Table 1.

Mean, difference of means, random error (Dahlberg) and Intraclass correlation (ICC) for intra-method analysis of the face measurements in the direct technique (caliper) and 3D scanner.

	Direct measurement (caliper)							3D Scanner
	Mean							Mean
Variables	W/out	With	Difference X1-X2		Random error		ICC p-value	W/out	With	Difference X3-X4		Random error		ICC p-value
	point	point						point	point
(mm)	X1	X2	mm	(%)	mm	(%)		X3	X4	mm	(%)	mm	(%)
N–Sn	53,64	53,15	0,49	0,92	1,23	2.30	0,88***	51,62	53,73	−2,11	−4,01	1,89	3.59	0,73**
N–Me	117,74	115,34	2,4	2,06	2,47	2.12	0,86***	114,88	116,53	−1,65	−1,43	2,01	1.74	0,91***
Sn–Me	64,74	63,71	1,03	1,60	1,71	2.66	0,87***	64,99	64,28	0,71	1,10	1,76	2.72	0,87***
ExR-ExL	98,96	98,17	0,79	0,60	1,77	1.35	0,94***	97,14	99,18	−2,04	−2,08	1,87	1.91	0,93***
ChR-ChL	50,97	51,15	−0,18	−0,35	0,99	1.94	0,89***	50,87	52,03	−1,16	−2,.25	1,41	2.74	0,86***
Pg-TR	141,96	143,86	−1,9	−1,33	2,01	1.41	0,92***	144,13	146,54	−2,41	−1.66	2,06	1.42	0,93***
Pg-TL	141,52	143,08	−1,56	−1,10	1,88	1.32	0,93***	142,88	144,73	−1,85	−1.29	2,08	1.45	0,93***
Pg-GoR	101,27	97,60	3,67	3,69	4,42	4.45	0,45*	99,69	99,02	0,67	0.67	3,27	3.29	0,74**
Pg-GoL	101,40	96,47	4,93	4,98	4,28	4.33	0,47*	98,98	97,65	1,33	1.35	3,27	3.33	0,75**
Sn-Ls	13,56	13,66	−0,1	−0,73	1,20	8.82	0,83***	14,95	14,31	0,64	4.37	0,82	5.60	0,89***
Me–Li	34,11	33,36	0,75	2,22	1,25	3.71	0,84***	34,05	33,74	0,31	0.91	1,73	5.10	0,71*

*p < 0,05 **p < 0,001 ***p < 0,0001.

Realibility: ICC< 0,4 (Poor) 0,4 ≤ ICC < 0,75 (medium to good) ICC ≥ 0,75 (excellent).