Acromial types

Changed by Kapisoor Singh, 29 May 2014

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The shape of the acromion had been initially divided into 3 types (which was known as the Bigliani classification ³), to which a fourth has been added ².

Acromion morphology based on sagittal oblique MRI

flat inferiorly
curved - parallel to the humeral head with ~~convex~~concave undersurface - considered commonest type ³
hooked - the most anterior portion of the acromion has a hooked shape, associated with increased incidence of shoulder impingement
convex (upturned) -
- this is the most recent classification of acromion process.
- the undersurface of the acromion is convex near the distal end⁴.
- no convincing correlation between a type 4 acromion and impingement syndrome exists^4-5

-<p>The shape of the <a title="acromion" href="/articles/acromion">acromion</a> had been initially divided into 3 types (which was known as the Bigliani classification <sup>3</sup>), to which a fourth has been added <sup>2</sup>. </p><h5>Acromion morphology based on sagittal oblique MRI</h5>
~~-<ol>~~
~~-<li>~~
~~-<strong>flat </strong>inferiorly</li>~~
~~-<li>~~
~~-<strong>curved</strong> - parallel to the humeral head with convex undersurface - considered commonest type <sup>3</sup>~~
~~-</li>~~
~~-<li>~~
-<strong>hooked</strong> - the most anterior portion of the acromion has a hooked shape, associated with increased incidence of <a href="/articles/subacromial-impingement">shoulder impingement</a> </li>
~~-<li>~~
~~-<strong>convex (upturned)</strong> -~~
~~-<ul>~~
~~-<li>this is the most recent classification of acromion process. </li>~~
~~-<li>the undersurface of the acromion is convex near the distal end<sup>4</sup>. </li>~~
+<p>The shape of the <a href="/articles/acromion">acromion</a> had been initially divided into 3 types (which was known as the Bigliani classification <sup>3</sup>), to which a fourth has been added <sup>2</sup>.</p><h5>Acromion morphology based on sagittal oblique MRI</h5><ol>
+<li>
+<strong>flat </strong>inferiorly</li>
+<li>
+<strong>curved</strong> - parallel to the humeral head with concave undersurface - considered commonest type <sup>3</sup>
+</li>
+<li>
+<strong>hooked</strong> - the most anterior portion of the acromion has a hooked shape, associated with increased incidence of <a href="/articles/subacromial-impingement">shoulder impingement</a>
+</li>
+<li>
+<strong>convex (upturned)</strong> - <ul>
+<li>this is the most recent classification of acromion process.</li>
+<li>the undersurface of the acromion is convex near the distal end<sup>4</sup>.</li>
~~-</li>~~
+</li>
~~-</li>~~
~~-</ol><h4>See also</h4>~~
~~-<ul><li><a title="Acromioclavicular joint configuration" href="/articles/acromioclavicular_joint_configuration">acromioclavicular joint configuration</a></li></ul>~~
+</li>
+</ol><h4>See also</h4><ul><li><a href="/articles/acromioclavicular_joint_configuration">acromioclavicular joint configuration</a></li></ul>

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Acromial types

Updates to Article Attributes

Acromion morphology based on sagittal oblique MRI

See also