Anatomic Analysis of the Attachment of the Posteroinferior Labrum and Capsule to the Glenoid: A Cadaveric Study

Glenoid Labral Injuries Are More Common Posteriorly Than Superiorly and Are Combined Across Multiple Areas of the Glenoid

“… 40 This study used criteria developed for a previous survey of treatment options to organize the appearance of injuries, 21 with no attempt to provide a new classification system. By their appearance, these injuries could disrupt the normal 3 layer anatomy of the labrum 42 and could affect the multiple well delineated roles of the labrum as a tension band (injuries involving the superior component with a peel back), a bumper to resist translation and provide edge stability (separation or a split), a washer to distribute loads (insubstance delamination), a deepener of the glenoid socket (flattening of the labrum), or as an attachment site for the glenohumeral ligaments (extension of the tear/split into the PIGHL), which have the common purpose of optimizing dynamic concavity/compression, 32 , 33 , 34 , 43 , 44 , 45 so any anatomic finding displaying these characteristics was considered an injury.…”

Editorial Commentary: Posterior Shoulder Instability and Anatomic Capsular-Labral Reconstruction: Repair the Posterior Inferior Glenohumeral Ligament to the Glenoid Neck at the 7 O’Clock Position

“…The authors have shown that the posterior IGHL inserts between 7 and 9 o'clock in 96% of cases. 10 In 98%, however, the labrum did not attach to the articular surface but attached to both articular cartilage and bone. 10 Based on their findings, they recommend repair of the posterior IGHL onto the glenoid neck at 7 o'clock.…”

“…10 In 98%, however, the labrum did not attach to the articular surface but attached to both articular cartilage and bone. 10 Based on their findings, they recommend repair of the posterior IGHL onto the glenoid neck at 7 o'clock. 10 The anatomic findings confirm the earlier studies 6,7 and are consistent with the description of the Kim lesion.…”

“…10 Based on their findings, they recommend repair of the posterior IGHL onto the glenoid neck at 7 o'clock. 10 The anatomic findings confirm the earlier studies 6,7 and are consistent with the description of the Kim lesion. 8,9 The question is, how important are these findings for clinical practice?…”

“…Koga et al 10 have done a great job in describing the anatomy of the posteroinferior labrum and capsule. In their population, the labrum did not attach to the articular surface, with the posterior IGHL attaching between 7 and 9 o'clock.…”