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Distal tibiofibular ligaments. Analysis of function

O Rasmussen, I Tovborg-Jensen, S Boe

    Acta Orthopaedica Scandinavica
    |August 1, 1982
    PubMed
    Summary

    The anterior tibiofibular ligament and distal tibiofibular ligaments have minimal impact on ankle mobility when injured alone. Significant instability, particularly external rotation, occurs when combined with deltoid or posterior talofibular ligament damage.

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    Area of Science:

    • Orthopedics
    • Biomechanics
    • Anatomy

    Background:

    • The distal tibiofibular syndesmosis is crucial for ankle stability.
    • Understanding the specific roles of its ligaments is essential for diagnosing and treating ankle injuries.

    Purpose of the Study:

    • To elucidate the function of the anterior tibiofibular ligament, distal tibiofibular syndesmosis, and posterior tibiofibular ligament.
    • To determine the contribution of these ligaments to ankle joint mobility.

    Main Methods:

    • Utilized eighteen osteoligamentous preparations.
    • Traced mobility patterns before and after sequential transection of specific ligaments.

    Main Results:

    • Isolated transection of the anterior tibiofibular ligament had minimal effect on mobility.
    • Complete transection of distal tibiofibular ligaments caused only minor motion abnormalities.
    • External rotation significantly increased with additional cutting of the anterior deltoid or posterior talofibular ligaments.

    Conclusions:

    • Isolated anterior tibiofibular ligament injury is likely rare.
    • Total rupture of distal tibiofibular structures often involves concurrent injury to the anterior deltoid and/or posterior talofibular ligaments.
    • These combined injuries are critical for significant ankle instability.

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