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[Functional adaptation processes of gliding tendons]

B Tillmann1, S Koch

  • 1Anatomisches Institut, Christian-Albrechts-Universität zu Kiel.

Sportverletzung Sportschaden : Organ Der Gesellschaft Fur Orthopadisch-Traumatologische Sportmedizin
|June 1, 1995
PubMed
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Fibrocartilage in supraspinatus and biceps tendons is a normal adaptation to stress, not pathology. This avascular area correlates with rupture sites, suggesting excessive tensile stress causes tendon tears.

Area of Science:

  • Orthopedic Surgery
  • Sports Medicine
  • Anatomy

Background:

  • Tendon ruptures of the supraspinatus and biceps brachii are common injuries.
  • Understanding the structural and vascular properties of these tendons is crucial for explaining injury mechanisms.

Purpose of the Study:

  • To analyze the structure and blood supply of the inserting tendons of supraspinatus and biceps brachii.
  • To investigate the relationship between tendon structure, fibrocartilage presence, avascular zones, and tendon rupture locations.

Main Methods:

  • Histological analysis of tendon samples.
  • Injection techniques to visualize blood supply.
  • Immunohistochemical methods to identify specific tissue components.

Main Results:

Related Experiment Videos

  • The investigated tendons exhibit fibrocartilage, particularly on the pulley-adjacent side, which is a physiological adaptation to pressure and shear forces.
  • An avascular zone was identified in the pulley-adjacent part of the tendons, corresponding in size to the fibrocartilage.
  • The location of tendon ruptures closely matched the areas of fibrocartilage and avascularity.

Conclusions:

  • Fibrocartilage and avascularity in these tendons are normal structural adaptations, not pathological findings.
  • Excessive tensile stress, exceeding the capacity of gliding tendons, likely contributes to the development of supraspinatus and biceps tendon ruptures, especially in sports contexts.