Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12470
Title: The effect of size and location of tears in the supraspinatus tendon on potential tear propagation
Authors: Thunes J.
Miller R.M.
Pal S.
Damle S.
Debski R.E.
Maiti S.
Published in: Journal of Biomechanical Engineering
Abstract: Rotator cuff tears are a common problem in patients over the age of 50 yr. Tear propagation is a potential contributing factor to the failure of physical therapy for treating rotator cuff tears, thus requiring surgical intervention. However, the evolution of tears within the rotator cuff is not well understood yet. The objective of this study is to establish a computational model to quantify initiation of tear propagation in the supraspinatus tendon and examine the effect of tear size and location. A 3D finite element (FE) model of the supraspinatus tendon was constructed from images of a healthy cadaveric tendon. A tear of varying length was placed at six different locations within the tendon. A fiber-reinforced Mooney-Rivlin material model with spatial variation in material properties along the anterior-posterior (AP) axis was utilized to obtain the stress state of the computational model under uniaxial stretch. Material parameters were calibrated by comparing computational and experimental stress-strain response and used to validate the computational model. The stress state of the computational model was contrasted against the spatially varying material strength to predict the critical applied stretch at which a tear starts propagating further. It was found that maximum principal stress (as well as the strain) was localized at the tips of the tear. The computed critical stretch was significantly lower for the posterior tip of the tear than for the anterior tip suggesting a propensity to propagate posteriorly. Onset of tear propagation was strongly correlated with local material strength and stiffness in the vicinity of the tear tip. Further, presence of a stress-shielded zone along the edges of the tear was observed. This study illustrates the complex interplay between geometry and material properties of tendon up to the initiation of tear propagation. Future work will examine the evolution of tears during the propagation process as well as under more complex loading scenarios. Copyright © 2015 by ASME.
Citation: Journal of Biomechanical Engineering (2015), 137(8): -
URI: https://doi.org/10.1115/1.4030745
http://repository.iitr.ac.in/handle/123456789/12470
Issue Date: 2015
Publisher: American Society of Mechanical Engineers (ASME)
ISSN: 1480731
Author Scopus IDs: 56050124700
56050752200
35321222100
55568706200
25654514300
7202014965
Author Affiliations: Thunes, J., Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States
Miller, R.M., Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States, Orthopaedic Robotics Laboratory, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States
Pal, S., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, 247667, India
Damle, S., Department of Chemical Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States
Debski, R.E., Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States, Orthopaedic Robotics Laboratory, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA 15260, United States
Maiti, S., Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States, Department of Chemical Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States
Corresponding Author: Maiti, S.; Department of Bioengineering, Swanson School of Engineering, University of PittsburghUnited States
Appears in Collections:Journal Publications [ME]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.