Upper Lateral Incisor Variability and the Size of the Remaining Teeth

Abstract

The mesiodistal crown diameters were measured on the dentition of three groups in the Pima Indians. The first group (Group N) carries the upper lateral incisors of normal shape, the second (Group R) those incisors of reduced or conical shape, and the third (Group M) malformed or over-developed type of incisors. The three groups showed more or less extent of differences as a whole, namely, Group R is smaller and Group M is larger than the Group N. These differences were also analysed by the technique of multivariate analysis and the significance related to the human dental evolution was discussed.