Functional evaluation of the ligaments at the acromioclavicular joint during anteroposterior and superoinferior translation

Kwang Won Lee, Richard E. Debski, Chih Hwa Chen, Savio L Y Woo, Freddie H. Fu

Research output: Contribution to journalArticlepeer-review

125 Citations (Scopus)

Abstract

We examined the anatomy and measured the in situ force in ligaments at the acromioclavicular joint using a universal force-moment sensor. The in situ force in the coracoacromial, conoid, trapezoid, superior acromioclavicular capsular, and inferior acromioclavicular capsular ligaments of 10 fresh-frozen cadaveric shoulders was determined for a load of 70 N applied to the clavicle in anteroposterior and superoinferior directions. The lengths of the conoid and trapezoid ligaments were found to be 15.1 ± 4.1 and 11.5 ± 2.2 mm, respectively; the widths of the conoid and trapezoid ligaments were 10.7 ± 1.5 and 11.0 ± 2.8 mm, respectively. The in situ force of the trapezoid (42.9 ± 15.4 N) was significantly greater than that for the other ligaments during posterior displacement. Otherwise, no statistically significant differences could be found between any of the in situ forces in each ligament during all other motions examined. During anterior displacement, the inferior acromioclavicular capsular ligament appeared to be the major restraint. The trapezoid ligament was the primary restraint during posterior displacement and provided 55.8% ± 20.0% of the resisting force. Our results suggest that the coracoclavicular and other acromioclavicular joint capsular ligaments should be considered for reconstruction to restore normal joint function, especially in the anterior, posterior, and superior directions.

Original languageEnglish
Pages (from-to)858-862
Number of pages5
JournalAmerican Journal of Sports Medicine
Volume25
Issue number6
Publication statusPublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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