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Related Experiment Video

Updated: Dec 25, 2025

A Mouse Model of Ankle-Subtalar Complex Joint Instability
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Anterior Instability: What to Look for.

Christopher J Burke1, Tatiane Cantarelli Rodrigues1, Soterios Gyftopoulos2

  • 1Department of Radiology, NYU Langone Health, NYU Langone Orthopedic Center, 333 East 38th Street, New York, NY 10016, USA.

Magnetic Resonance Imaging Clinics of North America
|April 4, 2020
PubMed
Summary

Recurrent anterior shoulder instability (ASI) often follows traumatic dislocations. This study reviews ASI anatomy, injury, and advanced imaging techniques like 3D CT and MR imaging for assessing bone loss and lesion types.

Keywords:
Anterior shoulder instabilityEngaging and nonengaging lesionsGlenoid bone lossGlenoid trackOn-track and off-track lesions

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Area of Science:

  • Orthopedics
  • Radiology
  • Sports Medicine

Background:

  • Anterior glenohumeral dislocations frequently result from trauma.
  • Recurrent anterior shoulder instability (ASI) affects many patients post-dislocation.
  • Understanding capsulolabral injury pathophysiology is crucial for managing ASI.

Purpose of the Study:

  • To review the anatomy and biomechanics of ASI.
  • To discuss the pathophysiology of capsulolabral injury in ASI.
  • To evaluate the role of various imaging modalities in diagnosing and quantifying ASI.

Main Methods:

  • Review of literature on shoulder anatomy, biomechanics, and ASI pathophysiology.
  • Description of conventional and advanced imaging techniques, including computed tomography (CT) and MR imaging.
  • Emphasis on the utility of arthrography and specialized imaging positions.
  • Discussion of 3D CT and MR imaging for quantifying bone loss.

Main Results:

  • Detailed examination of engaging/nonengaging and on-track/off-track lesions.
  • Highlighting the importance of accurate bone loss quantification using 3D imaging.
  • Integration of imaging findings with anatomical and biomechanical concepts.

Conclusions:

  • Advanced imaging, particularly 3D CT and MR imaging, significantly improves the assessment of bone loss in ASI.
  • Classifying lesions as engaging/nonengaging and on-track/off-track aids in surgical decision-making.
  • A comprehensive understanding of anatomy, biomechanics, and imaging is essential for managing recurrent ASI.