Patient specific guides for total knee arthroplasty are ready for primetime

Table 6 Mean (SD) values and amount of patients and percentages of outliers of > 3˚ deviation of the planned alignment and postoperative alignment compared between the cut (n = 28, Trumatch and Visionaire) and pin (n = 29, patient-specific instrument and signature) patient specific matched guides group, n (%)

	Cut PSG	Pin PSG	P value
HKA outliers	4 (14.3)	3 (10.3)	1.000
Mean (SD)	179.9 (2.4)	179.3 (2.2)	0.342
FFC outliers	0	0	1.000
Mean (SD)	90.0 (1.5)	89.6 (1.8)	0.022
FTC outliers	0	1 (3.4)	1.000
Mean (SD)	89.6 (1.3)	90.2 (1.5)	0.115
LFC outliers	4 (14.3)	5 (17.2	1.000
Mean (SD)	85.6 (1.8)	86.6 (3.5)	0.184
LTC outliers	6 (21.4)	3 (10.3)	0.477
Mean (SD)	92.0 (2.7)	93.8 (2.3)	0.009

PSG: Patient specific matched guides; HKA: Hip-knee-ankle angle; FFC: Frontal femoral component; FTC: Frontal tibial component; LFC: Flexion/extension of the femur component; LTC: Lateral tibial component.