in robotic-assisted total knee arthroplasty

Journal of Experimental Orthopaedics

Table 2 Complications by Type

	All (n = 367)	LPD (n = 177)	SPD (n = 190)	Adjusted OR^a	p-value^a
Total Pin-Site Complications, n (%)	15 (4.1)	10 (5.6)	5 (2.6)	0.48 (0.16, 1.44)	.18
Intraoperative pin-site fracture	5 (1.4)	4 (2.8)	1 (0.5)	0.24 (0.03, 2.21)	.16
Postoperative pin-site fracture	1 (0.3)	1 (0.6)	0 (0.0)	-	.25
Pin-site infection/drainage*	7 (1.9)	4 (2.2)	3 (1.6)	0.69 (0.15, 3.19)	.63
Pin-site delayed wound healing*	2 (0.5)	1 (0.6)	1 (0.5)	0.93 (0.06, 15.0)	.89
Neurovascular injury	0 (0.0)	0 (0.0)	0 (0.0)	-	-
Pin or drill bit breakage	0 (0.0)	0 (0.0)	0 (0.0)	-	-
Non-Pin-Site Complications, n (%)	32 (8.7)	18 (10.2)	14 (7.4)	0.67 (0.32, 1.41)	.29
Reoperation, n (%)	13 (3.5)	7 (4.0)	6 (3.2)	0.76 (0.25, 2.34)	.63

LPD large pin diameter robotic-assisted total knee arthroplasty system, SPD small pin diameter robotic-assisted total knee arthroplasty system
^*Pin-site infection/drainage and delayed wound healing included only tibial pin sites, as femoral pin sites were placed through the primary incision
^aOdds ratio and p-value adjusted for age via logistic regression