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| Title: | Collagen fiber orientation at the tendon to bone insertion and its influence on stress concentrations |
| Author (s): | Thomopoulos, Stavros Marquez, Juan P. Weinberger, Bradley Birman, Victor Genin, Guy M. |
| Department/Lab Affiliations: | Center for Infrastructure Engineering Studies Engineering Education Center at St. Louis |
| Keywords: | insertion site tendon |
| Subject Terms: | Collagen. Modeling. Stress concentration. |
| Issue Date: | 2005 |
| Publisher: | Elsevier |
| Citation: | Thomopoulos, S., J.P. Marquez, B. Weinberger, V. Birman, and G. Genin “Collagen Fiber Orientation at the Tendon to Bone Insertion and its Influence on Stress Concentrations”, Journal of Biomechanics, vol. 39, no. 10, 2006, pp. 1842-1851. |
| Abstract: | The tendon to bone insertion serves the mechanical role of transferring loads from a relatively compliant tendon to a relatively rigid bone. The details of the mechanism of load transfer are of great importance, since current surgical procedures for tendon reattachment have high failure rates. We hypothesized that the microscopic structure of the insertion is optimized to minimize stress concentrations associated with this load transfer. To explore this, collagen fiber orientation distributions were measured in the supraspinatus tendons of rats. The angular deviation of fibers was fairly uniform across the insertion, and the mean angles of the local distributions deviated mildly from the tendon axis. To explore how these observed property distributions could influence load transfer, these distributions were used to derive material properties for an idealized two-dimensional mechanical model of an insertion. Comparison between stress concentrations in this idealized model and those in three comparison models suggests that the microstructure serves to (1) simultaneously reduce stress concentrations and material mass, and (2) shield the insertion's outward splay from the highest stresses. |
| Type: | Article - Journal text |
| In Title: | Journal of Biomechanics |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Pre-print: author can archive; Post-print: author can archive; FULL COPYRIGHT INFORMATION: |
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| Link to this page: |
| title | Collagen fiber orientation at the tendon to bone insertion and its influence on stress concentrations |
| contributor.author | Thomopoulos, Stavros |
| contributor.author | Marquez, Juan P. |
| contributor.author | Weinberger, Bradley |
| contributor.author | Birman, Victor |
| contributor.author | Genin, Guy M. |
| contributor.deptlab | Center for Infrastructure Engineering Studies |
| contributor.deptlab | Engineering Education Center at St. Louis |
| contributor.sponsor | National Institute of Health |
| subject | insertion site |
| subject | tendon |
| subject.LCSH | Collagen. |
| subject.LCSH | Modeling. |
| subject.LCSH | Stress concentration. |
| date.issued | 2005 |
| publisher | Elsevier |
| identifier.citation | Thomopoulos, S., J.P. Marquez, B. Weinberger, V. Birman, and G. Genin “Collagen Fiber Orientation at the Tendon to Bone Insertion and its Influence on Stress Concentrations”, Journal of Biomechanics, vol. 39, no. 10, 2006, pp. 1842-1851. |
| identifier.pub.URI | |
| description.abstract | The tendon to bone insertion serves the mechanical role of transferring loads from a relatively compliant tendon to a relatively rigid bone. The details of the mechanism of load transfer are of great importance, since current surgical procedures for tendon reattachment have high failure rates. We hypothesized that the microscopic structure of the insertion is optimized to minimize stress concentrations associated with this load transfer. To explore this, collagen fiber orientation distributions were measured in the supraspinatus tendons of rats. The angular deviation of fibers was fairly uniform across the insertion, and the mean angles of the local distributions deviated mildly from the tendon axis. To explore how these observed property distributions could influence load transfer, these distributions were used to derive material properties for an idealized two-dimensional mechanical model of an insertion. Comparison between stress concentrations in this idealized model and those in three comparison models suggests that the microstructure serves to (1) simultaneously reduce stress concentrations and material mass, and (2) shield the insertion's outward splay from the highest stresses. |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Postprint |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights | Pre-print: author can archive; Post-print: author can archive; |
| rights.URI | |
| relation.isPartOf | Journal of Biomechanics |
| date.available | 2008-09-30T20:30:52Z |
| identifier.persist.URI |