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Related Experiment Videos

Glenohumeral motion after complete capsular release.

M J Moskal1, D T Harryman, A A Romeo

  • 1Department of Orthopaedics, The University of Washington School of Medicine, Seattle 98195-6500, USA.

Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association
|June 4, 1999
PubMed
Summary

Complete capsular release significantly increases glenohumeral range of motion and translation in cadavers. The rotator cuff limits motion and translation even after capsular release.

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Area of Science:

  • Orthopedics
  • Biomechanics
  • Anatomy

Background:

  • The joint capsule primarily limits glenohumeral motion.
  • Capsular contracture causes significant glenohumeral motion restriction.
  • Capsular release is used for refractory glenohumeral joint stiffness.

Purpose of the Study:

  • To investigate the effect of complete capsular release on glenohumeral kinematics in a cadaver model.
  • To quantify changes in elevation, rotation, and translation after capsular release.

Main Methods:

  • Eight cadaveric glenohumeral preparations were used.
  • Glenohumeral kinematics (elevation, rotation, translation) were measured before and after complete capsular release.
  • Torque and range of motion were analyzed.

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Main Results:

  • Complete capsular release increased maximal elevation by 15%.
  • Significant gains in internal and external rotation were observed, particularly in specific planes.
  • Glenohumeral translation increased in all directions, but dislocation did not occur.
  • The rotator cuff limited motion and translation after capsular release.

Conclusions:

  • Complete capsular release significantly enhances glenohumeral range of motion and translation.
  • The rotator cuff plays a crucial role in limiting motion and translation, even after capsuloligamentous structures are released.