Predicting the Mesiodistal Crown Dimensions of the Permanent First Molars from the Deciduous Second Molars

Table 3

Relation between the mesiodistal widths of the permanent first molars and primary second molars and regression equations for prediction.

Genders	Tooth	r	value	Equation
Males	Maxillary 6	0.352	0.012	Y = 7.361 + 0.347X
	Mandibular 6	0.591	0.000	Y = 5.238 + 0.553X
Females	Maxillary 6	0.409	0.003	Y = 5.999 + 0.464X
	Mandibular 6	0.312	0.027	Y = 8.053 + 0.265X

Y = mesiodistal widths of the permanent first molars, X = mesiodistal widths of the primary second molars.