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. 2021 Sep 23;9(9).
doi: 10.2106/JBJS.RVW.21.00102.

Subluxation in the Arthritic Shoulder

Frederick A Matsen 3rd  1 , Jason E Hsu
Affiliations

Subluxation in the Arthritic Shoulder

Frederick A Matsen 3rd et al. JBJS Rev. .

Abstract

»: The term "subluxation" means partial separation of the joint surfaces. In the arthritic shoulder, "arthritic glenohumeral subluxation" refers to displacement of the humeral head on the surface of the glenoid.

»: The degree of arthritic glenohumeral subluxation can be measured using radiography with standardized axillary views or computed tomography (CT).

»: Shoulders with a type-B1 or B2 glenoid may show more posterior subluxation on an axillary radiograph that is made with the arm in an elevated position than on a CT scan that is made with the arm at the side.

»: The degree of arthritic glenohumeral subluxation is not closely related to glenoid retroversion.

»: The position of the humeral head with respect to the plane of the scapula is related to glenoid retroversion and is not a measure of glenohumeral subluxation.

»: Studies measuring glenohumeral subluxation before and after arthroplasty should clarify its importance to the clinical outcomes of shoulder reconstruction.

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Conflict of interest statement

Disclosure: The Disclosure of Potential Conflicts of Interest forms are provided with the online version of the article (http://links.lww.com/JBJSREV/A759).

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