Table 2.

Complications between robot-assisted surgery and freehand surgery.

Complications	RA	FH	P
Major complications (person-time)	6	11
Femoral head necrosis	1	4	.37
Femoral neck shortened	5	2	.28
hardware failure	0	3	.25
Severe fracture	0	2	.50
Minor complications (person-time)	0	1
Nonunion	0	1	1.00
Total patients (number)	6	9