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¿La naturaleza, la educación o el ruido? La asimetría fluctuante en las denticiones permanentes depende de la
Emily Moes1, Heather Jh Edgar2
1Department of Anthropology, University of Texas at San Antonio, San Antonio, TX, United States; Center for Archaeological Research, University of Texas at San Antonio, San Antonio, TX, United States; Department of Anthropology, University of New Mexico, Albuquerque, NM, United States.
Archives of oral biology
|February 12, 2026
Resumen
La asimetría fluctuante dental (FA) refleja la inestabilidad del desarrollo. Los índices FA que utilizan mediciones molares, pero no las dimensiones de la corona, están relacionados con el estrés en la vida temprana en las hembras, lo que sugiere que la plasticidad del rasgo es clave.
Área de la Ciencia:
- Biología humana Biología humana.
- Biología del desarrollo Biología del desarrollo.
- La Antropología Antropología Antropología.
Sus antecedentes:
- La asimetría fluctuante dental (FA) es un indicador propuesto de inestabilidad del desarrollo.
- La asociación de la FA con el estrés de la vida temprana varía, potencialmente debido a los rasgos específicos medidos.
- Comprender esta variación puede aclarar la utilidad de la FA en la evaluación de trastornos del desarrollo.
Objetivo del estudio:
- Investigar si la variación en la relación de la FA dental con el estrés en la vida temprana se explica por ventanas de desarrollo sensibles o susceptibilidad a rasgos.
- Para diferenciar el impacto de la plasticidad del rasgo frente a los componentes genéticos en las mediciones de FA.
Principales métodos:
- Se midieron las dimensiones de los dientes permanentes y las distancias intercuspales molares en 303 niños.
- Se crearon seis índices de FA basados en el desarrollo de rasgos y la susceptibilidad.
- Se analizaron las asociaciones entre los factores bioculturales y los índices de FA, estratificados por sexo.
Principales resultados:
- Los índices de FA basados en las distancias intercuspales molares mostraron asociaciones significativas con factores bioculturales solo en las hembras.
- No se encontraron asociaciones significativas entre los índices de FA y los factores bioculturales en los machos.
- Los resultados del modelo diferían según el índice FA específico y el sexo.
Conclusiones:
- La elección de los rasgos dentales afecta significativamente la capacidad de la FA para reflejar el estrés de la vida temprana.
- Los rasgos con mayor plasticidad (por ejemplo, las distancias molares intercuspales) son más sensibles a las alteraciones del desarrollo que aquellos con mayor influencia genética (por ejemplo, las dimensiones de la corona).
- El ruido del desarrollo puede contribuir a una inexplicable variabilidad en la FA dental.
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