Table 10.

Comparison of the difference of estimated and actual tooth models in root axis angle to occlusal plane between manual and deep learning methods (unit: degree)

Difference of estimated and actual tooth models	Manual method	Deep learning method	P value*
	Mean ± SD	Mean ± SD
Maxilla
Incisors	− 0.44 ± 2.61	− 0.43 ± 2.55	0.992
Canine	− 0.27 ± 2.75	0.39 ± 1.85	0.533
Second premolar	0.06 ± 2.89	0.68 ± 2.57	0.554
First molar	− 0.45 ± 4.18	2.41 ± 2.74	0.088
Mandible
Incisors	− 0.19 ± 1.83	− 2.81 ± 2.76	0.002*
Canine	0.64 ± 1.81	− 1.09 ± 2.59	0.090
Second premolar	0.82 ± 3.42	1.70 ± 4.01	0.200
First molar	− 0.92 ± 2.87	− 1.50 ± 5.02	0.714

SD, Standard deviation

*The results of paired t test