In addition to anchor pullout failure, tearing of the suture through the soft tissue is a well-recognized mode of failure. Increasing attention is being paid to modern suture materials such as new tape-like suture materials which are already in use for rotator cuff repair. A biomechanical study on bovine cadavers documented similar biomechanical properties for tape repairs compared to normal suture repairs in a setting of rotator cuff testing. The use of a suture-tape material has not been evaluated for Bankart repairs yet. Further, the biomechanical properties of the native capsulolabral complex must be defined in order to better understand how well current repair techniques are restoring stability at time zero.
The study aims were to clarify whether the use of suture-tape is advantageous for Bankart repairs compared to normal suture repairs, and whether the amount of anchors placed within the anteroinferior or posteroinferior quadrant is an important factor for stability of the repair. Additionally, the strength of the native capsulolabral complex was investigated, and the failure modes of the intact group were compared to the repair groups.
The following hypotheses were tested for glenoid labrum repairs: (1) anchors loaded with the new suture-tape mate- rial will provide higher biomechanical stability compared to anchors loaded with normal sutures, (2) four anchors will provide higher stability compared to three anchors, and (3) the stability of the native capsulolabral complex will be higher when compared to the reconstructions.
Full Article: Biomechanical Evaluation of Knotless Anterior and Posterior Bankart Repairs