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Related Experiment Videos

Secular trends in face size.

B H Smith, S M Garn, W S Hunter

    The Angle Orthodontist
    |July 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Adult children exhibit deeper, longer, and narrower facial structures compared to their parents, indicating a secular trend in craniofacial development. This study highlights generational differences in facial morphology.

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    Area of Science:

    • Anthropology
    • Genetics
    • Orthodontics

    Background:

    • Secular trends in human physical characteristics are well-documented.
    • Craniofacial morphology is influenced by both genetic and environmental factors.
    • Previous studies have indicated changes in body size and proportions over generations.

    Purpose of the Study:

    • To investigate secular trends in facial dimensions (depth, height, breadth) between parents and their adult children.
    • To compare craniofacial morphology across generations.
    • To identify specific directional changes in facial features.

    Main Methods:

    • Radiographic analysis (lateral and postero-anterior views) of parents and their adult offspring.
    • Comparative statistical analysis of facial measurements.

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  • Assessment of facial depth, height, and breadth.

    • Main Results:

    • A significant differential secular trend was observed in facial dimensions.
    • Adult children presented with statistically deeper, longer, and narrower faces compared to their same-sex parents.
    • These findings suggest a consistent generational shift in craniofacial structure.

    Conclusions:

    • Generational differences in facial morphology are evident, with contemporary adults exhibiting distinct craniofacial characteristics.
    • The observed trends in facial depth, height, and breadth indicate ongoing evolutionary or adaptive changes.
    • Further research is warranted to explore the underlying causes of these craniofacial secular trends.