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Polynesian mandibles

P Houghton

    Journal of Anatomy
    |October 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Polynesian mandibles exhibit a rocker form due to cranial morphology, resulting in a small gonial angle. This unique bone structure makes a distinct angular process unnecessary for muscle attachment.

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    Area of Science:

    • Anthropology
    • Human Anatomy
    • Paleontology

    Background:

    • Adult Polynesian mandibles commonly display a rocker form.
    • Polynesian crania are characterized by an open cranial base angle and significant upper facial height.

    Purpose of the Study:

    • To investigate the mandibular morphology in adult Polynesians.
    • To understand the relationship between cranial base angle, facial height, and mandibular development.

    Main Methods:

    • Analysis of adult Polynesian skeletal remains.
    • Examination of cranial and mandibular morphology, including gonial angle and basal bone bowing.

    Main Results:

    • Mandibular growth rotations in Polynesians with open cranial bases lead to a small gonial angle.

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  • Increased 'bowing' of the mandibular basal component is observed.
  • Posterior displacement of the basal component reduces the need for a distinct angular process.

    • Conclusions:

    • The unique cranial morphology of Polynesians influences mandibular development.
    • The rocker form mandible with a small gonial angle is an adaptation to their specific craniofacial structure.