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Related Experiment Videos

Anatomic variance of the coracoclavicular ligaments.

R I Harris1, D H Vu, D H Sonnabend

  • 1Orthopaedic Research Laboratories, Prince of Wales Hospital, and the School of Anatomy, University of New South Wales, Randwick, Sydney, Australia.

Journal of Shoulder and Elbow Surgery
|December 18, 2001
PubMed
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The coracoclavicular ligaments show significant anatomical variation, impacting surgical procedures. Understanding these variations, like conoid ligament types, is crucial for safe distal clavicle resection in shoulder injuries.

Area of Science:

  • Orthopedic anatomy
  • Human cadaveric studies
  • Surgical anatomy

Background:

  • Coracoclavicular ligaments are vital for shoulder stability.
  • Existing anatomical descriptions of these ligaments lack detail and contain discrepancies.
  • Variations in coracoclavicular ligament anatomy can complicate surgical interventions.

Purpose of the Study:

  • To meticulously examine the complex anatomy of the coracoclavicular ligaments.
  • To quantify geometric dimensions and identify inter-specimen variations.
  • To relate ligamentous anatomy to clinically significant bony landmarks.

Main Methods:

  • Analysis of 24 fresh human cadaveric shoulder specimens.
  • Detailed measurement of coracoclavicular ligament dimensions (13 measurements).

Related Experiment Videos

  • Assessment of coracoid insertions and relationships with adjacent structures.

    • Main Results:

    • High variance observed in conoid ligament coracoid insertions (33% confluent with superior transverse scapular ligament).
    • 15% of specimens showed an additional lateral fascicle.
    • Identified three new conoid ligament variants (Types I, II, III) and an average distance of 15.3 mm from trapezoid ligament to distal clavicle.

    Conclusions:

    • The coracoclavicular ligaments exhibit significant anatomical variability.
    • A 15 mm safety margin for distal clavicle resection is proposed to protect these ligaments in acromioclavicular joint injuries.
    • Classification of conoid ligament variants aids in understanding anatomical differences.