Crown Diameters of Corresponding Tooth Groups in the Deciduous and Permanent Dentition

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Abstract
From longitudinal data, the combined mesiodistal crown diameters of tooth groups in the deciduous and permanent dentitions were determined (di1+di2, l1+l2. and de+dm1+dm2, C+Pm1+Pm2). In males, the permanent incisors are 3.7 and 2.6 mm larger on the average than their deciduous predecessors in maxilla and mandible, respectively. The corresponding mean findings in females are 3.3 and 2.6 mm. The deciduous canines and molars are succeeded by permanent teeth with a smaller combined mesiodistal crown deameter. In the maxilla, 1.2 mm becomes available in males and 1.5 mm in females while in the mandible this space amounts to 2.2 and 2.6 mm, respectively. Marked individual differences are reported both in the differences in tooth size of corresponding tooth groups, as well as in the absolute measurements. The correlation coefficient range from +0.31 to +0.59 confirming no more than a low to medium association in the size of deciduous and permanent tooth groups.

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