Table 2.

The mean percentages of ICDAS codes in the upper and lower first permanent molars and second primary molars according to tooth surfaces.

	ICDAS codes
	0	1	2	3	4	5	6
16/26
M	97.7	0.3	0.4	0.3	0.0	0.2	0.0
O	62.5	12.4	17.0	4.8	0.8	1.4	0.0
D	99.0	0.0	0.0	0.0	0.0	0.0	0.0
B	91.5	2.2	4.8	0.3	0.0	0.1	0.0
L	83.4	4.7	9.0	1.0	0.3	0.5	0.0
55/65
M	81.8	0.4	1.5	1.0	1.4	4.3	5.4
O	69.4	5.1	10.2	3.5	1.0	2.9	2.3
D	93.4	0.1	0.1	0.7	0.3	1.2	4.0
B	90.9	0.6	1.4	0.3	0.1	0.4	2.1
L	83.9	2.2	3.1	2.1	0.5	0.8	3.3
36/46
M	94.6	0.3	3.6	0.4	0.0	0.2	0.2
O	68.8	7.5	13.6	6.4	1.1	1.5	0.3
D	99.1	0.0	0.0	0.1	0.0	0.0	0.1
B	64.5	9.4	16.3	7.3	0.6	0.9	0.2
L	97.3	0.5	1.3	0.0	0.0	0.0	0.1
75/85
M	72.9	0.9	5.0	3.0	0.5	3.7	5.6
O	66.6	4.1	8.9	3.5	1.0	2.2	5.3
D	82.9	0.3	1.0	0.0	0.0	1.2	6.0
B	68.0	3.3	13.1	2.0	0.1	0.5	3.5
L	85.0	0.2	0.8	0.1	0.1	0.4	4.9