Macroscopic footprint of the glenoid labrum

Abstract

Objectives: Glenoid labrum lesions are one of the main causes of traumatic shoulder dislocations. Arthroscopic or open repair using suture anchors is commonly used to treat labral lesions. Proper placement of suture anchors in order to replace the normal ligamentous restraint is essential to restore normal anatomy that determines the final location of the repaired labrum. Yet, the most efficient and safest location of the glenoid bone has not been precisely described. Therefore, this study aimed to describe the macroscopic footprint of the glenoid labrum in order to depict the ideal anchor placement location precisely.

Methods: Twenty-two shoulders from 11 cadavers were dissected to reveal glenoid labrum. Clock positions were determined on glenoid labrum circumferentially to evaluate the footprint of the glenoid labrum. The distance between the bony edge of the glenoid rim and the edge of the labrum was measured.

Results: The mean distance from the glenoid labrum to the bony glenoid rim was measured as 5.1 mm (3 o’clock position), 6.2 mm (6 o’clock position), 5.1 mm (9 o’clock position) and 4.1 mm (12 o’clock position) in the anterior, inferior, posterior and superior aspects, respectively. 29.3% of the specimens had a completely defective anterior labrum.

Conclusion: Location of the labrum with respect to the bony glenoid rim should be considered for proper suture placements in treatment of labral tears. It is suggested that the most important step in the stabilization of joint laxity is appropriate placement of the sutures in the anterior and inferior aspects of the glenoid labrum.

Keywords

• glenoid,labrum,footprint

References

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