TABLE 3.

Interobserver comparisons for landmarks placed on the maxillary teeth (Landmarks 1–6)

		R1					R1					R2
		Mean	SD	BA 95%LoA		ICC	Mean	SD	BA 95%LoA		ICC	Mean	SD	BA 95%LoA		ICC
Maxillary right first molar (Landmark 1)	X	0.02	0.06	−0.10	0.15	0.998	0.00	0.18	−0.36	0.37	0.989	0.00	0.10	−0.19	0.20	0.997
	Y	0.03	0.09	−0.14	0.20	0.999	0.02	0.31	−0.59	0.63	0.989	−0.06	0.30	−0.64	0.52	0.989
	Z	0.00	0.03	−0.06	0.06	0.999	−0.06	0.39	−0.82	0.71	0.884	0.04	0.28	−0.51	0.58	0.954
Maxillary right lateral incisor (Landmark 2)	X	0.00	0.07	−0.13	0.13	0.998	−0.07	0.24	−0.55	0.40	0.978	0.06	0.33	−0.59	0.70	0.965
	Y	0.02	0.07	−0.11	0.15	1.000	−0.02	0.19	−0.40	0.35	0.997	−0.02	0.18	−0.36	0.32	0.998
	Z	0.02	0.07	−0.11	0.15	0.996	0.10	0.60	−1.07	1.28	0.722	−0.06	0.21	−0.46	0.35	0.965
Maxillary right central incisor (Landmark 3)	X	0.00	0.07	−0.14	0.14	0.996	−0.09	0.29	−0.65	0.48	0.933	0.07	0.38	−0.68	0.81	0.921
	Y	0.01	0.06	−0.10	0.13	1.000	−0.03	0.17	−0.36	0.29	0.998	−0.01	0.12	−0.23	0.22	0.999
	Z	0.02	0.08	−0.13	0.18	0.999	0.13	0.59	−1.03	1.29	0.923	−0.09	0.24	−0.56	0.39	0.985
Maxillary left central incisor (Landmark 4)	X	0.00	0.07	−0.14	0.14	0.996	−0.08	0.29	−0.65	0.48	0.916	0.07	0.38	−0.68	0.81	0.879
	Y	0.00	0.06	−0.10	0.11	1.000	−0.06	0.20	−0.45	0.33	0.997	0.01	0.12	−0.23	0.25	0.999
	Z	0.02	0.08	−0.13	0.17	0.998	0.14	0.52	−0.87	1.15	0.924	−0.11	0.29	−0.67	0.46	0.974
Maxillary left lateral incisor (Landmark 5)	X	0.00	0.07	−0.13	0.13	0.998	−0.08	0.23	−0.53	0.38	0.967	0.06	0.33	−0.59	0.70	0.942
	Y	−0.01	0.06	−0.11	0.10	1.000	−0.09	0.27	−0.63	0.45	0.994	0.03	0.19	−0.35	0.41	0.997
	Z	0.02	0.06	−0.11	0.14	0.998	0.14	0.40	−0.65	0.93	0.940	−0.10	0.30	−0.70	0.49	0.969
Maxillary left first molar (Landmark 6)	X	0.02	0.06	−0.10	0.15	0.999	0.01	0.19	−0.36	0.38	0.986	0.00	0.10	−0.19	0.19	0.997
	Y	−0.02	0.07	−0.15	0.11	1.000	−0.11	0.42	−0.94	0.72	0.981	0.05	0.34	−0.61	0.71	0.990
	Z	0.00	0.04	−0.07	0.07	0.998	0.05	0.48	−0.89	0.98	0.741	−0.03	0.28	−0.58	0.52	0.896

Note: Mean and Standard deviation (SD) of the differences, Bland-Altman (BA) 95% limits of agreement, Intraclass correlation coefficient (ICC) between the coordinates (X, right-left or lateral; Y, antero-posterior or sagittal; and Z, superior-inferior or vertical) of the corresponding landmarks. R1 landmark-based registration on the posterior teeth; R2, landmark-based registration on the palate: R3, registration on the palate using regions of interest.