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Medial canthal tendon branches out

R L Anderson

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |November 1, 1977
    PubMed
    Summary

    A newly discovered branch of the medial canthal tendon offers superior support to the eye

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    Area of Science:

    • Anatomy
    • Ophthalmology
    • Surgical Anatomy

    Background:

    • The medial canthal tendon (MCT) is crucial for maintaining the anatomical position of the medial canthus.
    • The anterior and posterior limbs of the MCT have distinct anatomical and functional characteristics.
    • Current understanding of MCT support primarily focuses on its anterior and posterior portions.

    Purpose of the Study:

    • To describe a previously unrecognized superior supporting branch of the medial canthal tendon.
    • To elucidate the anatomical connections and potential functional significance of this new branch.
    • To re-evaluate the biomechanical support of the medial canthus in light of this finding.

    Main Methods:

    • Detailed cadaveric dissection of the orbital and periorbital structures.
    • Macroscopic anatomical description and illustration of the identified tendon branch.
    • Comparison of the novel branch with the known anterior and posterior limbs of the MCT.

    Main Results:

    • A previously undescribed superior supporting branch of the medial canthal tendon was identified.
    • This superior branch connects the common tendon insertion to the frontal bone, providing direct superior support.
    • The posterior limb of the MCT was noted to be relatively thin and weak compared to its anterior counterpart.

    Conclusions:

    • The newly identified superior supporting branch likely plays a significant role in maintaining medial canthal position.
    • This branch may be critical for canthal stability, particularly following trauma or surgery involving the anterior MCT.
    • The findings necessitate a revision of the anatomical understanding and biomechanical support of the medial canthus.

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