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Changing occlusal variation in Pima Amerinds.

R S Corruccini, R H Potter, A A Dahlberg

    American Journal of Physical Anthropology
    |November 1, 1983
    PubMed
    Summary
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    Modern diets negatively impact dental occlusion in Pima Amerind youth, leading to greater variability from ideal occlusion and narrower palates compared to older generations. Dietary shifts significantly affect oral development.

    Area of Science:

    • Anthropology
    • Dentistry
    • Human Evolution

    Background:

    • Dietary changes in industrialized populations are linked to alterations in craniofacial development.
    • Traditional diets may promote different occlusal development compared to modern, refined diets.

    Purpose of the Study:

    • To investigate the impact of traditional versus modern diets on occlusal variables and arch measurements in Pima Amerinds.
    • To compare dental occlusion and palate width between younger, urbanized individuals and older, traditionally-raised individuals.

    Main Methods:

    • Occlusal variables and arch measurements were recorded from 341 Pima Amerinds.
    • Participants were divided into two groups: older individuals on traditional diets and younger individuals on refined commercial foods.
    • Statistical analysis compared occlusal variability and arch dimensions between the two samples.

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    Main Results:

    • The younger sample, consuming refined diets, exhibited significantly more variable permanent dental occlusion compared to defined ideals.
    • Youths in the younger sample had narrower palates, consistent with trends in industrialized populations and animals fed soft diets.
    • The rate of deciduous tooth loss and replacement did not correlate with any measured occlusal variables.

    Conclusions:

    • Modern, refined diets are associated with increased occlusal variability and narrower palates in Pima Amerind youth.
    • Dietary shifts towards softer, processed foods may influence dental arch development and occlusal outcomes.
    • Further research is needed to understand the long-term implications of these dietary-driven changes in oral morphology.