Letters to the Editor   |    
Glenoid Rim Morphology in Recurrent Anterior Glenohumeral Instability
Lieven De Wilde, MD; Bart Berghs, MD; Emmanuel Audenaert, MD
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The authors did not receive grants or outside funding in support of their research or preparation of this work. They did not receive payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. No commercial entity paid or directed, or agreed to pay or direct, benefits to a research fund, foundation, educational institution, or other charitable or nonprofit organization with which the authors are affiliated or associated.

The Journal of Bone and Joint Surgery, Incorporated
J Bone Joint Surg Am, 2004 Mar 01;86(3):646-647
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To The Editor:We read with great interest "Glenoid Rim Morphology in Recurrent Anterior Glenohumeral Instability" (2003:85:878-84), by Sugaya et al. The authors describe a valuable method to evaluate the morphology of the glenoid.As they correctly state, the contour of the inferior part of an unaffected glenoid approximates a circle, and the majority of unstable shoulders have defects in this circle. They suggest that three-dimensionally reconstructed computed tomography is more reliable than other imaging techniques in demonstrating the morphology of the glenoid, although Burkhart et al.1, in an earlier study, reported similar findings with their arthroscopic method. The authors neglect the center of the circle, as it is the bare spot; however, it is a useful point of reference in arthroscopic surgery. Furthermore, we use the inferior quadrants of the glenoid cavity to define the center of this circle, as this is such a consistent finding in open surgery as well2. It is useful not only in surgery for the repair of instability but also as a point of reference for glenoid prosthetic surgery. We congratulate the authors on the results of their research, but we fear that advocating these investigations in the preoperative assessment of shoulder instability will further increase costs. Nevertheless, the diagnostic method seems to be indicated for the evaluation of glenoid morphology prior to reconstructive surgery of the glenoid.
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