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BMC Musculoskeletal Disorders
Published in: BMC Musculoskeletal Disorders 1/2016

Open Access 01-12-2016 | Case report

Effect of glenoid concavity loss on shoulder stability- a case report in a professional wrestler

Authors: Philipp Moroder, Franziska Haniel, Michael Quirchmayr, Eva Schulz, Manfred Eppel, Nicholas Matis, Alexander Auffarth, Herbert Resch

Published in: BMC Musculoskeletal Disorders | Issue 1/2016

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Abstract

Background

Current glenoid defect measurement techniques only quantify bone loss in terms of defect diameter or surface. However, the glenoid depth plays an important role in shoulder stabilization by means of concavity compression.

Case presentation

We present a case of a professional wrestler who suffered from anterior shoulder instability after sustaining a bony Bankart lesion without loss of glenoid surface area but flattening of the concavity due to medialization of the fragment. The patient’s glenoid concavity was reconstructed arthroscopically by reduction and percutaneous screw fixation of the bony fragment along with a capsulo-ligamentous shift. Changes of the glenoid concavity with according alterations in the Bony Shoulder Stability Ratio (BSSR) were analyzed on pre-op, post-op, and follow-up CT scans. Postoperative CT scans revealed a deepened concavity (3.3 mm) and improved BSSR (46.1 %) compared to pre-op scans (0.7 mm; 11.3 %). Follow-up CT scans showed a slight remodeling of the glenoid concavity (3.2 mm) with steady BSSR (44.7 %).

Conclusion

This case shows that the passive stabilizing effect of the glenoid can be compromised by loss of concavity despite the absence of loss of articular surface. Therefore, addressing the concavity loss and resulting reduction of the BSSR is recommended in these cases. Bony Bankart repair was successful in restoring the BSSR of the patients shoulder as determined by mathematical calculations based on CT scans.
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Metadata
Title
Effect of glenoid concavity loss on shoulder stability- a case report in a professional wrestler
Authors
Philipp Moroder
Franziska Haniel
Michael Quirchmayr
Eva Schulz
Manfred Eppel
Nicholas Matis
Alexander Auffarth
Herbert Resch
Publication date
01-12-2016
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2016
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-016-1210-9

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