Abstract
* The optimal amount of glenohumeral radial mismatch in anatomic shoulder arthroplasty remains undefined, but the consensus among multiple studies suggests between 4 and 8 mm.* Current implant designs offer mismatch of the radii of curvature between the humeral head and the glenoid ranging from 1 to 38 mm.* Clinically, conforming glenoids demonstrate greater loosening and lucency scores compared with nonconforming glenoid components; however, survivorship advantages have not been proven.* There remains a range of radial mismatch tolerances that improve glenohumeral kinematics and wear patterns, which appear to be greater when the glenoid is loaded centrally and is supported in neutral glenoid version.
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