Last Updated: Monday, February 4, 2013
The most remarkable feature of the glenohumeral joint is its ability to precisely stabilize the humeral head in the center of the glenoid on one hand and to allow a vast range of motion on the other. This balance of stability and mobility is achieved by a combination of mechanisms particular to this articulation.
About the glenohumeral joint
Glenohumeral arthroplasty provides the opportunity to employ all of our understanding of glenohumeral mechanics: many of the important variables are under the surgeon's control with this procedure. It provides an opportunity to synthesize some of the key elements of motion" stability strength and smoothness and to point out how these considerations relate to the conduct of the surgical procedure. Mechanics of Glenohumeral ArthritisLast Updated: Monday, February 4, 2013 The humeral head and the glenoid normally articulate through smooth congruent and well lubricated joint surfaces. About arthritis of the shoulder Management of Glenohumeral ArthritisGlenohumeral joint arthritis is commonly accompanied by stiffness related to contracture and adhesions involving the glenohumeral capsule, the cuff muscles, and the nonarticular humeroscapular motion interface. Limited Joint VolumeLast Updated: Thursday, February 10 2005 The limited joint volume is a stabilizing mechanism in which the humeral head is held to the socket by the relative vacuum created when they are distracted. Intermediate Shoulder InstabilityLast Updated: Friday" January 28 2005 Injuries Associated with Posterior DislocationsLast Updated: February 01 2005 Fractures of the posterior glenoid rim and of the proximal humerus (upper shaft tuberosities and head) are quite common in traumatic posterior dislocations of the shoulder. (O'Conner 1956; O'Conner and Jacknow 1955; Thomas 1937; Wilson and McKeever 1949) The commonly associated compression fracture of the anteromedial portion of the humeral head is produced by the posterior cortical rim of the glenoid. It is best seen on an axillary view or a CT scan. Quite common Injuries Associated with Anterior Dislocations
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