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Validating the Glenoid Track Concept Using Dynamic Arthroscopic Assessment.

Mustafa S Rashid1, Saho Tsuchiya1, Kristie D More2

  • 1Department of Surgery, Section of Orthopedic Surgery, McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada.

Orthopaedic Journal of Sports Medicine
|February 23, 2024
PubMed
Summary
This summary is machine-generated.

The glenoid track concept for assessing Hill-Sachs lesions in shoulder instability shows moderate accuracy. Both 3D CT and static arthroscopic methods require cautious use by surgeons for decision-making.

Keywords:
dislocationglenoid trackinstabilityrecurrenceshoulder

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Area of Science:

  • Orthopedic surgery
  • Sports medicine
  • Shoulder instability research

Background:

  • Recurrent shoulder instability after Bankart repair prompts evaluation of Hill-Sachs lesions.
  • The glenoid track concept aids in classifying Hill-Sachs lesions as 'on-track' or 'off-track' to guide treatment.
  • Validation of the glenoid track concept's accuracy and reliability is crucial for surgical decision-making.

Purpose of the Study:

  • To assess the accuracy and reliability of the glenoid track concept.
  • To compare diagnostic methods for Hill-Sachs lesion engagement.
  • To validate the glenoid track concept against dynamic arthroscopic assessment.

Main Methods:

  • A cohort of 49 patients with recurrent traumatic anterior shoulder instability undergoing Bankart repair was studied.
  • Shoulder stability was assessed using 3D computed tomography (3DCT) and static arthroscopic measurements.
  • Classifications were validated against dynamic arthroscopic assessment in an 'athletic position' to evaluate Hill-Sachs lesion engagement.

Main Results:

  • 3DCT showed higher positive predictive value (66%) and accuracy (65%) than static arthroscopy (42%, 59%).
  • Static arthroscopy demonstrated higher negative predictive value (96%) and sensitivity (96%) compared to 3DCT (64%, 81%).
  • Interrater reliability was 'fair' for 3DCT (α=0.368) and 'moderate' for static arthroscopy (α=0.523); intrarater reliability was 'moderate' for 3DCT (ICC=0.660) and 'good' for static arthroscopy (ICC=0.769).

Conclusions:

  • Both 3DCT and static arthroscopic measurements for glenoid track status provide moderate accuracy and reliability.
  • Surgeons should exercise caution when using the glenoid track concept with either 3DCT or static arthroscopic measurements for surgical decisions.
  • Further research may be needed to refine the glenoid track concept's application in managing shoulder instability.