A Morphological Study on the Dentition Using Fourier Analysis

The Relationship between Deciduous Dentition and Permanent Dentition.

Abstract

Fourier analysis was used to compare the forms of the coronal and basal arches of the deciduous dentition and the permanent dentition of the normal occlussion. The materials consisted of 16 longtudinal ston casts.
The following conclusions were obtained;
1. The maxillary coronal arches showed individual variation in the permanent dentition, but the maxillary and mandibular basal arch showed in individual variation in both the deciduous dentition and the permanent dentition.
2. The average form of the maxillary coronal arch the permanent dentition was larger than that of the deciduous dentition in size and the shapes was similar to a semicircle. No differences were the observed in the average form of the mandibular coronal arch between the deciduous dentition and The permanent dentition.
3. Denfinitive differences in size were observed in the maxillary basal arch between the deciduous dentition and the but no permanent dentition differences in size were observed in the mandibular basal arch.