Research Papers

Acute Recovery of Patellar Tendon From Heat-Induced Shrinkage and Its Inhibition by Cross-Linking

[+] Author and Article Information
Alptekin Aksan

Department of Mechanical Engineering, Biostabilization Laboratory, University of Minnesota, Minneapolis, MN 55455

John J. McGrath

Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, AZ 85721

J Biomech Eng 132(9), 091007 (Aug 19, 2010) (6 pages) doi:10.1115/1.4001924 History: Received October 16, 2008; Revised April 06, 2010; Posted June 04, 2010; Published August 19, 2010; Online August 19, 2010

There are two important factors that accompany heat-induced shrinkage of collagenous tissues: mechanical property degradation and partial recovery from the shrunken length (elongation) upon returning to room temperature (defined here as acute recovery). These undesirable factors reduce the efficacy of thermal therapies. We applied chemical cross-linking adjuvant to thermal treatment on New Zealand White rabbit patellar tendon complexes to explore the feasibility of reducing the impact of these undesirable side-effects. Our results have shown that with exposure to 0.5% w/v glutaraldehyde solution during heating, the recovery response of the patellar tendon tissue was decreased, and the mechanical properties of the tissue were significantly improved.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 1

(a) Experimental setup, (b) zoom view of the hydrothermy cabin, and (c) the RPT complex

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Figure 2

Variation in the total strain e in a representative experiment

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Figure 3

Values of the instantaneous strain e1

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Figure 4

Values of the recovery ratio R

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Figure 5

(a) Fluorescence image of the RPT cross section; (b) the normalized fluorescence intensity I∗=I/Imax as a function of the normalized location x∗=x/xmax




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