Tashjian RZ, Chalmers PN, Joyce C, Asghar E, Henninger H. Biomechanical Comparison of Suture Bridge Rotator Cuff Repair With and Without Dermal Allograft Pledgets.
J Shoulder Elbow Surg 2023:S1058-2746(23)00880-7. [PMID:
38122892 DOI:
10.1016/j.jse.2023.10.035]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 10/15/2023] [Accepted: 10/30/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND
One method to augment rotator cuff repair is to pass dermal allograft pledgets along the sutures that bridge from the medial to the lateral row. It remains unclear whether this augmentation method alters repair biomechanics.
METHODS
This was a controlled laboratory study. After an a priori power analysis, nine pairs of rotator cuffs underwent double row suture bridge rotator cuff repair, half randomized to augmentation with dermal allograft pledgets passed along the suture bridge sutures. Repairs were then mounted on a material testing system and loaded cyclically 500 cycles to mesure applied force and displacement. Repairs then underwent ultimate failure testing and stiffness, ultimate failure force, and ultimate failure displacement were measured. Paired t-tests were performed to compare between groups.
RESULTS
There were no differences between groups in construct gapping with cyclic loading after 500 cycles (p = 0.885). There no differences between the augmented and control groups in yield force (103.5 ± 5.0 vs. 101.4 ± 5.9 N, respectively, p=0.183), stiffness (94.2 ± 13.9 vs. 90.9 ± 13.8, p=0.585), or ultimate failure force (255.3 ± 65.8 vs. 285.3 ± 83.2, p=0.315). There were no differences between groups in failure modes, with most specimens failing by cuff tissue tearing within or medial to the construct.
CONCLUSION
The addition of dermal allograft pledgets does not positively or negatively influence the time-zero biomechanical characteristics of double-row suture bridge rotator cuff repair.
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