Table 3. Comparison of the tooth width measurements between the plaster models and intraoral scans.

Measurements (mm)	Plaster model		Intraoral scan		Difference		P value
	Mean	SD	Mean	SD	Mean	SD
Maxilla
Central incisor, right	8.20	0.41	8.15	0.34	0.05	0.13	0.207
Central incisor, left	8.17	0.54	8.14	0.46	0.03	0.20	0.564
Lateral incisor, right	7.15	0.52	6.94	0.46	0.02	0.27	0.134
Lateral incisor, left	7.10	0.30	7.04	0.36	0.06	0.21	0.303
Canine, right	7.93	0.41	7.84	0.45	0.09	0.20	0.169
Canine, left	7.77	0.35	7.76	0.38	0.01	0.20	0.840
1st premolar, right	7.35	0.34	7.35	0.38	0.00	0.16	0.922
1st premolar, left	7.37	0.28	7.35	0.28	0.02	0.11	0.178
2nd premolar, right	7.02	0.36	6.98	0.36	0.04	0.12	0.621
2nd premolar, left	7.05	0.26	7.07	0.23	-0.02	0.15	0.652
1st molar, right	9.98	0.44	9.94	0.50	0.04	0.19	0.425
1st molar, left	9.99	0.50	9.90	0.60	0.09	0.20	0.133
Mandible
Central incisor, right	5.36	0.28	5.32	0.29	0.04	0.12	0.236
Central incisor, left	5.37	0.34	5.30	0.34	0.07	0.15	0.097
Lateral incisor, right	5.96	0.29	5.89	0.26	0.07	0.08	0.099
Lateral incisor, left	5.97	0.33	5.99	0.32	-0.02	0.15	0.694
Canine, right	6.89	0.48	6.88	0.47	0.01	0.13	0.892
Canine, left	6.87.	0.40	6.81	0.39	0.02	0.15	0.634
1st premolar, right	7.21	0.45	7.23	0.38	-0.02	0.19	0.701
1st premolar, left	7.23	0.44	7.15	0.39	0.08	0.17	0.388
2nd premolar, right	7.24	0.35	7.20	0.42	0.04	0.16	0.092
2nd premolar, left	7.16	0.40	7.16	0.42	0.00	0.18	0.920
1st molar, right	11.27	0.62	11.29	0.52	-0.02	0.18	0.605
1st molar, left	11.18	0.53	11.16	0.46	0.02	0.13	0.570

SD, Standard deviation.

P values were obtained from paired t-test.