Comparative study of the upper molar occlusal table morphology among seven human populations
Abstract Three‐dimensional morphology of the occlusal table of the upper first molars was compared in seven racial populations. Materials were moiré contourograms collected by ourselves over 5 years. Intercuspal distances and cuspal heights were comparatively studied in this analysis. When the popul...
| Published in: | American Journal of Physical Anthropology |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1988
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1002/ajpa.1330770215 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fajpa.1330770215 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ajpa.1330770215 |
| Summary: | Abstract Three‐dimensional morphology of the occlusal table of the upper first molars was compared in seven racial populations. Materials were moiré contourograms collected by ourselves over 5 years. Intercuspal distances and cuspal heights were comparatively studied in this analysis. When the populations were arranged in the order of these sizes, their arrangements based on intercuspal distances and cuspal heights were quite different from each other. When intercuspal distances were scaled by protocone‐paracone distance, the distances connecting distal cusps were significantly smaller in Mongoloids (Japanese and Eskimo) than in Caucasoids (Dutch and Asiatic Indian), which suggests a reduction tendency of distal cusps in Mongoloids. This tendency was intermediate in Negroids and Australoid. Principal coordinate analysis was carried out on the basis of a similarity matrix including both intercuspal distances and cuspal heights. The result suggested that the three‐dimensional shape of the occlusal table was distinguishable in four representative racial populations. |
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