The Effect of Femoral Cutting Guide Design Improvements for Patient-Specific Instruments

Table 3

Differences between planned bone resections and bone resections recorded from the PSI intraoperatively (mm).

		Group II			Group III
		MRI 2 mm slice thickness (w/motion artifacts) & offset design ()	MRI 2 mm slice thickness (w/o motion artifacts) & full contact design ()	Ave.	MRI 2 mm slice thickness (w/motion artifacts), offset & optimized design ()	MRI 2 mm slice thickness (w/o motion artifacts), full contact & optimized design ()	Ave.
Distal	(±SD)	0.56 (±0.12)	0.28 (±0.04)	0.44 (±0.17)	0.26 (±0.04)	0.16 (±0.04)	0.21 (±0.06)
	(±SD)	0.46 (±0.09)	0.18 (±0.03)	0.32 (±0.15)	0.14 (±0.03)	0.12 (±0.02)	0.13 (±0.03)
Posterior	(±SD)	0.34 (±0.07)	0.23 (±0.03)	0.27 (±0.08)	0.20 (±0.03)	0.18 (±0.02)	0.19 (±0.02)
	(±SD)	0.19 (±0.03)	0.17 (±0.01)	0.18 (±0.02)	0.14 (±0.02)	0.12 (±0.01)	0.13 (±0.01)