Ex-vivo evaluation of a modified Teno Fix® device repair pattern versus a 3-loop pulley for repair of equine flexor tendons

McMaster, M. A., Munsterman, A. S., Weimar, W. H., Barrett, E. J. and Hanson, R. R. (2015) Ex-vivo evaluation of a modified Teno Fix® device repair pattern versus a 3-loop pulley for repair of equine flexor tendons. Veterinary Surgery, 44(7), pp. 803-808. (doi: 10.1111/vsu.12350) (PMID:26118652)

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Abstract

Objective: To compare the load to ultimate failure, load to a 2 mm gap, mode of failure, and gap at failure (mm) of the Teno Fix® (TF) to the 3‐loop pulley (3LP) for repair of equine tendon lacerations. The use of 4TF devices versus 5TF devices on load to ultimate failure and load to a 2 mm gap was also compared. Study Design: Ex vivo biomechanical study; unbalanced incomplete block (horse) design. Samples: Cadaveric equine forelimb superficial digital flexor tendon (n = 20 paired tendons). Methods: Ten tendon pairs were selected randomly and repaired with a 3LP and 4TF pattern, and 10 tendon pairs repaired with a 3LP and 5TF pattern. Load to ultimate failure, load to a 2 mm gap, mode of failure, and gap at failure were obtained using materials testing. Results: The 3LP had a significantly greater ultimate load to failure (P < .001, respectively) and a significantly higher load to a 2 mm gap than both TF repairs (P < .001, respectively). The most frequent mode of failure was suture pull‐out for the 3LP and anchor pull‐out for the TF. Gap at failure was significantly larger in the 3LP than both TF repairs (P < .001). The ultimate load to failure was significantly higher for the 5TF than the 4TF (P = .004) but there was no significant difference in load to a 2 mm gap, or gap at failure between both TF repairs (P = .11, P = .15, respectively). Conclusions: Neither TF repair was stronger than the 3LP in load to ultimate failure and load to a 2 mm gap. Addition of a fifth TF device significantly increased the load to ultimate failure but did effect the load to a 2 mm gap over the 4TF.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McMaster, Miss Mattie
Authors: McMaster, M. A., Munsterman, A. S., Weimar, W. H., Barrett, E. J., and Hanson, R. R.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Veterinary Surgery
Publisher:Wiley
ISSN:0161-3499
ISSN (Online):1532-950X
Published Online:29 June 2015

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