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Assessment and Evaluation of Glenoid Bone Loss

March 01, 2017

Contributors: Sanjeev Bhatia, MD; Jorge Chahla Jr, MD; Jason Taizo Hamamoto, BS; John Higgins, BA; Anthony A Romeo, MD; Nikhil N Verma, MD; Adam Blair Yanke, MD; Timothy Sean Leroux, MD; Timothy Sean Leroux, MD

The preoperative assessment of anterior glenoid bone loss is a critical step in surgical planning for patients with recurrent anterior glenohumeral instability. The structural integrity of the glenoid has been identified as one of the most important factors influencing the success of operative repair. The currently accepted gold standard for glenoid structural assessment among most orthopaedic surgeons is the use of three-dimensional reconstructed computerized tomography images (3DCT) with the humeral head digitally subtracted yielding an en face sagittal oblique view of the glenoid. This view allows for evaluation of glenoid morphology and quantitative assessment of glenoid bone loss. In this video, we describe the practical application of the National Institutes of Health (NIH) Image J software to quantify the amount of glenoid bone loss reported as a percentage of either total surface area or diameter. The equations utilized in this technical note are the following: Diameter-based method - Percent bone loss = (Defect width/Diameter of inferior glenoid circle) x 100%; Surface area method - (Defect surface area/Surface area of inferior glenoid circle) x 100%.

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