Table 4.

Crown width and root length measurements of CBCT reconstructed tooth models under different voxel and threshold conditions

Voxel size (mm)	Thresholds (HU)	Crown width				Root length
		Mean Width ± SD(mm)	Difference ± SD(mm)	Deviation(%)	P-value	Mean Width ± SD(mm)	Difference ± SD(mm)	Deviation(%)	P-value
0.3 mm	800	8.11 ± 1.49	0.56 ± 0.08	7.69%	0.000	14.41 ± 1.76	0.31 ± 0.09	2.26%	0.000
	1000	8.04 ± 1.49	0.49 ± 0.08	6.74%	0.000	14.32 ± 1.76	0.22 ± 0.07	1.58%	0.000
	1200	7.98 ± 1.49	0.43 ± 0.08	5.91%	0.000	14.25 ± 1.77	0.15 ± 0.07	1.08%	0.000
	1400	7.93 ± 1.49	0.38 ± 0.08	5.18%	0.000	14.15 ± 1.76	0.05 ± 0.08	0.39%	0.000
	1600	7.87 ± 1.47	0.32 ± 0.09	4.42%	0.000	14.07 ± 1.76	-0.03 ± 0.08	-0.21%	0.000
0.15 mm	800	7.91 ± 1.49	0.36 ± 0.07	4.97%	0.000	14.24 ± 1.76	0.14 ± 0.05	1.03%	0.000
	1000	7.87 ± 1.49	0.31 ± 0.06	4.32%	0.000	14.18 ± 1.76	0.08 ± 0.05	0.56%	0.000
	1200	7.82 ± 1.49	0.27 ± 0.06	3.66%	0.000	14.12 ± 1.77	0.02 ± 0.05	0.14%	0.000
	1400	7.78 ± 1.49	0.22 ± 0.06	3.06%	0.000	14.03 ± 1.76	-0.07 ± 0.07	-0.5%	0.000
	1600	7.73 ± 1.49	0.18 ± 0.06	2.47%	0.000	13.96 ± 1.76	-0.14 ± 0.09	-1.02%	0.000
laser model		7.55 ± 1.50				14.10 ± 1.76

P-value: Mean crown width/ root length of CBCT model vs. mean laser model