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Arthrodesis of the Equine Proximal Interphalangeal Joint: A Biomechanical Comparison of 3‐Hole 4.5 mm Locking Compression Plate and 3‐Hole 4.5 mm Narrow Dynamic Compression Plate, with Two Transarticular 5.5 mm Cortex Screws
Author(s) -
Zoppa André L. V.,
Santoni Brandon,
Puttlitz Christian M.,
Cochran Kayla,
Hendrickson Dean A.
Publication year - 2011
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/j.1532-950x.2010.00792.x
Subject(s) - cadaveric spasm , medicine , interphalangeal joint , sagittal plane , dynamic compression plate , arthrodesis , compression (physics) , biomechanics , fixation (population genetics) , forelimb , joint (building) , orthodontics , population , anatomy , materials science , internal fixation , structural engineering , composite material , pathology , alternative medicine , environmental health , engineering
Objectives: To compare the biomechanical characteristics of 2 arthrodesis techniques for the equine proximal interphalangeal joint (PIP) using either a 3‐hole 4.5 mm locking compression plate (LCP) or 3‐hole 4.5 mm narrow dynamic compression plate (DCP), both with 2 transarticular 5.5 mm cortex screws. Study Design: Experimental. Sample Population: Cadaveric adult equine forelimbs ( * n=6 pairs). Methods: For each forelimb pair, 1 limb was randomly assigned to 1 of 2 treatment groups and the contralateral limb by default to the other treatment group. Construct stiffness, gap formation across the PIP joint, and rotation about the PIP joint were determined for each construct before cyclic axial loading and after each of four, 5000 cycle loading regimens. After the 20,000 cycle axial loading regimen, each construct was loaded to failure. Results: There were no significant differences in construct stiffness, gap formation, or sagittal plane rotation between the LCP and DCP treatment groups at any of the measured time points. Conclusion: Biomechanically, fixation of the equine PIP joint with a 3‐hole 4.5 mm LCP is equivalent to fixation with a 3‐hole 4.5 mm narrow DCP under the test conditions used.