Comparison and analysis of crown and cusp base area of the first molar crown by ancient Chinese crowds

doi:10.3969/j.issn.0529-1356.2013.04.021

Abstract

Abstract:

Objective To explore the differences of crown area of the first molar teeth and relative basal cusp area among the population of different feeding habits by measuring and analyzing crown basal area and relative basal cusp area of M¹
and M₁ of 184 teeth from five ancient Chinese archaeological sites. Methods High precision classification and measurement were done on crown area and cusp area by using the technology of modern digital image measurement, and data was detected and analyzed
by using spss 19.0. Results The crown area of teeth on M1 of crowds which took in high portion of animal food was obviously larger than crowds which had plant food. The test of heterogeneity indicated that there was significant difference on the crown
area between the two crowds. The relative basal cusp area of the two crowds had extraordinary similarity. The test of heterogeneity indicated no conspicuous difference. The order of the size of the first molar teeth of the ancient people in China which was
represented by five archaeological sites showed consistency, that the relative basal cusp areas exhibited a sequence of protocone> paracone>metacone>hypocone in M¹ and protocone>hypoconid>metaconid>entaconid>hypoconulid in M₁. Conclusion The size of crown
basal area of the first molar teeth shows diversity between groups, and the size of relative basal cusp area of the first molar teeth shows consistency between the groups.

Key words: Crown basal area, Relative basal cusp area, Food structure, Morphometry, Ancient crowd

ZHOU Ya-wei HE Le-tian*. Comparison and analysis of crown and cusp base area of the first molar crown by ancient Chinese crowds[J]. AAS, 2013, 44(4 ): 554-558.

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