Comparison of a 3-hole 4.5-mm Dynamic Compression Plate and a 7-hole 5.5-mm Y Locking Compression Plate for Arthrodesis of the Proximal Interphalangeal Joint in Horses-an Ex Vivo Biomechanical Study

Author(s)

Salazar Latorre, Carlos Adolfo ^[1] ; de Souza, Anderson Fernando ^[1] ; Ramirez Ramos, Paula Andrea ^[2] ; Nobrega, Fernanda Silveira ^[1] ; Mulder van de Graaf, Guilherme Maia ^[1] ; Martins Pereira, Cesar Augusto ^[3] ; Auada Ferrigno, Cassio Ricardo ^[1] ; Hendrickson, Dean A. ^[4] ; do Valle De Zoppa, Andre Luis ^[1]

Affiliation

^[1] Univ Sao Paulo, Sch Vet Med & Anim Sci, Dept Surg, Ave Prof Dr Orlando Marques de Paiva 87, BR-05508270 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Sch Vet Med & Anim Sci, Dept Internal Med, Sao Paulo, SP - Brazil

^[3] Univ Sao Paulo, Sch Med, Dept Orthoped & Traumatol, Sao Paulo - Brazil

^[4] Colorado State Univ, Dept Clin Sci, Ft Collins, CO 80523 - USA

• Document type: Journal article
• Source: Journal of Equine Veterinary Science; v. 94, NOV 2020.
• Web of Science Citations: 0

Abstract

The objective of this study was to compare the biomechanical properties in a single cycle axial loading test and the types of failures in two constructs (a 3-hole 4.5-mm dynamic compression plate (DCP) and 7-hole 5.5-mm Y locking compression plate (Y-LCP)) in equine proximal interphalangeal joint (PIJ) arthrodesis. One limb in each pair was randomly assigned to PIJ arthrodesis using a 3-hole 4.5-mm DCP combined with two transarticular 5.5-mm cortical screws, whereas the contralateral limb was submitted to PIJ arthrodesis using a 7-hole Y-shaped 5.0-mm LCP in conjunction with one transarticular 4.5-mm cortical screw inserted through the central plate hole. Cortical screws were inserted in lag fashion. Constructs were submitted to a single axial load cycle to failure. Construct stiffness, load, and deformation were analyzed. Dynamic compression plate and Y-LCP arthrodesis constructs did not differ significantly and were equally resistant to axial loading under the conditions studied (DCP and Y-LCP group stiffness, 5685.22 N/mm and 6591.10 N/mm, respectively). Arthrodesis of the PIJ using a DCP and two transarticular 5.5-mm cortical screws or a Y-LCP yielded biomechanically equivalent outcomes under the test conditions considered. However, Y-LCP provides less impact in the palmar/plantar bone. Application of Y-LCP with unicortical screws has equivalent biomechanical characteristics of DCP and may be a safe option for PIJ arthrodesis, where potential trauma secondary to applying bicortical screws in the palmar/plantar aspect of the pastern can be avoided. (C) 2020 Elsevier Inc. All rights reserved. (AU)

• FAPESP's process: 11/13913-9 - Arthrodesis of the equine proximal interphalangeal joint: a biomechanical comparison of 3-hole 4.5mm narrow dynamic compression plate with two transarticular 5.5mm oblique cortical screws techniques and 7-hole "Y" locking compression plate 5.0 mm
• Grantee: André Luis do Valle de Zoppa
• Support Opportunities: Regular Research Grants