Table 3.

The Spearman correlation coefficients (r) between the first permanent molars and the second primary molars according to the surfaces.

Teeth no.	Surfaces	r	P value	Teeth no.	r	P value
16/55	M	0.00	0.936	26/65	−0.04	0.414
	O	0.15	0.001		0.13	0.006
	D	0.00	1.000		0.00	1.000
	B	0.08	0.076		0.09	0.040
	L	0.19	<0.0001		0.14	0.003
36/75	M	0.03	0.540	46/75	0.16	0.001
	O	0.19	<0.0001		0.23	<0.0001
	D	0.00	1.000		0.15	0.002
	B	0.25	<0.0001		0.22	<0.0001
	L	0.14	0.003		0.16	0.001