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- Title
Estimation of dynamic, in vivo soft-tissue deformation: Experimental technique and application in a canine model of tendon injury and repair.
- Authors
Bey, Michael J.; Kline, Stephanie K.; Baker, Andrew R.; McCarron, Jesse A.; Iannotti, Joseph P.; Derwin, Kathleen A.
- Abstract
Outcomes after rotator cuff surgery are typically assessed with measures of strength, joint motion, or pain, but these measures do not provide a direct assessment of tissue function as healing progresses. To address this limitation, this manuscript describes biplane X-ray analysis as a technique for quantifying in vivo soft-tissue deformation. Tantalum beads were implanted in the humerus and infraspinatus tendon in a canine model of tendon injury and repair. Biplane X-ray images were acquired during treadmill trotting and tissue deformation was estimated from the three-dimensional bead positions. Changes over time were characterized by the mean, range, and normalized range (i.e., range/mean) of interbead distance. Intact tendon repair tissue demonstrated significant decreases over time in the mean ( p = 0.003), range ( p = 0.001), and normalized range ( p = 0.001) of interbead distance. Failed tendon repair tissue demonstrated significant decreases over time in the range ( p = 0.05) and normalized range ( p = 0.04) of interbead distance. In an uninjured control, differences over time in the interbead distance parameters were not detected. This approach is a promising technique for estimating changes over time in soft-tissue deformation. These preliminary data indicate appreciable differences between normal tendons, intact repairs, and failed repairs. © 2011 Orthopaedic Research Society Published by Wiley Periodicals, Inc. J Orthop Res 29:822-827
- Subjects
TENDON injuries; TENDON surgery; PAIN; SOFT tissue injuries; DOGS
- Publication
Journal of Orthopaedic Research, 2011, Vol 29, Issue 6, p822
- ISSN
0736-0266
- Publication type
Article
- DOI
10.1002/jor.21315