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Molar size sequence in American Blacks
Journal of Dental Research
|February 1, 1981
Summary
The molar size sequence (MSS) shows a high prevalence of second molars larger than first molars in both American Blacks and Whites. This finding suggests MSS is not a primitive trait in modern populations.
Area of Science:
- Anthropology
- Human Biology
- Dental Morphology
Background:
- Molar Size Sequence (MSS) is a dental morphological trait.
- Previous studies have explored MSS in various populations.
Purpose of the Study:
- To present data on Molar Size Sequence (MSS) in American Blacks.
- To compare MSS data between American Blacks and American Whites.
Main Methods:
- Data collection on molar dimensions.
- Statistical comparison of M2 > M1 incidences between ethnic groups.
Main Results:
- A high percentage of M2 > M1 (second molar larger than first molar) observed in both American Blacks and Whites.
- Maxillary M2 > M1 incidence is significantly higher in American Whites than American Blacks.
- Mandibular M2 > M1 incidence is significantly higher in American Blacks than American Whites.
Conclusions:
- The M2 > M1 molar sequence is not a primitive trait, as it appears in a significant percentage of modern populations.
- Ethnic variations in M2 > M1 prevalence exist between American Blacks and Whites, particularly in the maxillary and mandibular arches.