Vet Comp Orthop Traumatol 2023; 36(04): 184-192
DOI: 10.1055/s-0043-1761244
Original Research

Minimally Invasive Arthrodesis of the Equine Proximal Interphalangeal Joint: A Biomechanical Comparison of Three 5.5-mm Cortical Screws Inserted in Lag Fashion and Two 7.0-mm Headless Cannulated Dual-Pitch Compression Screws

1   Department of Animal Medicine, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
,
Anderson Luiz De Carvalho
1   Department of Animal Medicine, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
,
2   Department of Mechanical Engineering, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
,
Matheus Lothar Schmidt
3   Post-Graduation Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
,
Cleiton Costa Mertz
3   Post-Graduation Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
,
Cesar Augusto Camacho Rozo
4   Universidad del Quindío, Armenia, Quindío, Colombia
,
Joanna Kulczynski Campos
1   Department of Animal Medicine, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
,
1   Department of Animal Medicine, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
› Author Affiliations

Abstract

Objective The aim of this study was to compare the biomechanical properties of two minimally invasive arthrodesis techniques of the equine proximal interphalangeal (PIP) joint (three transarticular 5.5-mm cortical screws [AO-3TLS] vs. two transarticular 7.0-mm headless cannulated multi-use compression screws [MUC-2TS]) in dynamic non-destructive testing and compression testing to failure.

Study Design The experimental study included six pairs of cadaveric adult equine forelimbs; one limb from each horse was randomly assigned to one of the treatments, and the contralateral limb was submitted to the remaining treatment. The dynamic test was performed alternating non-destructive compression tests at a displacement rate of 5 mm/min up to 5,000 N and sinusoidal compressive cyclic tests at 6 Hz, using a 3,600-N amplitude for 8,550 cycles. Construct stiffness and maximum sagittal plane rotation about the PIP joint markers were determined during the dynamic test. After the dynamic test reached 136,800 cycles, the monotonic compressive test until failure was performed on each construct: load, displacement and sagittal plane rotation about the PIP joint marker at failure were analysed.

Results The evaluated biomechanical properties showed no statistical difference between the AO-3TLS and MUC-2TS treatment groups in any of the ramps of the dynamic non-destructive test and in the compression loading until failure test.

Conclusion The MUC-2TS treatment produced biomechanical properties equivalent to the AO-3TLS treatment for PIP joint arthrodesis.

Ethical Approval Statement

The study protocol was previously analysed and approved by the Animal Ethics Committee of Federal University of Rio Grande do Sul (process no. 40199) and owners, in accordance with the National Council for the Control of Animal Experimentation. The limbs used in the study were donated by a slaughterhouse that meets all European Union ethical standards for animal welfare and standards for slaughter under Council Regulation (EC) No. 1099/2009 on the protection of animals at the time of killing. The animals were slaughtered for reasons unrelated to this study.


Authors' Contribution

A.S.R., M.M.A. and J.M.V. developed the idea for the article. A.S.R., A.L.dC. and J.K.C. performed the surgical part of the project. M.L.S., C.C.M. and A.S.R. performed the collection and processing of biomechanical data. C.A.C.R. performed the statistical analysis. Data analysis and interpretation by A.S.R., M.M.A., J.M.V. and A.L.dC. All authors contributed to critical revision, written and approved the final manuscript.




Publication History

Received: 15 March 2022

Accepted: 15 December 2022

Article published online:
09 February 2023

© 2023. Thieme. All rights reserved.

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 
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