Biomechanical comparison of knotted and knotless stabilization techniques of the tarsal medial collateral ligament in cats: A cadaveric study
Objective To compare mechanical properties of intact feline medial collateral ligaments and three techniques for treatment of feline medial tarsal instability. Study design Controlled laboratory study. Sample population Forty‐eight normal, adult feline tarsi. Methods Three repairs were tested: a bon...
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| Published in: | Veterinary surgery Vol. 49; no. 2; pp. 390 - 400 |
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| Main Authors: | , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Hoboken, USA
John Wiley & Sons, Inc
01-02-2020
Blackwell Publishing Ltd |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Objective
To compare mechanical properties of intact feline medial collateral ligaments and three techniques for treatment of feline medial tarsal instability.
Study design
Controlled laboratory study.
Sample population
Forty‐eight normal, adult feline tarsi.
Methods
Three repairs were tested: a bone tunnel with polypropylene (PP) suture, a bone tunnel with polyethylene (PE) cord, and a knotless anchor technique with PE cord. A cyclic (6‐N preload; 5‐N amplitude; 2‐Hz frequency) tensile test (600 cycles) was performed on feline tarsi with either the long or the short medial tarsal ligament intact, with each reconstruction technique followed by a single‐cycle load‐to‐failure test (0.5 mm/s) with a failure point at 2 mm of displacement. Total elongation, peak‐to‐peak elongation, stiffness, and maximum load to failure point were compared with the intact condition.
Results
No differences in stiffness, total elongation, or peak‐to‐peak elongation were found between specimens repaired with the knotless technique and intact controls (P > .04), whereas tarsi repaired with the tunnel technique and PP were weaker (P < .008). Total and conditioning elongation were greater after tunnel reconstruction with PP than after knotless reconstruction (P = .005). Mean load to 2 mm of displacement tended (P = .03) to be higher after knotless than after knotted PP repairs and did not differ (P = .47) between tarsi repaired with the tunnel or anchor repairs with PE.
Conclusion
The mechanical properties of intact tarsi were superior to those of tarsi repaired with tunnel techniques and PP but were similar to those of tarsi repaired with knotless techniques with PE.
Clinical significance
Feline tarsal stabilization with the knotless technique for tarsal medial collateral ligament insufficiency may reduce the requirement for or duration of postoperative coaptation. |
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| Bibliography: | 2019 The American College of Veterinary Surgeons Results from this work were presented at the 45th Annual Veterinary Orthopedic Society Conference; March 10‐17, 2018; Snowmass, Colorado. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 0161-3499 1532-950X |
| DOI: | 10.1111/vsu.13366 |