Ex vivo biomechanical evaluation and comparison of lateral femoro-fabella ligament suture and lateral suture with bone anchor for cranial cruciate ligament repair in cats

Author:

Tassani Chiara12,de Witt Anika A.1,Fosgate Geoffrey T.3,Elliott Ross C.1

Affiliation:

1. Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa

2. Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy

3. Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa

Abstract

Abstract OBJECTIVE To compare the biomechanical properties of lateral femoro-fabella ligament suture (FFLS) and lateral suture with a bone anchor suture (BAS) for management of feline cranial cruciate ligament disease. ANIMALS 12 femurs from 6 mature cat cadavers. METHODS The samples were collected from April to June 2023. The specimens had an FFLS and, subsequently, BAS placed and were positioned into a biomechanical testing machine, preloaded from 5 N to 15 N for 100 cycles, and subsequently, a load to suture failure was applied. The displacement at 5 N and 15 N, the total precycle displacement (millimeters), the force at 3 mm displacement and at failure (newtons), the displacement at failure (millimeters), and the stiffness to failure (Newton:millimiter) were recorded. Nonparametric Wilcoxon signed-rank tests were used to compare data between the 2 groups. RESULTS The displacement at 5 N and 15 N and the total precycle displacement were significantly higher in the FFLS group compared to the BAS group. Additionally, the FFLS group results showed less consistent displacement and marked variability. The force (newtons) at 3 mm displacement was higher in the BAS group. There was no significant difference in force and no significant difference in displacement at failure between the 2 groups. However, the stiffness to failure (N/mm) was significantly higher in the BAS group. CONCLUSION BAS represented a more stable and reliable femur attachment for extracapsular suture in cats. CLINICAL RELEVANCE To demonstrate the stability and reliability between BAS and FFLS and influence implant selection in the treatment of cranial cruciate ligament rupture in cats with evaluation of biomechanical properties.

Publisher

American Veterinary Medical Association (AVMA)

Reference40 articles.

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3. Comparison of extracapsular stabilization techniques using an ultrasonically implanted absorbable bone anchor (Weldix) after cranial cruciate ligament rupture in cats—an in vitro study;Koch L,2021

4. Complications associated with feline cranial cruciate ligament techniques;Langley-Hobbs SJ,2021

5. Feline cranial cruciate rupture: 17 cases and a review of the literature;Harasen GL,2005

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