Effects of Tendon Viscoelasticity on the Distribution of Forces Across Sutures in a Model of Tendon-To-Bone Repair
Tears to the rotator cuff typically require surgical repair. These repairs often culminate in re-tearing when sutures break through the tendon in the weeks following repair. Although numerous studies have been performed to identify suturing strategies that reduce this risk by balancing forces across sutures, none have accounted for how the viscoelastic nature of tendon influences load sharing. With the aim of providing insight into this problem, we studied how tendon viscoelasticity, tendon stiffness, and suture anchor spacing affect this balancing of forces across sutures. Results from a model of a three-row sutured re-attachment demonstrated that optimized distributions of suture stiffnesses and of the spacing of suture anchors can balance the forces across sutures to within a few percent, even when accounting for tendon viscoelasticity. Non-optimized distributions resulted in concentrated force, typically in the outermost sutures. Results underscore the importance of accounting for viscoelastic effects in the design of tendon-to-bone repairs.
Y. Huang et al., "Effects of Tendon Viscoelasticity on the Distribution of Forces Across Sutures in a Model of Tendon-To-Bone Repair," International Journal of Solids and Structures, vol. 250, article no. 111725, Elsevier, Aug 2022.
The definitive version is available at https://doi.org/10.1016/j.ijsolstr.2022.111725
Mechanical and Aerospace Engineering
Keywords and Phrases
Biomechanics; Biomedical; Orthopedics; Rotator Cuff Tear; Tendon to Bone Attachment
International Standard Serial Number (ISSN)
Article - Journal
© 2022 Elsevier, All rights reserved.
15 Aug 2022
This work was supported by the National Science Foundation, Grant CMMI 1548571.