To this end, repair augmentation with collagen scaffolds has recently been proposed to enhance the quality of repair when tendon quality and mobilization are not optimal. Repair augmentation as such has shown promising histologic and short-term clinical results when applying the scaffold as an ”onlay” augmentation technique. Questions have been raised, however, as to whether (1) additional suture anchors or (2) a collagen scaffold, as may be required in the repair of massive RCT, would immediately have positive biomechanical effects on repair strength. “Additional suture anchors” refers to the use of 6 rather than 4 anchors in the repair.
The objectives of this study were to compare, in a massive RCT model, the biomechanical properties of SR repair; extended, linked DR repair; and extended DR rotator cuff repair augmented with a collagen scaffold. In addition, biomechanical properties of intact rotator cuff tendons were analyzed for comparison. The hypothesis was that the biomechanical properties of augmented repairs of massive RCT using a collagen scaffold would be superior to those of traditional SR repairs and equivalent to those of DR reconstructions without augmentation. In addition, the biomechanical properties of intact rotator cuff tendons were expected to be superior to those of any of the repair techniques.
Full Article: Biomechanical Analysis of Two Tendon Posterosuperior Rotator Cuff Tear Repairs: Extended Linked Repairs and Augmented Repairs