Morphological Evaluation of Deciduous teeth in Children in Shanghai

-Regarding the deciduous molar crowns-

Abstract

We performed dental examinations on kindergarten children in Shanghai, China. Using upper and lower dental casts obtained from the children, we anatomically observed the morphology of the deciduous molar crowns. We evaluated the results compared to those in past reports and obtained the following conclusions.
1. Among the deciduous molar teeth observed, there were no differences between Japanese and Chinese children in the crown occlusal surface patterns.
2. The incidence of the protoconule, metaconule, and crista obliqua in the upper deciduous molars of children in Shanghai was lower than that in Shijiazhuang.
3. The incidence of the moon-shaped ridge on the upper molar buccal surface and the cingulum in maxillary deciduous first molars of children in Shanghai was higher than that in Shijiazhuang.
4. There were no differences in the incidence of the mesial tubercle, the 6 th and 7 th cusps in mandibular deciduous second molars, and the cingulum in mandibular deciduous first molars observed between the Chinese children in Shanghai and Shijiazhuang.
5. It could not be determined whether there were differences in the proportions of the anterior occlusal measurement with respect to the posterior one in mandibular deciduous first molars between the Chinese children in Shanghai and Shijiazhuang.