. Author manuscript; available in PMC: 2017 Mar 1.

Published in final edited form as: Int J Comput Assist Radiol Surg. 2015 Jul 17;11(3):483–493. doi: 10.1007/s11548-015-1261-7

Table 3.

Drilling accuracy data for medial drilling experiments

Parameters^a,^b	Targeting error magnitude (mm)			X-Y position of error (mm)
Parameters^a,^b	μ ± σ	RMS	Max.	X, μ ± σ	Y, μ ± σ
0°/6 mm	0.035 ± 0.011	0.037	0.060	−0.031 ± 0.014	0.012 ± 0.007
15°/6 mm	0.027 ± 0.009	0.029	0.042	−0.019 ± 0.011	0.094 ± 0.017
30°/6 mm	0.028 ± 0.021	0.035	0.071	−0.023 ± 0.024	0.003 ± 0.012
45°/6 mm	0.053 ± 0.023	0.058	0.090	−0.028 ± 0.021	−0.041 ± 0.020
60°/6 mm	0.098 ± 0.036	0.105	0.166	−0.056 ± 0.029	−0.079 ± 0.028
75°/6 mm	0.116 ± 0.011	0.117	0.131	−0.037 ± 0.021	−0.109 ± 0.012
45°/3 mm	0.072 ± 0.017	0.074	0.104	−0.052 ± 0.022	−0.046 ± 0.011
45°/9 mm	0.117 ± 0.043	0.125	0.185	−0.054 ± 0.022	−0.103 ± 0.041

12 trials were performed for each case

Parameters are angle of bone at contact point/cantilevered length of drill bit from end of bushing to contact point