Dental Maturity in Saudi Children Using the Demirjian Method: A Comparative Study and New Prediction Models

Table 2

Mean difference (±standard deviation) between dental age based on the Demirjian method and chronological age as determined by the different methods in boys.

Age group (𝑛)	French-Canadian (SD)	Belgian (SD)	Kuwaiti (SD)	Saudi (SD)
4-5 (7)	0.75 (0.18)	−1.26 (0.53)	0.03 (0.17)	NA
5-6 (12)	0.82 (0.78)	0.11 (1.67)	0.04 (0.79)	NA
6-7 (26)	1.04 (0.35)	1.57 (0.96)	0.51 (0.70)	NA
7-8 (28)	0.66 (0.42)	2.11 (1.01)	0.60 (0.69)	1.68 (0.00)
8-9 (26)	0.69 (0.98)	2.81 (1.33)	0.85 (0.92)	1.22 (0.77)
9-10 (30)	0.97 (0.84)	3.23 (0.82)	0.83 (0.57)	0.95 (0.68)
10-11 (30)	1.21 (0.56)	3.05 (0.48)	0.60 (0.48)	0.80 (0.43)
11-12 (16)	0.17 (1.05)	2.14 (0.65)	−0.39 (0.62)	−0.19 (0.67)
12-13 (30)	0.69 (1.18)	1.91 (0.53)	−0.20 (1.15)	−0.19 (0.88)
13-14 (12)	−0.12 (0.69)	1.20 (0.86)	−1.51 (0.63)	−1.22 (0.41)
Total (217)	0.76 (0.85)	2.12 (1.36)	0.30 (0.96)	0.40 (1.00)