Table 2.

Paired sample t test of best fit alignment and manual n-point + global registration in the mandible (n = 12)

	mean (M ± SD)		Paired difference (M ± SD)
	Best fit alignment	Manual + Global Registration		t	df	Sig.(two-side)
RMS(mm)	0.727 ± 0.253	0.549 ± 0.147	0.178 ± 0.337	1.179	11	0.304
Avg. positive deviation(mm)	0.384 ± 0.102	0.356 ± 0.115	0.028 ± 0.112	0.566	11	0.602
Avg. negative deviation(mm)	-0.189 ± 0.042	-0.164 ± 0.260	0.025 ± 0.295	0.190	11	0.859
Nominal value (mm)	±(0.183 ± 0.012)
Nominal value proportion (%)	44.16 ± 13.07	66.27 ± 5.81	-22.11 ± 11.93	-4.144	11	0.014*

Note: * P < 0.05. In the nominal value threshold proportion, there was a statistically significant difference between the two registration methods