Table 4.

Results of the calculation of the dental age with the Demirjian method. The Wilcoxon test for paired data was applied by age groups and sex to compare the chronological age and dental age

Age groups	n	CA		DA Demirjian		p-value	CA-DA	Diff.SD	Trend
		mean	SD	mean	SD
Girls
4-6.9	59	6.46	0.48	7.48	0.82	0.000	-1.02	0.65	O
7-7.9	65	7.50	0.30	8.20	0.83	0.000	-0.69	0.78	O
8-8.9	69	8.45	0.28	8.92	0.79	0.000	-0.48	0.76	O
9-10.9	67	9.97	0.57	10.77	1.34	0.000	-0.80	1.18	O
11-13.9	42	12.14	0.63	12.84	1.28	0.000	-0.70	1.21	O
Total	302
Boys
4-6.9	63	6.40	0.55	7.28	1.09	0.000	-0.88	0.78	O
7-7.9	54	7.60	0.28	8.43	1.04	0.000	-0.84	0.99	O
8-8.9	67	8.45	0.29	9.03	0.87	0.000	-0.57	0.76	O
9-10.9	63	9.89	0.58	10.47	1.31	0.001	-0.59	1.63	O
11-13.9	55	12.15	0.60	12.65	1.00	0.000	-0.50	1.00	O
Total	302