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Improved superior stability
16%
160/1004
Fixed fulcrum kinematics
5%
50/1004
Creates a metal-to-bone articulation with the acromion
27%
269/1004
Increased deltoid moment arm
41%
412/1004
Increased glenohumeral offset
10%
105/1004
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The theoretic advantage of a metal-to-bone articulation with the acromion is that there is a greater arc in which a smooth metal surface contacts the glenoid and acromion. This may improve pain and function, but no studies have evaluated this to date. One study showed results comparable to that of a standard hemiarthroplasty. There are no other biomechanic advantages.
1.2
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