Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
The American Journal of Sports Medicine
Year: 2010  |  Volume: 38  |  Issue: 5  |  Page No.: 1000 - 1006

Effect of Shortening Deformity of the Clavicle on Scapular Kinematics: A Cadaveric Study

N Matsumura, H Ikegami, N Nakamichi, T Nakamura, T Nagura, N Imanishi, S Aiso and Y. Toyama    

Abstract: Background

In some short malunion cases, midshaft clavicular fractures are reported to result in unsatisfactory clinical outcomes. Shortening deformity of the clavicle could change the anatomical alignment of the shoulder girdle and is surmised to affect shoulder kinematics on arm movements. Nevertheless, no report has ever referred to documented changes.

Hypothesis

Scapular motion will change with clavicular shortening in cadaveric models.

Study Design

Controlled laboratory study.

Methods

Twelve cadaveric shoulders were used, and sequential clavicular shortening by 0%, 5%, 10%, 15%, and 20% from the original length was simulated in this study. The scapulothoracic motion during passive arm elevation in 3 planes was monitored using an electromagnetic tracking device. Differences in kinematics of the scapula between the 0% shortening models and the other 4 experimental groups were analyzed.

Results

During arm elevation, posterior tilting and external rotation of the scapula significantly decreased with ≥ 10% shortening of the clavicle. Decreased posterior tilting was found with a shorter clavicle and at higher positions of arm elevation in all planes and became obvious during coronal plane elevation. Upward rotation of the scapula did not change with shortening at any elevated arm positions.

Conclusion

The findings of this study clearly indicated that shortening of the clavicle affects the kinematics in the shoulder girdle.

Clinical Relevance

The results of this cadaveric study suggest that clavicular shortening of ≥ 10% affects scapular kinematics and might produce clinical symptoms.

View Fulltext    |   Related Articles   |   Back
   
 
 
 
  Related Articles

No Article Found
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility