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Related Experiment Videos

Aging of the rotator cuff.

B J Brewer

    The American Journal of Sports Medicine
    |March 1, 1979
    PubMed
    Summary

    Aging tendons show progressive degeneration in athletes, impacting supraspinatus tendon health. This study reveals age-related changes in tendon structure and bone attachment, crucial for understanding tendinitis.

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    Area of Science:

    • Orthopedics
    • Sports Medicine
    • Biogerontology

    Background:

    • Tendinitis significantly impacts athletes, posing long-term treatment challenges.
    • Understanding the aging process in tendons is critical for effective therapeutic strategies.

    Purpose of the Study:

    • To investigate age-related morphologic and degenerative changes in human tendons.
    • To correlate chronological age with structural alterations in the supraspinatus tendon and greater tuberosity.

    Main Methods:

    • Autopsy specimens from individuals aged 20, 50, and 70 years were analyzed.
    • Radiographic examination of the greater tuberosity morphology.
    • Histological staining (Safranin O, van Gieson, Hematoxylin & Eosin) to assess fibro-cartilage, Sharpey's fibers, cellularity, fiber integrity, and vascularity.

    Main Results:

    • Progressive osteitis, cystic degeneration, and irregular cortical margins of the greater tuberosity were observed with age.
    • Age-related degeneration included a deepened sulcus, disrupted Sharpey's fibers, reduced cellularity, fragmentation, and decreased vascularity and fibro-cartilage in the tendon.

    Conclusions:

    • Chronological aging leads to significant morphologic changes and degeneration of the supraspinatus tendon and its bony attachment.
    • These age-induced changes likely contribute to the increased incidence and severity of tendinitis in older individuals and athletes.

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