| Literature DB >> 16979061 |
Richard W Nyffeler1, Ralph Sheikh, Todd S Atkinson, Hilaire A C Jacob, Philippe Favre, Christian Gerber.
Abstract
The purpose of this study was to determine whether changes in glenoid version are associated with humeral head displacement and changes in the joint reaction forces, as these might contribute to instability or loosening in total shoulder replacement. A total shoulder prosthesis was implanted in neutral version in 6 cadaveric shoulders. Glenoid version was then changed in steps of 4 degrees toward more anteversion and retroversion. An increase in anteversion resulted in anterior translation of the humeral head and in eccentric loading of the anterior part of the glenoid. Retroversion was associated with posterior displacement and posterior loading of the glenoid. A change in rotation of the humeral component did not compensate for altered version of the glenoid component. These results suggest that both instability and glenoid component loosening may be related to the version of the glenoid component. Therefore, assessment of loosening and instability justifies precise assessment of glenoid component version.Mesh：
Year: 2006 PMID： 16979061 DOI： 10.1016/j.jse.2005.09.016
Source DB: PubMed Journal: J Shoulder Elbow Surg ISSN： 1058-2746 Impact factor: 3.019