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Glenoid version and rotator cuff tears.

Patrice Tétreault1, Andreas Krueger, David Zurakowski

  • 1Hôpital Notre-Dame, University of Montreal, Montreal, Canada H2L 4M1.

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
|December 6, 2003
PubMed
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Rotator cuff tears are linked to specific glenoid orientations. Abnormal glenoid angles, measured via MRI, predict the location of rotator cuff injuries, aiding in diagnosis and treatment.

Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Anatomy

Background:

  • Rotator cuff tears are common shoulder injuries.
  • Glenoid orientation may influence rotator cuff pathology.
  • Understanding this relationship can improve diagnostic accuracy.

Purpose of the Study:

  • To investigate the association between rotator cuff tear and glenoid orientation.
  • To determine if specific glenoid angles predict tear location.

Main Methods:

  • MRI analysis of 96 shoulders undergoing rotator cuff repair.
  • Measurement of acromio-glenoid (AG) angle and supraspinatus fossa glenoid angles (SGAP, SGAX).
  • Comparison of angles between patients with rotator cuff tears and controls, and between anterior and posterior tear groups.

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Main Results:

  • Patients with rotator cuff tears exhibited a smaller AG angle and larger SGAP angle compared to controls (p<0.001).
  • Significant differences in glenoid version (SGAX) were found between anterior (-5+/-4 degrees) and posterior (3+/-3 degrees) cuff tears (p<0.001).
  • Glenoid retroversion predicted anterior cuff tears; anteversion predicted posterior cuff tears.

Conclusions:

  • Glenoid orientation is significantly associated with rotator cuff tears.
  • Specific glenoid angles are predictive of anterior or posterior rotator cuff injuries.
  • MRI-measured glenoid orientation may serve as a diagnostic biomarker for rotator cuff tear patterns.