The inferior glenoid labrum provides the inferior socket rim and the critical attachment for the inferior glenohumeral ligament complex — the primary stabiliser against anterior dislocation with the arm in abduction.
Provides the inferior socket deepening, anchors the inferior glenohumeral ligament anteriorly and posteriorly, and participates in the hammock-like support of the humeral head in the abducted position.
Inferior labral avulsion is part of the Bankart lesion complex, and its reattachment is essential for restoring the IGHL anchor. An ALPSA lesion (anterior labrocapsular periosteal sleeve avulsion) involves inferior labral avulsion that medialises along the scapular neck, reducing the effectiveness of the IGHL anchor.
Inferior labral complex medialized on the scapular neck producing a reduced but non-anatomic IGHL anchor, requiring mobilisation and anatomic reattachment during instability repair.
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