Mechanical environment of the supraspinatus tendon: A two-dimensional finite element model analysis

Ikuko Wakabayashi, Eiji Itoi, Hirotaka Sano, Yotsugi Shibuya, Ryuji Sashi, Hiroshi Minagawa, Moto Kobayashi

    Research output: Contribution to journalArticlepeer-review

    60 Citations (Scopus)

    Abstract

    We performed 2-dimensional finite element model analysis to estimate the mechanical environment of the supraspinatus tendon. The geometric shape of the finite element model was determined by magnetic resonance imaging of a normal human shoulder obtained at 0°, 30°, and 60° of abduction, whereas the histologic location of noncalcified and calcified fibrocartilage was determined from a cadaveric specimen. The supraspinatus tendon was pulled proximally with the force of 10 N at 0°, 53 N at 30°, and 115 N at 60° of abduction. The area of high principal stress maximum was observed on the articular side of the supraspinatus tendon, which shifted toward the insertion as the arm was abducted. High stress concentration on the articular side of the supraspinatus tendon near its insertion during arm elevation may explain the frequent occurrence of rotator cuff tears at this site.

    Original languageEnglish
    Pages (from-to)612-617
    Number of pages6
    JournalJournal of Shoulder and Elbow Surgery
    Volume12
    Issue number6
    DOIs
    Publication statusPublished - 2003

    ASJC Scopus subject areas

    • Surgery
    • Orthopedics and Sports Medicine

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