Related Experiment Videos
Developmental correlates of crown component asymmetry and occlusal discrepancy
American Journal of Physical Anthropology
|May 1, 1981
Summary
Dental cusp asymmetry may indicate developmental disruption. Environmental factors, especially prenatal, significantly influence this asymmetry in permanent first molars, more so than occlusal discrepancy.
Area of Science:
- Anthropology
- Genetics
- Developmental Biology
Background:
- Dental asymmetry is a complex trait.
- Understanding its developmental correlates is crucial for identifying potential health indicators.
Purpose of the Study:
- To investigate dental asymmetry and discrepancy in permanent first molars using detailed crown component measurements.
- To correlate these dental measures with developmental stress indicators like zygosity, birth weight, and congenital disease.
Main Methods:
- Analysis of permanent first molar crown components in 192 twin pairs.
- Application of statistical methods to assess asymmetry and occlusal discrepancy.
- Correlation analysis with zygosity, birth weight, and congenital disease data.
Main Results:
- Developmental correlates were significantly associated with dental asymmetry.
- Occlusal discrepancy was found to be a direct function of bilateral asymmetry.
- Environmental influences, particularly prenatal, appear greater for antimeric units than occluding units.
Conclusions:
- Individual cusp asymmetry may serve as a sensitive indicator of developmental disruption.
- Environmental factors play a substantial role in dental asymmetry, with prenatal influences being particularly significant.