Although no significant differences were found in contact pressure between suture labral repair and vertical mattress labral repair of the shoulder, researchers found an increase in mean contact pressure and peak pressure between intact shoulders and the two repair groups, according to study results.
The researchers randomly assigned 20 fresh-frozen human cadaveric shoulders to either simple suture labral repair or vertical mattress labral repair, applying loads through the humeral head to the glenoid surface in the intact shoulder and after repair. The researchers recorded peak contact pressure, mean contact pressure and contact area for 0°, 45° and 90° should abduction, and then the repair was loaded to failure.
At 90° abduction, both repair groups had a significant increase in mean contact pressure and peak contact pressure; however, no difference was seen between the two repair groups, according to the researchers. After both repairs at 90° abduction at 220 N force, the researchers found a significant decrease in total contact area.
According to study results, no significant difference occurred in load-to-failure between the groups. The researchers also found alterations in contact pressure within the glenohumeral joint can affect joint-loading properties. – by Casey Tingle
Disclosures: The researchers report no relevant financial disclosures.