Vet Comp Orthop Traumatol 2021; 34(06): 411-418
DOI: 10.1055/s-0041-1735315
Original Research

Effects of Femorotibial and Tibiotarsal Joint Ranges of Motion on the Gastrocnemius Muscle-Tendon Working Length in the Canine Cadaveric Limb

Takanori Sugiyama
1   Translational Research and Animal Clinical Trial Study Group (TRACTS), Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Werribee, Victoria, Australia
,
Andrew Woodward
1   Translational Research and Animal Clinical Trial Study Group (TRACTS), Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Werribee, Victoria, Australia
,
Stewart D. Ryan
1   Translational Research and Animal Clinical Trial Study Group (TRACTS), Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Werribee, Victoria, Australia
› Author Affiliations

Abstract

Objective This study aimed to describe changes in the length of the gastrocnemius muscle-tendon unit between the medial fabella and the calcaneus (MF-C) at different femorotibial joint (FTJ) and tibiotarsal joint (TTJ) angle combinations in the canine limb.

Study Design This is an ex vivo kinematic study.

Animals Canine cadaveric pelvic limbs (n = 11).

Procedures One cadaveric pelvic limb was dissected to identify the anatomical origin and insertion of the gastrocnemius muscle-tendon unit for the radiographic landmark determination. The radiographic landmarks of the FTJ and TTJ were identified by lateral view radiographs. A series of lateral radiographs were evaluated to measure the linear MF-C at all combinations of the FTJ and TTJ angles. A mathematical model was defined for MF-C.

Results The MF-C is associated with the FTJ and TTJ by a linear trigonometric relationship. Higher rate of increase in the MF-C was observed when the FTJ was > 135 degrees and the TTJ was < 125 degrees, compared with when the FTJ was <135 degrees and the TTJ was >125 degrees in all groups.

Conclusions Thirty degrees of free range of motion of the TTJ between 140 and 170 degrees did not elongate MF-C in this cadaveric limb study.

Clinical Relevance Some degrees of free range of motion may be possible in the TTJ during tendon healing based on our cadaveric study without causing excessive change in the MF-C, although this concept should not be applied until isometric contractions of muscles are clearly understood. The relationship between the MF-C and tension at tenorrhaphy should be evaluated.

Note

The results of the work in parts were presented at the 2018 American College of Veterinary Surgeons (ACVS) Summit in Phoenix, AZ, October 24–27, 2018.


Authors' Contributions

T.S. drafted the work, and T.S., A.W. and S.D.R.revised critically for important intellectual content, and all contributed to final approval of the version to be published. All the authors came to agreement for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.


Supplementary Material



Publication History

Received: 12 December 2020

Accepted: 21 July 2021

Article published online:
06 September 2021

© 2021. Thieme. All rights reserved.

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 
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