Assessing the Correlation between Skeletal and Corresponding Soft-Tissue Equivalents to Determine the Relationship between CBCT Skeletal/Dental Dimensions and 3D Radiographic Soft-Tissue Equivalents

Table 3

Statistics of soft tissue distances and their CBCT equivalents, including average mean measurements, standard deviation, the difference between the average mean measurements, and the ratio of the CBCT distances to the soft-tissue distances in percentage format, values, and 95% confidence intervals of the differences between the facial scan and CBCT.

	Landmarks	Soft tissue measurements		CBCT hard tissue measurements		value	95% confidence interval of the differences (facial scan-CBCT)		Facial scanner and CBCT mean difference (mm)	Ratio of soft tissue and CBCT distances (%)
		Average mean (mm)	Standard deviation	Average mean (mm)	Standard deviation		Lower	Upper
1	Width of nose	25.26	2.53	21.65	3.33	0.001	−15.04	9.43	3.61	−14.29
2	Left canine to left outer eye	70.05	3.97	78.60	5.62	0.001	−17.70	−5.79	−8.55	+12.21
3	Right canine to right outer eye	70.47	4.49	77.90	5.33	0.001	−9.17	−5.68	−7.43	+10.54
4	Gnathion to throat	68.68	24.07	79.67	10.09	0.019	−20.88	−0.42	−10.99	+16.00
5	Gnathion to left gonion	101.68	8.37	79.92	7.72	0.001	21.59	31.86	21.76	−21.40
6	Gnathion to right gonion	100.56	8.33	79.77	6.03	0.001	21.11	31.55	20.79	−20.67
7	Left canine to left cheekbone	48.18	3.28	43.51	3.62	0.001	−7.04	8.58	4.67	−9.69
8	Right canine to right cheekbone	49.09	4.07	42.07	6.32	0.001	−20.36	16.31	7.02	−14.30
9	Nasion to gnathion	116.51	8.51	111.41	8.58	0.003	0.18	14.99	5.10	−4.38
10	Gnathion to left external auditory meatus (EAM)	128.58	12.71	120.86	9.25	0.001	−4.89	15.28	7.72	−6.00
11	Gnathion to right EAM	127.69	12.15	120.30	9.25	0.001	3.47	15.03	7.39	−5.79
12	Corners of mouth	47.43	4.80	35.67	3.74	0.001	−6.24	17.90	11.76	−24.79
13	Left EAM to left corner eye	80.71	5.52	72.88	5.10	0.001	0.29	10.71	7.83	−9.70
14	Right EAM to right corner eye	80.80	5.59	72.87	5.00	0.001	−1.95	10.40	7.93	−9.81
15	Bottom of nose to nasion	47.71	4.32	54.05	6.19	0.001	−8.87	−4.29	−6.34	+13.29
16	Width of left eye	30.94	2.28	38.43	2.79	0.001	−26.87	−1.01	−7.49	+24.21
17	Width of right eye	31.19	2.38	38.48	2.62	0.001	−8.30	−6.27	−7.29	+23.37
18	Left inner eye to left canine	63.27	4.46	70.51	5.48	0.001	−20.34	−2.78	−7.24	+11.44
19	Right inner eye to right canine	63.63	4.63	70.44	5.72	0.001	−43.33	5.63	−6.81	+10.70
20	Left gonion to left EAM	35.25	5.90	52.79	6.53	0.001	−26.02	−14.41	−17.54	+49.76
21	Right gonion to right EAM	34.88	5.17	53.34	7.38	0.001	−27.41	−14.06	−18.46	+52.92
22	Bottom of nose to left EAM	119.07	8.82	101.26	9.21	0.001	14.00	24.11	17.81	−14.96
23	Bottom of nose to right EAM	120.17	8.80	101.29	8.81	0.001	−11.12	30.86	18.88	−15.71
24	Left corner of mouth to left EAM	98.68	7.96	95.78	7.54	0.015	−6.78	6.25	2.90	−2.94
25	Right corner of mouth to right EAM	98.86	8.03	94.92	7.70	0.001	−0.19	7.08	3.94	−3.99
26	Width between outer eye corners	94.88	5.42	94.18	11.69	0.437	−7.03	10.41	0.70	−0.74
27	Left corner of mouth to left gonion	85.72	6.76	68.43	8.44	0.001	7.96	23.08	17.29	−20.17
28	Right corner of mouth to right gonion	84.42	7.15	67.76	6.11	0.001	15.41	20.23	16.66	−19.73
29	Bottom of nose to left gonion	109.42	8.33	86.10	9.35	0.001	21.29	32.56	23.32	−21.31
30	Bottom of nose to right gonion	110.41	8.98	87.26	8.93	0.001	19.84	33.63	23.15	−20.97