Article2007

Correlations between deciduous and permanent tooth morphology in a European American sample

50 citations0/0 files storedAmerican Journal of Physical Anthropology

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Forensic Anthropology and Bioarchaeology Studies dental development and anomalies Morphological variations and asymmetry

Abstract

The expression of dental morphological characteristics is partially genetically controlled, and is assumed to be similar in deciduous and permanent dentitions. However, there are few published data comparing normal morphological variation between the two dentitions in the same individual. For the current study, data were collected from European Americans (N = 54) whose teeth were cast both as children and adults. We observed 19 trait expressions in deciduous and permanent dentitions. Deciduous traits were scored based on Hanihara's and Sciulli's descriptions, while permanent teeth were scored using the ASU dental anthropology system. The two dentitions' scores were compared using Goodman-Kruskal's Gamma (gamma) in the original, commonly used systems as well as in a new, shared scale to which the scores were converted. Observations were also dichotomized in both formats and compared using tetrachoric correlation. We expected high correlations between the two dentitions and for both statistics to yield similar results. For the original scores, gamma correlations vary from -1.0 to 0.68; tetrachoric correlations vary from 0.04 to 0.67. For the shared scale scores, gamma correlations range from -1.0 to 1.0 and tetrachoric correlations range between -0.47 and 0.8. Several traits showed no correlation in either test. Overall, categorical data analysis returned more positive moderate to high correlations than tetrachoric correlation analysis, and shared scale tests resulted in more correlations than did tests of data in the original scoring systems. These results reflect differences in commonly used scoring systems, variation in rarely occurring traits, different strengths of trait expression, and complex genetic/environmental interactions.

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References

1991Advances in dental anthropology 1996Dental Anthropology 1997The Anthropology of Modern Human Teeth 1998The anthropology of modern human teeth: dental morphology and its variation in recent human populations 1990Major features of Sundadonty and Sinodonty, including suggestions about East Asian microevolution, population history, and late Pleistocene relationships with Australian Aboriginals 1963ANALYSIS OF THE AMERICAN INDIAN DENTITION 1997Characteristic high- and low-frequency dental traits in sub-Saharan African populations 1980Population variation of Carabelli's trait.

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2014Taxonomic differences in deciduous upper second molar crown outlines of Homo sapiens, Homo neanderthalensis and Homo erectus 2016A Brief History of Biological Distance Analysis 2017Comparative performance of deciduous and permanent dental morphology in detecting biological relatives 2014Expression of Carabelli trait in children from Southern India - A cross sectional study 2018Observer error and its impact on ancestry estimation using dental morphology

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