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[Sub-astragalar articulation: functional approach using load imprints].

P Le Floch-Prigent

    Bulletin De L'Association Des Anatomistes
    |March 1, 1983
    PubMed
    Summary
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    The subtalar joint experiences increased incongruency during inversion and eversion. Maximal contact occurs in a fixed mid-position, crucial for pressure transmission during gait.

    Area of Science:

    • Biomechanics
    • Orthopedics
    • Anatomy

    Context:

    • The subtalar joint's complex mechanics are critical for foot function during locomotion.
    • Understanding subtalar joint articulation is essential for diagnosing and treating foot and ankle pathologies.

    Purpose:

    • To investigate the contact areas and congruency of the subtalar articulation in various positions.
    • To determine the subtalar joint's role in pressure transmission during the gait cycle.

    Summary:

    • Articular surfaces of the subtalar joint were analyzed using Safranin 0 staining under pressure in a fixed position.
    • Increased incongruency was observed during inversion and eversion, with maximal contact in a passively blocked mid-position.
    • The mid-position is vital for transmitting pressure during gait when the talocrural joint is active.

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    Impact:

    • Findings highlight the significance of the subtalar joint's mid-position for load-bearing during walking.
    • Identifies inversion as a key movement for the foot when not in contact with the ground.
    • Provides insights into subtalar joint function relevant to biomechanical analysis and clinical practice.