Table 3.

Comparisons of root diameters and total root-bone thickness between Ceph, U1CT, and U2CT.

Maxillary Teeth (n = 64)	Ceph	U1CT	U2CT	ANOVA p-Value	Differences
	(C)	(U1)	(U2)		C-U1	C-U2	U1-U2
1) Root diameters
3 mm apical to CEJ	5.61 ± 0.68	6.07 ± 0.65	5.54 ± 0.60	<0.001	0.46 *	0.07	0.52 **
6 mm apical to CEJ	5.16 ± 0.55	5.68 ± 0.58	5.32 ± 0.80	<0.001	0.52 **	0.16	0.36 *
9 mm apical to CEJ	4.64 ± 0.63	5.02 ± 0.63	4.85 ± 0.79	0.018	0.38	0.21	0.17
2) Total root-bone thickness
3 mm apical to CEJ	7.95 ± 0.81	7.80 ± 0.81	7.15 ± 0.60	<0.001	0.15	0.80 **	0.65 **
6 mm apical to CEJ	8.35 ± 0.57	8.04 ± 0.77	7.57 ± 0.70	<0.001	0.31	0.78 **	0.47 *
9 mm apical to CEJ	9.05 ± 0.75	8.25 ± 0.79	7.97 ± 0.91	<0.001	0.80 **	1.08 **	0.28

Differences between groups were tested by ANOVA and Bonferroni test. * p < 0.01, ** p < 0.001.