The function of the acromioclavicular and coracoclavicular ligaments in shoulder motion: A whole-cadaver study

Satoshi Oki, Noboru Matsumura, Wataru Iwamoto, Hiroyasu Ikegami, Yoshimori Kiriyama, Toshiyasu Nakamura, Yoshiaki Toyama, Takeo Nagura

研究成果: Article査読

35 被引用数 (Scopus)

抄録

Background: Scapulothoracic dyskinesis is an important consequence of acromioclavicular joint dislocations. However, no reports have described changes in 3-dimensional motions of the scapula and clavicle with respect to the thorax caused by acromioclavicular joint dislocation. Hypothesis: Sectioning of the acromioclavicular (AC) and coracoclavicular (CC) ligaments affects scapular and clavicular motion in a whole-cadaver model. Study Design: Controlled laboratory study. Methods: We evaluated shoulder girdle motion (scapula, clavicle, and humerus) relative to the thorax of 14 shoulders from 8 whole cadavers after sequential sectioning of the AC and CC ligaments (trapezoid and conoid ligaments). An electromagnetic tracking device measured 3-dimensional kinematics of the scapula and clavicle during humerothoracic elevation in the coronal and sagittal planes and adduction in the horizontal plane. Results: Sectioning of the AC ligament increased clavicular retraction during sagittal plane elevation and horizontal plane adduction. Sectioning of the trapezoid ligament decreased scapular external rotation during sagittal plane elevation and horizontal plane adduction. Sectioning of the conoid ligament decreased scapular posterior tilting during sagittal plane elevation and horizontal plane adduction. Acromioclavicular and CC ligament sectioning also delayed clavicular posterior rotation and increased clavicular upward rotation during coronal plane elevation. Conclusion: Our study revealed that AC and CC ligament disruption affected in vitro shoulder girdle kinematics in the wholecadaver model. Clinical Relevance: The results of this cadaveric study revealed that AC and CC ligament disruption could cause dyskinesis of the scapula and clavicle. The kinematic changes could be a potential source of pain and dysfunction in the shoulder with AC joint dislocation, and therefore surgical reconstruction may be indicated in certain patients.

本文言語English
ページ(範囲)2617-2626
ページ数10
ジャーナルAmerican Journal of Sports Medicine
40
11
DOI
出版ステータスPublished - 2012 11 1

ASJC Scopus subject areas

  • 整形外科およびスポーツ医学
  • 理学療法、スポーツ療法とリハビリテーション

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