Computed tomography-based patient-specific cutting guides used for positioning of the femoral component of implants during unicompartmental knee arthroplasty: a cadaver study

Table 2 Comparison of the conveniency and accuracy for positioning of the femoral component of the implants between PSI and CI groups

Variables	Osteotomy time (minutes)	Coronal alignment of prostheses (^o)	Sagittal alignment of prostheses (^o)
PSI group (n = 25)	3.12 ± 0.65	1.43 ± 0.93	8.80 ± 0.65
CI group (n = 25)	4.33 ± 0.73	2.65 ± 1.50	6.29 ± 1.88
Statistic value (t)	-12.194	-3.666	6.959
P-value	< 0.001	0.001	< 0.001
Increased (or decreased) fold*	-1.20 ± 0.20	-1.19 ± 1.75	2.50 ± 1.81

PSI, patient specific instrumentation; CI, conventional instrumentation. *An increase or decrease in PSI group relative to the CI group

ISSN: 1471-2482