Abstract
In order to trace the relationship between deciduous dentition and permanent dentition, we measured the maxillary basal arch length and the width of 3 stages, the deciduous first term, the deciduous last term and the permanent term. The materials consisted of 16 longtudinal ston cates of the normal occlusions and 8 longtudinal ston cates of the malocclusion.
The following conclusions were obtained:
1. Measuring of the basal arch width of the primary canine, showed that the malocclusion was smaller than the normal occlusion in deciduous last term.
2. In the normal occlusion, the basal arch width of the primary canine increased in the deciduous dentition.
3. In the malocclusion, no differences were observed in the width of the basal arches of the primary canine in the deciduous dentition.
4. Growth of the basal arch width of the primary canine, was a very important factor for the normal occlusion.
