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Molar size sequence in Australian Aboriginals.
American Journal of Physical Anthropology
|January 1, 1983
Summary
Molar size patterns in Australian Aboriginals align with global data, suggesting environmental factors significantly influence tooth development. This research highlights the role of local conditions in shaping molar size sequences.
Area of Science:
- Human biology
- Anthropology
- Odontology
Background:
- Molar tooth size and its developmental sequence are important anthropological markers.
- Understanding variations in molar size can provide insights into population genetics and environmental adaptations.
Purpose of the Study:
- To analyze the molar size sequence (M1 vs. M2) in contemporary Australian Aboriginals.
- To compare these findings with other global populations and investigate sex and arch differences.
Main Methods:
- Calculated percentage frequencies of molar size sequences using mesiodistal and buccolingual dimensions, and crown areas.
- Compared data within the Aboriginal group (sex, arches, dimensions) and with published data from other populations.
Main Results:
- The frequency of the M2 > M1 molar size sequence in Australian Aboriginals falls within the range observed in other contemporary populations.
- Significant differences in M2 > M1 frequencies were noted between sexes and dental arches within the Aboriginal group.
- A relatively high frequency of asymmetry in molar size sequence was observed in Australian Aboriginals.
Conclusions:
- Observed molar size patterns in Australian Aboriginals are consistent with global trends.
- Environmental factors during odontogenesis and differential responses to other environmental influences are crucial in determining molar tooth size patterns.
- The findings support the hypothesis that local environmental conditions play a significant role in shaping dental morphology.