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TECHNICAL PAPERS: Soft Tissue

Influence of Decorin and Biglycan on Mechanical Properties of Multiple Tendons in Knockout Mice

[+] Author and Article Information
Paul S. Robinson, Elan Kazam

McKay Orthopaedic Research Laboratory, University of Pennsylvania, 424 Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081

Tung-Fu Huang

Taipei Veterans General Hospital and National Yang-Ming University, Taipei, Taiwan

Renato V. Iozzo, David E. Birk

Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA 19104-6081

Louis J. Soslowsky

McKay Orthopaedic Research Laboratory, University of Pennsylvania, 424 Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081e-mail: soslowsk@mail.med.upenn.edu

J Biomech Eng 127(1), 181-185 (Mar 08, 2005) (5 pages) doi:10.1115/1.1835363 History: Received March 31, 2004; Revised August 20, 2004; Online March 08, 2005
Copyright © 2005 by ASME
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References

Figures

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Tail tendon fascicle prepared and in the test fixture Bar=2 mm
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Representative plots of prescribed strain (A) and stress response (B) in tail tendon fascicle testing. Dotted line=constant elongation rate to failure tests. Solid line=incremental stress relaxation tests. Percent relaxation was determined from the stress relaxation curves as the difference between peak stress (a) and final stress (b). The maximum stress (c) and modulus (m) were determined from the constant elongation rate to failure tests.
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Patellar (left) and flexor digitorum longus (right) tendons in test fixtures; bar=5 mm
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Representative plots of prescribed strain (A) and stress response (B) in patellar and flexor digitorum longus testing. Percent relaxation was determined from the stress relaxation curves as the difference between peak stress (a) and final stress (b). The maximum stress (c) and modulus (m) were determined from the constant elongation rate to failure.
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Maximum stress in ramp to failure tests, mean+st. dev., *p<0.02
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Modulus in ramp to failure tests, mean+st. dev., *p<0.004
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Percent relaxation in stress relaxation tests, mean+st. dev., *p=0.006

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