Table 2.

Distribution of treatment methods.

	Cone beam	3D model	CT image	Surface tomography	Image comparison	Computer image
First hospital	31	36	31	35	23	21
Second hospital	36	28	24	28	22	32
Third hospital	42	27	44	28	24	34
Fourth hospital	49	44	34	32	29	43
Fifth hospital	29	37	43	45	35	25
Sixth hospital	27	35	39	42	27	24